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HomeMy WebLinkAboutCOM 0646.001 2018-2020 Harry Kim David Yamamoto,P.E. Mayor Director �T6 OP•Mp�i Wil Okabe Allan G.Simeon,P.E. 114anaging Director Deputy Director County of Hawaii DEPARTMENT OF PUBLIC WORKS Aupuni Center 101 Pauahi Street,Suite 7 Hilo,Hawaii 96720-4224 (808)961-8321� Fax(808)961-8630 public_works@hawaiicounty.gov November 27, 2019 i, HONORABLE CHAIRMAN AARON CHUNG AND MEMBERS OF THE HAWAII COUNTY COUNCIL HAWAII COUNTY COUNCIL -- HILO, HAWAII 96720 SUBJECT: Annotated Version of 2015 International Energy Conservation Code (IECC) Amendments to Chapter 5, Building Code Transmitted herewith is an annotated version of the bill for an ordinance. This draft incorporates by reference, the IECC, 2015 Edition, into Chapter 5 of the Hawaii County Code. Proposed changes to the language of the IECC that have been incorporated into the Code, are indicated using brackets and strike outs for repeals and underscoring for additions. Exploratory comments about the proposed amendments are included as well. P;,A r. 7 David Yamamoto Harry Ki Director of Public Works Mayor cc: BLD Public Works and Mass Transit Committee Chair (w/attach) Comm. N _ Ref. To: C l'1 Ref. Dote NOV 2 9 2019 County of Hawaii is an Equal Opportunity Provider and Employer. Hawaii County Energy Code Bill Annotated Draft 11/27/19 Note to the reader: This draft incorporates by reference, the International Energy Conservation Code, 2015 Edition, (JECQ into chapter 5 of the Hawai'i County Code. Proposed changes to the language of the IECC that have been incorporated into the Code, are indicated using brackets and strike outs for repeals and underscoring-for additions. Explanatory comments about the proposed amendments are included as well. SECTION 1. Chapter 5, article 4, of the Hawaii County Code 1983 (2016 Edition, as amended), is repealed. SECTION 2. Chapter 5, of the Hawaii County Code 1983 (2016 Edition, as amended), is amended by adding a new article to be designated article 4, and to read as follows: "Article 4. Energy Conservation. Sections: 5-84 Purpose. 5-85(a) The International Energy Conservation Code incorporated. 5-85(b)(1) Subsection C101.1 amended. 5-85(b)(2) Subsection C101.4 amended. 5-85(b)(3) Subsection C102.1 amended. 5-85(b)(4) Subsection C103.1 amended. 5-85(b)(5) Subsections C103.3.2 and C103.3.3 deleted in their entirety. 5-85(b)(6) Subsection C202 amended. 5-85(b)(7) Subsection C401.2 amended. 5-85(b)(8) Subsection C402.1.1 amended. 5-85(b)(9) Table C402.1.3 deleted in its entirety and replaced. 5-85(b)(10) Subsection C402.2.3 amended. 5-85(b)(11) Table C402.4 deleted in its entirety and replaced. 5-85(b)(12) Subsection C402.4.3.5 added. 5-85(b)(13) Subsection C402.5 amended. 5-85(b)(14) Subsection C403.2.4.2.4 added. 5-85(b)(15) Subsection C405.2 amended. 5-85(b)(16) Subsection C405.2.4 amended. Hawaii County Energy Code Bill Annotated Draft 11/27/19 5-85(b)(17) Subsection 0405.10 added. 5-85(b)(18) Subsection C406.3 amended. 5-85(b)(19) Subsection C408.2 amended. 5-85(b)(20) Subsection 0408.2.4.1 deleted in its entirety. 5-85(b)(21) Subsection C408.3.1 amended. 5-85(b)(22) Subsection C501.4 amended. 5-85(b)(23) Subsection 0503.3.1 amended. 5-85(b)(24) Subsection R101.1 amended. 5-85(b)(25) Subsection 8103.1 amended. 5-85(b)(26) Subsections R103.3.2 and R103.3.3 deleted in their entirety. 5-85(b)(27) Subsection 8202 amended. 5-85(b)(28) Subsection R401.2 amended. 5-85(b)(29) Subsection R401.2.1 amended. 5-85(b)(30) Subsection R401.3 amended. 5-85(b)(31) Subsection R402.1 amended. 5-85(b)(32) Table R402.1.2 deleted in its entirety and replaced. 5-85(b)(33) Subsection R402.1.2 amended. 5-85(b)(34) Subsection R402.2 amended. 5-85(b)(35) Subsection R402.2.5 amended. 5-85(b)(36) Subsection R402.3.2 amended. 5-85(b)(37) Subsection R402.4.1.2 amended. 5-85(b)(38) Subsection R403.5.5 added. 5-85(b)(39) Subsection R404.2 added. 5-85(b)(40) Subsection R404.3 added. 5-85(b)(41) Table R405.5.2(1) amended. 5-85(b)(42) Section R407 added. (Also adds Table R407.1) 5-85(b)(43) Subsection R501.4 amended. 5-85(b)(44) Subsection 8502.1 amended. 5-85(b)(45) Subsection R503.1.1 amended. 5-85(b)(46) Subsection R503.2 amended. 2 Hawaii County Energy Code Bill Annotated Draft 11/27/19 Section 5-84. Purpose. This article adopts with amendments, the International Energy Conservation Code, 2015 Edition, as it was incorporated into the Hawaii State Energy Conservation Code that became effective on March 31, 2017. The purpose of the resulting article is to promote the design of energy-efficient building envelopes and installation of energy-efficient mechanical, lighting, and power systems by establishing minimum standards that promote modem and up-to-date energy- efficient performance in the construction, alteration, or equipment of buildings or structures in the County of Hawaii. Section 5-85. International Energy Conservation Code adopted. (a) The"International Energy Conservation Code,2015 Edition"herein referred to as the "International Energy Conservation Code,"as copyrighted and published in 2015 by the International Code Council,Incorporated, 500 New Jersey Avenue, 6th Floor,Washington, DC 20001, is incorporated by reference and made a part of this chapter, subject to the amendments hereinafter set forth in this article. The appendices of the International Energy Conservation Code are not adopted except as provided in this article. A copy of the International Energy Conservation Code shall be available for public inspection at the Hilo and Kailua-Kona offices of the department of public works and at the office of the county clerk. (b) This incorporation by reference includes all parts of the International Energy Conservation Code, 2015 Edition, subject to the amendments hereinafter set forth. (1) Subsection C101.1 of the International Energy Conservation Code is amended to read as follows: "CI01.1 Title. This code shall be known as the [whitei-national] Energy Conservation Code [of NAME OF Tr PUSDICTION] and shall be cited as such. [it is referred to herein as "this Bade."] "This code"when used within the International Energy Conservation Code as incorporated by reference herein, means the Energy Conservation Code of the County of Hawai'i." Comment: Standard language. See Energy Conservation Code of the State ofHawai'i (hereafter "State ECC') at§3-181.1-4, Hawaii Administrative Rules (hereafter "HAR'). (2) Subsection C 101.4 of the International Energy Conservation Code is amended to read as follows: "CI01.4 Applicability. Where, in any specific case, different sections of this code or other adopted codes specify different materials, methods of construction or other requirements, the most festfietive shall gav code official shall determine which 3 Hawaii County Energy Code Bill Annotated Draft 11/27/19 code requirements shall prevail. Where there is a conflict between a general requirement and a specific requirement, the specific requirement shall govern." Comment. Maui Justification: This will allow the code official to review code conflicts and make the most reasonable determination. See: §16 16B.CI 01,4, Maui County Code (hereafter "MCC'). (3) Subsection C102.1 of the International Energy Conservation Code is amended to read as follows: "C102.1 General. This code is not intended to prevent the use of any material, method of construction, design or insulating system not specifically prescribed herein, provided that such construction, design or insulating system has been approved by the code official as meeting the intent of this code. The code official may allow alternative energy conservation standards for nonstandard building materials, unique or limitations of design, special methods of construction, andgeographical location. The code of ficial may require construction plans,research reports, and tests prepared by a registered design professional in order to determine whether to allow such lower standards." Comments: A. This added language is similar to language adopted by Maui County. See: §1616B.C]02.1, MCC. B. The code should not prohibit nonstandard building methods and materials such as those: 1) Used in indigenous Hawaiian architecture and membrane structures, 2) Resulting from design limitations like timber frame construction, open beam roofs, or 3) Additions to existing conditions, geographical locations in valleys and other obstructions. (4) Subsection C103.1 of the International Energy Conservation Code is amended to read as follows: "C103.1 General. [Gons4eetion doeumei4s mid othef siippofting data shall be submit4ed in one or more sets with eaeh application faf a pefrait. The eonstfuefieta doetimetAs shall be pfepar-ed by a fegistefed design pfaf�ssiona4 whefe fequifed-by the statutes of the jtffisdiefiaft in which the pfejeet is to be eonstfueted. NVhefe speeia4 eenditions exist, the code offieial is atAhofized to —eessafy eanstfuetio.B. doeumeffts to be pfepafed by a fegistefed design pfafessional. 4 Hawaii County Energy Code Bill Annotated Draft 11127119 they ura J Construction documents and other supporting data shall be submitted to indicate compliance with this code. The construction documents shall be prepared design approved, and observed by a duly registered licensed professional as required by chapter 464, Hawaii Revised Statutes and in accordance with the provisions of chapter 5, Hawaii County Code. The licensed professional shall certify via a signed statement on the plans, that the project complies with this code. Exception: Any building work that is not required to be prepared designed, approved, or observed by a licensed professional architect or engineer pursuant to chapter 464, Hawaii Revised Statutes, shall be certified by the owner." Comments: A. State Justification: Standard administrative code language. B. See State ECC at§3-181.1-7, HAR, Kauai County at§12-6.4(2), KCC, and Maui County at§16.16B.C103.1, MCC. (5) Subsections C103.3.2 and C103.3.3 of the International Energy Conservation Code are deleted in their entirety. "[ w-hieh a lawfid permit has been hefetofefe issued of athefwise lawfully authofized-, a*d the eenstfuetion of whieh has been pursued in good faith within 180 days af4ef the effeetive date of this eede and has not been abandoned. C103.3.3 Phased approval. The eode offieial shall ha-ve the atAhafity to pfavided adequate infaftnation and detailed statemetAs ha-,Xe been filed eeffiplying with all peftinerA fequifemeflts of this eade. The holders of such pefmit shall pfeeeed staff, will -e . „toil " Comments: J A. These are administrative provisions that are already addressed elsewhere in the code. B. Hawai`i County's version of this addition is consistent with the version adopted by Kauai County. See: §12-6 4(31), KCC. 5 Hawaii County Energy Code Bill Annotated Draft 11/27/19 (6) Subsection C202 of the International Energy Conservation Code is amended by adding the following new definitions to be appropriately inserted and to read as follows: "CODE OFFICIAL. The director of the department of public works of the County of Hawaii, the director's authorized representative, or other designated authority charged with the administration and enforcement of this code." "COOL ROOF. A cool roof is a roofing system that can deliver high solar reflectance, and high thermal emittance as specified in table C402.3." "HABITABLE SPACE. A space in a building for living, Sleeping, eating or cooking. Bathrooms, toilet rooms, closets, halls, storage or utilijY spaces and similar areas are not considered habitable spaces." "OCCUPIABLE SPACE.A room or enclosed space designed for human occupancy in which individuals congregate for amusement, educational or similar purposes or in which occupants are engaged at labor, and which is equipped with means of egress and light and ventilation facilities meeting the requirements of this code." "UNCONDITIONED FLOOR AREA. The horizontal projection of the floors associated with the unconditioned space." "UNCONDITIONED SPACE. An area, room or space that is enclosed within the building thermal envelope and is not directly nor indirectly heated or cooled." Comment: Hawaii County Justification: These definitions are added to clarify these terms. (7) Subsection C401.2 of the International Energy Conservation Code is amended to read as follows: "C401.2 Application. Commercial buildings shall comply with one of the following: 1. The requirements of ANSI/ASHRAE/IESNA 90.1. 2. The requirements of Sections C402 through C405. In addition, commercial buildings shall comply with Section C406 and tenant spaces shall comply with Section C406.11. 1. 3. The requirements of Sections C402.5, C403.2, C404, C405.2, C405.3, C405.5, C405.6 and C407. The building energy cost shall be equal to or less than 85 percent of the standard reference design building. Exception: For buildings 2,500 square feet or less with 4 tons of cooling or less where it is determined by the code official that the building configuration is 6 Hawaii County Energy Code Bill Annotated Draft 11127119 similar to that of a residential building-,the requirements in Sections R401.2.1 Tropical Zone shall be permitted to be used." Comments: A. Extends Tropical Zone provisions for small commercial projects with construction similar to that of a residential building. B. Larger commercial buildings or commercial buildings with significant cooling loads may have a similar configuration to a residential use but due to scale their use intensity cannot be compared to a single-family or duplex dwelling use. Limits would make it easier for the code official to be consistent in their acceptance of this exception. C. The intent to allow for a tropical zone provision as noted in comment A was for smaller residential type commercial projects. 2500 sf is tied to the square footage limits defined in the POINTS option of 8407, Furthermore, the 4-ton cooling limit was defined based on the State of Hawai`i Department of Health Administrative Rules Title 11-39. Section 11-39-6 provides an exemption to the requirement for a "Form-1 Permit"for a 4.25 ton cooling system. (8) Subsection C402.1.1 of the International Energy Conservation Code is amended to read as follows: "C402.1.1 Low-energy use buildings. The following low-energy use buildings, or portions thereof separated from the remainder of the building by building thermal envelope assemblies complying with this section, shall be exempt from the building thermal envelope provisions of Section C402. 1. Those with a peak design rate of energy usage less than 3.4 Btu/h•ft2 (10.7 W/m2) or 1.0 watt per square foot(10.7 W/m2) of floor area for space conditioning purposes. 2. [Those that do iiet eofilaift eonditioned spoee] Unconditioned space that does not contain occupiable space and/or habitable space. 3. Greenhouses. 4. Open park pavilions where there is no enclosed space." Comments: A. State Justification: The amended language ensures that habitable space, even if unconditioned, will be covered by the provisions of the energy code to increase occupant comfort and reduce the possibility of installing air conditioning in the future. See State ECC at§3-181.1-8, HAR, Kauai County at§12-6.4(11), KCC, and Maui County at§16.168.C402.1.1, MCC. 7 Hawaii County Energy Code Bill Annotated Draft 11127119 B. Hawai`i County adds new definitions of"unconditioned space, " "occupiable space, " and "habitable space" in paragraph (b)(6) of this bill. C. Open park pavilions with no enclosed spaces are exempt from building thermal envelope requirements. (9) Table C402.1.3 from the International Energy Conservation Code is deleted in its entirety and replaced with the following: "TABLE C402.1.3 OPAQUE THERMAL ENVELOPE INSULATION COMPONENT MINIMUM_REQUIREMENTS,R-VALUE METHOD"- CLIMATE ZONE 1 CLIMATE ZONE 1 All other Group R Roofs Insulation entirely R-IOci R-12.5ci above roof deck Metal building R-30 or R-19 with cool roof R-30 or R-19 with cool roof Attic and other R-30 or R-19 with cool roof R-30 or R-19 with cool roof Walls, above trade Mass R-5.7cid R-5.7cid Metal building R-13 +R-6.5ci R-13 +R-6.5ci Metal framed R-13 +R-5ci R-13 +R-5ci Wood framed and other R-13 +R-3.8ci or R-20 R-13 +R-3.8ci or R-20 Walls, below grade Below-grade wall NR NR Floors Mass NR NR Joist/framing NR NR 8 Hawaii County Energy Code Bill Annotated Draft 11/27/19 Slab-on-grade floors Unheated slabs NR NR Heated slabs R-7.5 for 12" below R-7.5 for 12"below Opaque doors Nonswinging R-4.75 R-4.75 For SI: 1 inch=25.4 mm, 1,pound per square foot=4.88 kg/M2, 1 pound per cubic foot= 16 kg/m'. ci=Continuous insulation,NR=No requirement,LS=Liner system. a. Assemblydescriptions escriptions can be found in ANSI/ASHRAE/IESNA Appendix A. b. Where using R-value compliance method,a thermal spacer block shall be provided,otherwise use the U-factor compliance method in Table 0402.1.4. c. Cool roof is defined as a roof with three-year aged solar reflectance of 0.55 and 3-year aged thermal emittance of 0.75 or 3-year aged solar reflectance index of 64. d. R-5.76 is allowed to be substituted with concrete block walls complying with ASTM C 90, ungrouted or partially grouted at 32 inches or less on center vertically and 48 inches or less on center horizontally,with ungrouted cores filled with materials having maximum thermal conductivity of 0.44 Btu-in/h-f OF. See Section 0402.2.3." Comments: A. Revised table to include only climate zone I requirements. B. State Justification: Commercial buildings must have Cool Roof Rating Council compliant reflective roofs which significantly reduce the need for insulation, especially in Hawai`i's mild climate. Reducing required insulation by 50%significantly reduces construction costs while minimally increasing interior temperatures. C. See: Maui County at§16.16B.C402, MCC, and Kauai County at§12- 6.4(12), KCC. (10) Subsection C402.2.3 of the International Energy Conservation Code is amended to read as follows: "C402.2.3 Thermal resistance of above-grade walls. The minimum thermal resistance (R-value) of materials installed in the wall cavity between framing members and continuously on the walls shall be as specified in Table C402.1,3, based on framing type and construction materials used in the wall assembly. Exceptions: Continuous insulation for wood, metal framed, and mass walls are not required when at least one of the following conditions is met: 1. Walls have a covering with a reflectance of> 0.64. 2. Walls have overhangs with a projection factor equal to or greater than 0.3. The projection factor is the horizontal distance from the surface of the wall 9 Hawaii County Energy Code Bill Annotated Draft 11127119 to the farthest most point of the overhang divided by the vertical distance from the first floor level to the bottom most point of the overhang 3. Concrete, CMU, and similar mass walls are 6 inches or greater in thickness. The R-value of integral insulation installed in concrete masonry units shall not be used in determining compliance with Table C402.1.3. "Mass walls" shall include walls: 1. Weighing not less than 35 psf(170 kg/m ) of wall surface area. 2. Weighing not less than 25 psf(120 kg/m2) of wall surface area where the material weight is not more than 120 pcf(1900 kg/m 3). 3. Having a heat capacity exceeding 7 Btu/ft2• OF (144 kJ/m2• K). 4. Having a heat capacity exceeding 5 Btufft2• OF (103 kJ/m2• K), where the material weight is not more than 120 pcf(1900 kg/M3).,, Comments: A. State Justification: Modeling analysis shows that R-13 is the most impactful level of insulation for buildings and that removing continuous insulation on steel frame walls does not significantly impact whole building energy use. Adding shading to the wall system with a projection factor of at least 0.3 eliminates the need for continuous insulation in exterior wall systems resulting in an energy equivalent installation. In a tropical climate, the impact of wall insulation is diminished for commercial buildings with more importance placed on roof insulation and window solar heat gain coefficient(SHGC). Envelope trade-offs for residential construction can be extrapolated to commercial construction for wall systems allowing the trade-off for a projection factor on wall systems to work for both residential and commercial buildings. Adding reflective coatings on wall systems is also an effective trade-off for continuous insulation in residential exterior wall systems. As with the projection factor, this trade-off can be transferred to commercial buildings as an energy neutral trade-off A reflective coating trade-off for continuous insulation is appropriate for commercial wall systems by providing an energy neutral trade-off The full analysis is contained in the "Analyses and proposal of Hawai`i amendments to the 2015 International Energy Conservation Code, " dated May 2016 See: State ECC at§3-181.1-9, HAR. B. Maui County Justification:Additionally, exception 3 will reduce the footprint of the structure when using mass wall, which will reduce construction costs. See: §16.1613.C402.2.3, MCC. C. Kauai County also incorporated change at§12-6.4(13), KCC. 10 Hawaii County Energy Code Bill Annotated Draft 11127119 {l l) Table C402.4 from the International Energy Conservation Code is deleted in its entirety and replaced with the following: "TABLE 0402.4 BUILDING ENVELOPE FENESTRATION MAXIMUM U-FACTOR AND SHGC REQUIREMENTS - CLIMATE ZONE 1 CLIMATE ZONE 1 Vertical fenestration U-factor Fixed fenestration 0.50 Operable fenestration 0.65 Entrance doors 1.10 SHGCb Orientation' SEW N PF <0.2 0.25 0.33 0.2 <PF <0.5 0.30 0.37 PF> 0.5 0.40 0.40 Skylights U-factor 0.75 SHGC 0.35 NR=No requirement,PF=Projection factor. a. "N"indicates vertical fenestration oriented within 45 degrees of true north. "SEW" indicates orientations other than"N." For buildings in the southern hemisphere,reverse south and north. b. Exception: Jalousie windows are exempt from SHGC requirements." Comments: A. Revised table to include only climate zone I requirements. B. State Justification: .jalousie windows are popular in Hawai`i as an extremely effective means ofpassively cooling buildings by reducing or eliminating the need for air conditioning. The SHGC of the individual jalousie blades can be slightly improved, but only at great expense and the 11 Hawaii County Energy Code Bill Annotated Draft 11/27/19 improved blades would still befar from code compliance. Given Hawai'i's mild climate, the energy impact of reducing or eliminating air conditioning may far exceed the impact of additional heat gain. C. Hawai'i County Justification: as written, the State ofHawai'i does not qualify for the north exception. By removing the latitude requirement, Hawai'i County allows the exception. (12) A new subsection C402.4.3.5 is added to the International Energy Conservation Code to read as follows: "C402.4.3.5 Area-weighted SHGC. In commercial buildings, an area-weighted average of fenestration products shall be permitted to satisfy SHGC requirements. Exception: Jalousie windows are exempt from SHGC requirements." Comments: A. State Justcation: Modeling by the National Renewable Energy Laboratory (N-REL) indicated that shading fenestration was as effective as solar heat gain coefficient(SHGC) requirements in Hawai'i's mild climate. Area weighting allows trade-offs between fenestration SHGC allowing a higher SHGC to be installed on the North elevation and offsetting that with lower SHGC requirements for windows on the East, West and South. See: State ECC at§3-181.1-10, HAR. B. State Justification.- Jalousie windows are popular in Hawaii as an extremely effective means of passively cooling buildings by reducing or eliminating the need for air conditioning. The SHGC of the individual jalousie blades can be slightly improved, but only at great expense and the improved blades would still befar from code compliance. Given Ilawai'i's mild climate, the energy impact of reducing or eliminating air conditioning may far exceed the impact of additional heat gain. (13) Subsection C402.5 of the International Energy Conservation Code is amended to read as follows: "C402.5 Air leakage-thermal envelope (Mandatory). The thermal envelope of buildings shall comply with Sections C402.5.1 through C402.5.8, or the building thermal envelope shall be tested in accordance with ASTM E 779 at a pressure differential of 0.3 inch water gauge (75 Pa) [E)f an equivalent method approved by4he eode offieial] and deemed to comply with the provisions of this section when the tested air leakage rate of the building thermal envelope is not greater than 0.40 cfm/ft2 (0.2 Us - m2). Where compliance is based on such testing, the building shall also comply with Sections C402.5.5, C402.5.6 and C402.5.7." 12 Hawaii County Energy Code Bill Annotated Draft 11127119 Comment: In the International Energy Conservation Code the blower door test is a way to avoid tested and labeled fenestration. This would allow for site built windows and other high performance custom solutions. (14) A new subsection 0403.2.4.2.4 is added to the International Energy Conservation Code to read as follows: "C403.2.4.2.4 Door switches. Opaque and Mass doors opening to the outdoors in hotel and motel sleeping units, guest suites, and time-share condominiums, shall be provided with controls that disable the mechanical cooling or reset the cooling setpoint to 90°F or greater within five minutes of the door opening. Mechanical cooling may remain enabled if the outdoor air temperature is below the space temperature." Comment: State Justification: This change will require automatic controls that reset the cooling system temperature in a hotel and motel sleeping unit, guest suites and time share condominiums when doors to the outdoors are let open. A similar requirement is contained in the American Society of Heating and Air- Conditioning Engineers (ASHRAE) 90.1-2013 Section 6.5.10. Research indicates that there is a potential for significant savings when in-room energy management systems are employed. A study by Pacific Gas and Electric as well as research by Magnum Energy Solutions,found that key card energy control systems provided an estimated savings of 35% - 45%per room. Additionally,prior research conducted for the State of Hawai`i indicated that occupancy-based guest room controls could provide at least 5%savings for the entire hotel. A study conducted in 2002 by Jeff Stein of Taylor Engineering and created for the California Statewide Utility Codes and Standards Program estimated savings of almost 60%for operable windows andlor doors with switches versus operable windows andlor doors without switches. The full analysis is contained in the "Analyses and Proposal of Hawaii Amendments to the 2015 International Energy Conservation Code. " See: State ECC at§3-181.1-11, HAR. 13 Hawaii County Energy Code Bill Annotated Draft 11127/19 (15) Subsection C405.2 of the International Energy Conservation Code is amended to read as follows: "C405.2 Lighting controls (Mandatory). Lighting systems shall be provided with controls as specified in Sections C405.2.1, C405.2.2, C405.2.3, C405.2.4 and 0405.2.5. Exceptions: Lighting controls are not required for the following: 1. Areas designated as security or emergency areas that are required to be continuously lighted. 2. Interior exit stairways, interior exit ramps and exit passageways. 3. Emergency egress lighting that is normally off. 4. Spaces where the designed lighting power densities are less than 70% of the lighting power densities specified in Table C405.4.2(1) and Table 0405.4.2(2)." Comments: A. Hawai`i County's version is consistent with the version adopted by Kauai County. See: x'12-6.4(16), KCC. B. State Justification: Electrical engineers, including speakers at the 2017 National Energy Codes Conference, indicate that compliance with the lighting controls are difficult and may result in non-compliance. By reducing lighting power density, a 40% energy savings is realized while reducing design, installation and maintenance costs. Including Section C405.1 (occupant sensor controls) is the simplest, most cost effective and most easily maintained control system. Including C405.2.4 (specific application controls) is necessary to cover control of hotel and motel guest room lighting as tourism is ubiquitous in Hawai`i. Studies indicate that 85% of the savings in lighting is attributable to the LED sources, and 15% to the controls. (16) Subsection C405.2.4 of the International Energy Conservation Code is amended to read as follows: "C405.2.4 Specific application controls. Specific application controls shall be provided for the following: 1. Display and accent light shall be controlled by a dedicated control that is independent of the controls for other lighting within the room or space. 2. Lighting in cases used for display case purposes shall be controlled by a dedicated control that is independent of the controls for other lighting within the room or space. 3. Hotel and motel sleeping units [a-Rd]s guest suites, and time-share condominiums shall have a master control device that is capable of 14 Hawaii County Energy Code Bill Annotated Draft 11/27119 automatically switching off all installed luminaires and switched receptacles within 20 minutes after all occupants leave the room. Exception: Lighting and switched receptacles controlled by captive key systems. 4. Supplemental task lighting, including permanently installed under-shelf or under-cabinet lighting, shall have a control device integral to the luminaires or be controlled by a wall-mounted control device provided that the control device is readily accessible. 5. Lighting for nonvisual applications, such as plant growth and food warming, shall be controlled by a dedicated control that is independent of the controls for other lighting within the room or space. 6. Lighting equipment that is for sale or for demonstrations in lighting education shall be controlled by a dedicated control that is independent of the controls for other lighting within the room or space." Comment: State Justification: The current International Energy Code language only includes a master control device for hotel and motel sleeping units and guest suites. Time share condominiums are added to the requirements because they have the same transient use pattern as a hotel and motel overnight room and the energy savings potential will be similar. See: State ECC at§3-181.1-12, HAR. (17) Anew subsection C405.10 is added to the International Energy Conservation Code to read as follows: "C405.10 Sub-metering (Mandatory). In new buildings with tenants, metering shall be collected for the entire building and individually for each tenant occupying 1,000 ft' (total enclosed and unenclosed) (93 m3) or more. Tenants shall have access to data collected for their space. A tenant is defined as "one who rents or leases from a landlord." Comments: A. State Justification: Numerous studies indicate that sub-metering, combined with tenant access to consumption data, results in substantial energy use reduction and is cost effective. See: State ECC at§3-181.1-13, TZAR. B. Hawai`i County's version of this proposed change is consistent with the version adopted by the State. See: State ECC at§3-181.1-13, HAR. 15 Hawaii County Energy Code Bill Annotated Draft 11/27/19 8) Subsection C406.3 of the International Energy Conservation Code is amended to read as follows: "C406.3 Reduced lighting power density. The total interior lighting power(watts) of the building shall be determined by using [90] 80 percent of the lighting power values specified in Table C405.4.2(1)times the floor area for the building types, or by using [90] 80 percent of the interior lighting power allowance calculated by the Space-by-Space Method in Section C405.4.2." Comment: State Justi/ication: The current code was written in 2014, allowing Haitz's law to have considerable effect. Reducing lighting power density also reduces construction costs by requiring fewer fixtures. (19) Subsection C408.2 of the International Energy Conservation Code is amended to read as follows: "C408.2 Mechanical systems and service water-heating systems commissioning and completion requirements. [Pfief to the final meehanieal and plumbing inspections ] The registered design professional or approved agency shall provide evidence of mechanical systems commissioning and completion in accordance with the provisions of this section to the owner or owner's authorized agent. Construction document notes shall clearly indicate provisions for commissioning and completion requirements in accordance with this section and are permitted to refer to specifications for further requirements. Copies of all documentation shall be given to the owner or owner's authorized agent and made available to the code official upon )fill request in accordance with Sections C408.2.4 and C408.2.5. Exceptions: The following systems are exempt: I. Mechanical systems and service water heater systems in buildings where the total mechanical equipment capacity is less than 480,000 Btu/h(140.7 kW) cooling capacity and 600,000 l3tu/h(175.8 kW) combined service water-heating and space-heating capacity. 2. Systems included in Section C403.3 that serve individual dwelling units and sleeping units." Comment: Maui Justification: The registered design professional is responsible for the mechanical systems and service water-heating systems commissioning. The required documents should be submitted to the owner or owner's representative for their information and record See: x°16.168.C408.2, MCC. 16 Hawaii County Energy Code Bill Annotated Draft 11/27/19 (20) Subsection C408.2.4.1 of the International Energy Conservation Code is deleted in its entirety. «[C488.2.4.1 ,e ptanee of report. Buildings, of ,.ffiens thereof, shall not be that the building owner of 9 Commissioning Re „..x.]99 l.i Comment: Maui Justification: Verification of submittal of the Preliminary Commissioning Report should be coordinated between the registered design professional and the owner or owner's representative. See: §16.16B.C408.2.4.1, MCC. (21) Subsection C408.3.1 of the International Energy Conservation Code is amended to read as follows: "C408.3.1 Functional Testing. [Prig to passing final eetiori the] The registered design professional shall provide to the owner or owner's representative evidence that the lighting control systems have been tested to ensure that control hardware and software are calibrated, adjusted,programmed and in proper working condition in accordance with the construction documents and manufacturer's instructions. Functional testing shall be in accordance with Sections C408.3.1.1 and C408.3.1.2 for the applicable control type." Comment: Maui Justification: This amendment simplifies and streamlines the functional testing process. See: §16.16B.C408.3.1, MCC. (22) Subsection C501.4 of the International Energy Conservation Code is amended to read as follows: "C501.4 Compliance.Alterations, repairs, additions and changes of occupancy to, or relocation of, existing buildings and structures shall comply with the provisions and regulations for alterations, repairs, additions and changes of occupancy or relocation, [ > International Fire Code, Mter-national Fuel Gas. Code,International Afeehanieal Code,Intepnoti Plumbing Code,biternational Property Alaintenanee 9 :International Private Sewage Dirv,age Di oral Code and NFP n 7n] as adopted by the building official. " Comment: State Justification: The proposed amendment strikes language requiring existing building projects to comply with the suite of International codes when these codes 17 Hawaii County Energy Code Bill Annotated Draft 11/27/19 may not have been adopted by the local jurisdiction. This amendment is consistent with Hawaii Revised Statutes§107-25. See: State ECC at§3-181.1- 1 4, HAR. (23) Subsection C503.3.1 of the International Energy Conservation Code is amended to read as follows: "C503.3.1 Roof replacement.Roof[reploeement-s shall eemply with Table 0402.1.3 of C402.1.4 whefe the existing foof assembly is paft of the building thermal eHvel6pe and eatilains insulatian efttifely above the roof deck-.] replacement of uninsulated roofs shall include at least one of the following: 1. Energy Star compliant roof covering; 2. Radiant barrier-, or 3. Attic ventilation via solar attic fan(s), or ridge ventilation, or gable ventilation." Comment: State Justification: The Roofing Contractors ofHawai'i reported that the 2015 JECC code requirement for insulating existing roofs would double the cost. This amendment provides an alternative compliance path which addresses the cost issue. (24) Subsection 8101.1 of the International Energy Conservation Code is amended to read as follows: "R101.1 Title. This code shall be known as the Lfl Energy Conservation Code [of NAME OF JUMSDICTION , and shall be cited as such. [It is fefeffed 11-1 herein as "this eode."] "This code"when used within the International Energy Conservation Code as incorporated by reference herein, means the Energy Conservation Code of Hawaii County." Comments: A. Conformed with paragraph (1) of this bill that amends subsection C101.1 of the International Energy Conservation Code. B. Standard language. (25) Subsection R103.1 of the International Energy Conservation Code is amended to read as follows: "R103.1 General. [ , teehnieal fepofts and othef suppeffing data shall be submitted in ane of fne —.- —4- --eh application for a peffflit. The 18 eenstfeefieii doetiffients and teehnieal fepafts shall be pfepafed by a r-egistefed desig pr-ofessional w-hefe fequifed by the staltAes of the j urisdietion in w-hieh the pfE)j eet iS. Hawaii County Energy Code Bill Annotated Draft 11/27/19 to be eansiftfeted. Whefe speeial eonditions exist, the eede offieial is a-uthefized to .equitefteeessafyeanstetiondoethtiientstobepfepa„ea byafegistefed,–'---i— Professional, Fxeeptiofut The eode offieial is atAhefized to waive the requirement construction documents of other supporting data if the eede offieial detefmines they afe not fleeessai7j,to eenfifm eemplianee with this ee4e-.] Construction documents and other supporting data shall be submitted to indicate compliance with this code. The construction documents shall be prepared, designed, approved, and observed by a duly registered licensed professional as required by chapter 464, Hawaii Revised Statutes and in accordance with the provisions of chapter 5, Hawaii County Code. The licensed professional shall certify via a signed statement on the plans,that the project complies with this code. Exception: Any building, electrical, or plumbing work that is not required to be prepared, designed, approved, or observed by a licensed professional architect or engineer pursuant to chapter 464, Hawaii Revised Statutes, shall be certified by the owner." Comment: State Justification: Standard administrative code language. (26) Subsections R103.3.2 and R103.3.3 of the International Energy Conservation Code are deleted in their entirety. "[R103.3.2 P . . rovals. This eede shall not feqtfife ehafiges in the 0,20fistflip--fli.Affl. ..A., eenstf etion of designated eee"aney of a stfue which a lawful permit has been heretofore issued of othefwise lawfially auther-iZed, and the eenstfuefieii of whieh has been pufsued in good faith within 190 days afte the eff-eetive date of this eade and has flat been abandoned. R103.3.3 Phased approval. The eede 4eial shall have the au�ffiafity to pefmit fef the eenstfuefien of paft of an energy eenservation systern before-th construction documents for the entire system have been s4ffiWed er- provided adequate infefmation and de4ailed statements have been filed complying A4th all peffinent requirements of this code. The holders of stieh peffflit shall preeee at theif ew7n risk withet4 asstifanee that the pefmit for the efttife ener-gy eonsefvati systeffl)A411 be gfanted.]" Comment: These are administrative provisions that are already addressed elsewhere in the code. See: Kauai County§12-64(26), KCC. 19 Hawaii County Energy Code Bill Annotated Draft 11/27/19 (27) Subsection R202 of the International Energy Conservation Code is amended by adding the following new definitions to be appropriately inserted and to read as follows: "CODE OFFICIAL. The director of the department of public works of the County of Hawaii, the director's authorized representative, or other designated authority charized with the administration and enforcement of this code." "COOL ROOF. A cool roof is a roofing system that can deliver high solar reflectance, and high thermal emittance as specified in table C402.3." "HABITABLE SPACE.A space in a building for living, sleeping, eating or cooking, Bathrooms,toilet rooms, closets, halls, storage or utilily spaces, garages or eq-Torts, and similar areas are not considered habitable spaces." "OCCUPIABLE SPACE.A room or enclosed space designed for human occupancy in which individuals congregate for amusement, educational or similar purposes or in which occupants are engaged at labor, and which is equipped with means of egress and light and ventilation facilities meeting the requirements of this code." "UNCONDITIONED FLOOR AREA. The horizontal proiection of the floors associated with the unconditioned space." "UNCONDITIONED SPACE. An area, room or space that is enclosed within the building thermal envelope and is not directly nor indirectly heated or cooled." Comment. Hawai'i County Justification.- These definitions are added to clarithese terms. fy (28) Subsection 8401.2 of the International Energy Conservation Code is amended to read as follows: "R401.2 Compliance. Projects shall comply with one of the following: 1. Sections [R404-] R401.3 through R404. 2. Section R405 and the provisions of Sections R401 through R404 labeled "Mandatory." 3. An energy rating index (ERI) approach in Section R406. 4. The tropical zone requirements in Section R401.2.1 and R401.3." Comments: A. Clarifies the need for a certificate for tropical zone compliance indicating materials used for compliance. This allows owners and future owners to be aware of exceptions granted throughout the code and amendments. 20 Elawai`i County Energy Code Bill Annotated Draft 11/27/19 B. State Justification: The amendment provides clarifying language on the options available to the code user and specifically references the Tropical zone requirements as an option. See: State ECC at§3-181-17, HAR. (29) Subsection R401.2.1 of the International Energy Conservation Code is amended to read as follows: "R401.2.1 Tropical zone. Residential buildings in the tropical zone at elevations below [2,400 feet(731.5 ra)] 5,000 feet above sea level shall be deemed to comply with this chapter where the following conditions are met: 1. Not more than one-half of the [oeeupiedspa e] dwelling unit area is air conditioned. Comment: Hawai`i County speck adjustment to include majority of communities to allow for compliance via tropical zone. 2. The [occupied spe] dwellina unit is not heated. Comments: A. Hawai`i County's version is consistent'With the version adopted by the State, Kauai County, and Maui County. See: State ECC at§3-181-18, HAR, §12-6.4(31), KCC, and §16.16B.R401.2.1, MCC. B. State Justification: Occupied space is changed to dwelling unit because occupied space includes all buildings within a project e.g. an unconditioned garage that would be considered out of the scope of this code provision. Dwelling unit is a more appropriate term. See: State ECC at§3-181-18, HAR. 3. Solar, wind, or other renewable energy source supplies not less than [90] 90 percent of the energy for service water heating. Exception: A water heating device as approved via Solar Hot Water Heater Variance by the Department of Business Economic Development & Tourism Hawaii State Energy Office. Comments: A. Hawai`i County's version is consistent with the version adopted by the State, Kauai County, and Maui County. See: State ECC at§3-181-18, HAR, §12-6.4(31), KCC, and §16.16B.R401.2.1, MCC 21 Hawaii County Energy Code Bill Annotated Draft 11/27/19 B. State Justification: Solar water heater systems per x'196-6.5 Solar water heater systems required for new single-family residential construction Hawai`i Revised Statutes specified to be consistent with state legislation. See: §16.16B.R401.2.1, MCC. 4. Glazing in [ ] dwelling its shall have a maximum solar heat gain coefficient [of less than of a to n 4 n ^r has an ever-hang witht� „t,^ f„t^ a t^ .,tef t�, n �n] as specified in Table t"�ir^ . R401.2.1. Table 401.2.1 Vertical Fenestration Glazing SHGC Requirements Projection Factor (pf) of overhang from base of average vertical SHGC fenestrationlazin sill* <0.30 0.25 0,30-0.49 0.40 > 0.50 N/A *Exceptions. a. North-facing vertical fenestrationlg azing with pf>0.20 are exempt from SHGC requirements. Overhangs shall extend 2 feet on each side of vertical fenestration lazing or to nearest wall,whichever is less. b. Jalousie windows are exempt from SHGC requirements. c. "N"indicates vertical fenestration oriented within 45 degrees of true north. "SEW"indicates orientations other than"N". Comments: A. State Justification:A SHGC projection factor trade-off is provided for the vertical fenestration SHGC to account for the shading effects of overhangs. This provides an energy neutral trade-offSee: State ECC at§3-181-18, HAR. B. State Justification: Jalousie windows are popular in Hawai`i as an extremely effective means of passively cooling buildings by reducing or eliminating the need for air conditioning. The SHGC of the individual jalousie blades can be slightly improved, but only at great expense and the improved blades would still be far from code compliant. Given Hawaii's mild climate, the energy impact of reducing or eliminating air conditioning may far exceed the impact of additional heat gain. C. Hawai`i County Justification: Exception (c) is consistent with the commercial portion of the IECC (Table C402.4) and paragraph (10) in the proposed amendments but allows a 22 Hawaii County Energy Code Bill Annotated Draft 11/27/19 lower SHGC for residential fenestration facing north. It further defines "N" or north facing windows to allow dwelling orientation to the north-east, or north-west up to 45 degrees, either way. 5. Skylights in dwelling units shall have a maximum U-factor as specified in Table R402.1.2. Comments: A. Hawai`i County's version of this addition is consistent with the version adopted by the State, Kauai County, and Maui County. See: State ECC at§3-181-18, HAR, §12-6.4(31), KCC, and §16.16B.R401.2.1, MCC. B. State Justification: No thermal or SHGC requirements for skylights were included in Tropical Zone requirements. The skylight provision addition provides a link to the prescriptive requirements in the 2015 IECC. Installing lower SHGC skylights will reduce the cooling load in the space and will increase occupant comfort. See: State ECC at§3-181-18, HAR. [-5]6. Permanently installed lighting is in accordance with Section R404. Comment: Hawai`i County's version of this addition is consistent with the version adopted by the State, Kauai County, and Maui County. See: State ECC at§3-181-18, HAR, §12-6.4(31), KCC and §16.16B.R401.2.1, MCC. [ . The ex4eriof roof suffaee eempliesMth one of the options in Table G402.3 Of the foogeeiling has insulation with an R value of R 15 of gfea4ef. if , attics above the insulation afe vei4ed and attics below the ifisulatieft afe UftVented,] 7. [Roof su f non have a minimuffi slope of 1/4inch pef foot fuft. Th ffl.nis.hed roof does not have water n ulat o . s.] The roof/ceiling complies with one of the following options: A. Comply with one of the roof surface options in Table C402.3 and install R-13 insulation orreg ater. B. Install R-19 insulation orrg eater. If present, attics above the insulation are vented and attics below the insulation are unvented. Exception: The roof/ceiling assembly is permitted to comply with Section R407. 23 Hawaii County Energy Code Bill Annotated Draft 11/27/19 Comments: A. Ilawai'i County's version of this addition is consistent with the version adopted by the State, Kauai County, and Maui County. See: State ECC at§3-181-18, HAR, §12-6.4(31), KCC, and §1616B.R401.2.1, MCC. B. State Justification: R-13 rooflceiling insulation with the addition of a cool roof membrane or R-19 insulation only performs equally based on analysis. The analysis shows significant savings using insulation in addition to a cool roof membrane instead of relying on a cool roof membrane only. See: State ECC at§3-181-18, HAR. 8. Operable fenestration provides ventilation area equal to not less than 14 percent of the floor area in each habitable room. Alternatively, equivalent ventilation of 2 air changes per hour is provided by a mechanical ventilation fan. Comment: Mechanical ventilation and 2 air changes per hour are consistent with paragraph 5-71(7), Hawai'i County Code, that amends§310.3.5(c) of the International Building Code, 2006 Edition, relating to Ventilation. 9. Bedrooms with exterior walls facing two different directions have operable fenestration on exterior walls facing two different directions. Comment: Ilawai'i County's version of this addition is consistent with the version adopted by the State and Kauai County. See: State ECC at§3-181-18, HAR and§12-6.4(31), KCC. 10. Interior doors to bedrooms are capable of being secured in the open position. Comment: Hawai'i County's version of this addition is consistent with the version adopted by the State, Kauai County, and Maui County. See: State ECC at§3-181-18, HAR, §12-6.4(31), KCC, and §16 1 6B.R401.2.1, MCC. 24 Hawaii County Energy Code Bill Annotated Draft 11/27/19 11. A ceiling fan [of].,ceiling fan rough-in, or whole-house fan is provided for bedrooms and the largest space that is not used as a bedroom. Comment: Hawai'i County's version of this addition is consistent with the version adopted by Kauai County. See: §12-6.4(31), KCC. 12. Walls, floors, and ceilings separating air conditioned spaces from non-air conditioned spaces shall be constructed to limit air leakage in accordance with the requirements in Table R402.4.1.1. Blower door test is optional." Comments: A. Hawai'i County's version of this addition is consistent with the version adopted by Maui County. See: §1616B.R401.2.1, MCC. B. State Justification:Air sealing between the air conditioned space and non-air conditioned space is important to keep the space conditioning in the areas where it was intended Sealing up assemblies between the two spaces will also reduce the possibility of moisture issues within the framed cavities. See: State ECC at§3-181-18, HAR. Comment regarding paragraph (29): Hawai'i County's version intentionally removed the following paragraphs from State ECC at§3-181-18, HAR: 8. Roof surfaces have a minimum slope of 114 inch per foot of run. The finished roof does not have water accumulation areas. 13. Jalousie windows shall have an air infiltration rate of no more than 1.2 cfm per square foot (6.1 Llslm2). 14. Walls,floors and ceilings separating air conditioned spaces from non-air conditioned spaces shall be constructed to limit air leakage in accordance with the requirements in Table R402.4.1.1, (30) Subsection R401.3 of the International Energy Conservation Code is amended to read as follows: "R401.3 Certificate (Mandatory).A permanent certificate shall be completed by the builder or registered design professional and posted on a wall in the space where the furnace is located, a utility room or an approved location inside the building. Where located on an electrical panel, the certificate shall not cover or obstruct the visibility of the circuit directory label, service disconnect label or other required labels. The certificate shall [list]: 1. List the predominant R-values of insulation installed in or on ceiling/roof, walls, [fatifidation (slab, basemei4 wall, efaMspaee wall and floor-) and ducts 25 Hawaii County Energy Code Bill Annotated Draft 11/27/19 outside conditioned spaces; U-factors for fenestration and the solar heat gain coefficient(SHGC} of fenestration, and the results from any required duct system and building envelope air leakage testing done on the building. Where there is more than one value for each component, the certificate shall list the value covering the largest area. [The eei4i f ease shall pis ] 2. List the types and efficiencies of heating, cooling and service water heating equipment. Where a gas-fired unvented room heater, electric furnace or baseboard electric heater is installed in the residence, the certificate shall list "gas-fired unvented room heater," "electric furnace" or "baseboard electric heater," as appropriate. An efficiency shall not be listed for gas-fired unvented room heaters, electric furnaces or electric baseboard heaters. 3. Indicate which areas have been designed and constructed as conditioned or unconditioned sbace. 4. Include the following text: "The addition of mechanical coolie or r heating to an unconditioned space requires a building permit. The addition of cooling without proper design and construction can have adverse health safety, and conservation consequences."" Comments: A. Clarifies the need for a certificate for tropical zone compliance indicating materials used for compliance. This allows the owners and future owners to be aware of exceptions granted throughout the code and amendments. B. State Justification: The amendment provides clarifying language on the options available to the code user and specifically references the Tropical zone requirements as an option. See: State ECC at§3-181-17, HAR. (3 1) Subsection R402.1 of the International Energy Conservation Code is amended to read as follows: "R402.1 General (Prescriptive). The building thermal envelope shall meet the requirements of Sections R402.1.1 through 8402.1.5. Exception: The following low-energy buildings, or portions thereof, separated from the remainder of the building by building thermal envelope assemblies complying with this section shall be exempt from the building thermal envelope provisions of Section R402. 1. Those with a peak design rate of energy usage less than 3.4 Btulh • ft2 (10.7 WIm2} or 1.0 watt (10.7 Wlm2) of floor area for space- conditioning purposes. 26 Hawai'i County Energy Code Bill Annotated Draft 11/27/19 2. [These that do not eontain eenditionedspaee.j Unconditioned space that does not contain habitable space. I Unconditioned dwellings with enclosed habitable areas less than 1 100 square feet." 4. Dwellings with-permitted, off-grid, self sUplyingphotovoltaic with battery back up." Comments: A. Mawai`i County's version of this proposed change is consistent with the version adopted by the State and Maui County, exceptfor Exception 3, which Mawai`i County added. Exception 3 allows 1,100 square feet dwellings to be exempt from the building thermal envelope provisions to support affordable housing pursuant to section 11-7(b), Mawai`i County Code. See: State ECC at§3-181-19, MAR and§16.16B.R402.1, MCC. B. State Justification: The amended language ensures that habitable space, even if unconditioned, will be covered by the provisions of the energy code to increase occupant comfort and reduce the possibility of installing air conditioning in the future. See: State ECC at§3-181-19, MAR. C. Dwellings with permitted off-grid, self-supplying PV systems shall be exempt. 27 Hawaii County Energy Code Bill Annotated Draft 11/27/19 (32) TABLE R402.1.2 of the International Energy Conservation Code is deleted in its entirety and replaced with the following: "TABLE R402.1.2 INSULATION AND FENESTRATION REQUIREMENTS BY COMPONENT a WOOD CRAWL CLIMATE FENESTRATION SKYLIGHT GLAZED CEILING FRAME MASS FLOOR BASEMENT SLAB SPACE ZONE -6--FACTOR' —U-FACTOR FENESTRATION R-VALUE WALL WALL R-VALUE WALL R- WALL SHGC h,',9 R-VALUE d R-VALUE R-VALUE VALUE R-VALUE —�f &DEPTH NR 0.75 0.25 30 13 3/4 0 0 0 0 For SL I foot—304.8 mm a. R-values are minimums. U-factors and SHGC are maximums.When insulation is installed in a cavity which is less than the label or design thickness of the insulation,the installed R-value of the insulation shall not be less than the R-value specified in the table. b. The fenestration U-factor column excludes skylights.The SHGC column applies to all glazed fenestration.Exception:Skylights may be excluded from glazed fenestration SHGC requirements in climate zones I through 3 where the SHGC for such skylights does not exceed 0.30. C. Exception:If fenestration have overhangs with specified in Table R401.2.1. d, R402.1.2 and R402.2 allow use of R407. e. The second R-value applies when more than half the insulation is on the interior of the mass wall. f Exception:R-value for mass walls are not required if.mass walls have a covering with reflectance of>0.64�mass walls have overhangs with a projection factor equal to or greater than 0.3.CMU or similar mass walls are 6 inches or greater in tbickness, g. Exception:Jalousie windows are exempt from SHGC requirements." Comments: Hawai'i County's version makes the following changes: A. Revised table to include only climate zone I requirements. B. Reduces the Floor R-Value reduced to zero to reflect Hawaii's climate. C. Adds note "c" to allow overhang projection factors to allow exceptions to the glazed fenestration SHGC. D. Adds notes "e" and 'f' because the previous version of the Energy Code did not have R-Value for mass walls. By not having this exemption mass walls will need to add another wall or layer to achieve the R-314 value. This would increase the overall floor area or reduce the usable interior floor area of the structure and increase cost of mass wall construction. E. Adds note "g" because jalousie windows are popular in Hawai'i as an extremely effective means of passively cooling buildings by reducing or eliminating the need for air conditioning. The SHGC of the individual jalousie blades can be slightly improved, but only at great expense and the improved blades would still befar from code compliance. Given Hawai'i's mild climate, the energy impact of reducing or eliminating air conditioning may far exceed the impact of additional heat gain. 28 Hawaii County Energy Code Bill Annotated Draft 11127119 (33) Subsection R402.1.2 of the International Energy Conservation Code is amended to read as follows: "R402.1.2 Insulation and fenestration criteria (Prescriptive). The building thermal envelope shall meet the requirements of Table R402.1.2, [wed 11V V off11111LLL t � +V zone specified ed ,,, rh,,, tet 3 Exception: Insulation values of above-grade walls and ceilings shall be permitted to comply with Section R407." Comments: A. Creates a clarification that insulation in walls and ceilings can also comply with the points option (see Section R407). Hawai`i County's version of this amendment is consistent with the version adopted by the State, Kauai County, and Maui County. See: State ECC at§3-181-20, HAR, §12-6.4(36), KCC, and x'16.168.R402.2, MCC, B. State Justification: The addition of a Points Option (see Section 8407) provides energy neutral trade-offs allowing efficiencies in the wall system to be traded-off with increased efficiency levels in other parts of the building. This will allow a prescriptive trade-offfor continuous insulation in metal framed walls to be traded off with reflective paint on the walls or shading the walls with an overhang. Full analysis and background information is contained in the "Analyses and Proposal of Hawaii amendments to the 2015 International Energy Conservation Code. " See: State ECC at§3-181-20, HAR. (34) Subsection R402.2 of the International Energy Conservation Code is amended to read as follows: "R402.2 Specific insulation requirements (Prescriptive). In addition to the requirements of Section R402.1, insulation shall meet the specific requirements of Sections R402.2.1 through R402.2.13. Exception: Above-grade walls and ceilings shall be permitted to comply with Section R407." Comments: A. Hawaii County's version of this amendment is consistent with the version adopted by the State, Kauai County, and Maui County. See: State ECC at§3-181-20, HAR, §12-6.4(36), KCC and §16.16B.R402.2, MCC. B. State Justification: The addition of a Points Option (see Section R407) provides energy neutral trade-offs allowing efficiencies in the wall system 29 Hawaii County Energy Code Bill Annotated Draft 11/27/19 to be traded-off with increased efficiency levels in other parts of the building. This will allow a prescriptive trade-off for continuous insulation in metal framed walls to be traded off with reflective paint on the walls or shading the walls with an overhang. Full analysis and background information is contained in the "Analyses and Proposal of Hawaii amendments to the 2015 International Energy Conservation Code. " See: State ECC at§3-181-20, HAR. (35) Subsection R402.2.5 of the International Energy Conservation Code is amended to read as follows: "R402.2.5 Mass walls, Mass walls for the purposes of this chapter shall be considered above-grade walls of concrete block, concrete, insulated concrete form (ICF), masonry cavity, brick(other than brick veneer), earth (adobe, compressed earth block, rammed earth) and solid timber/logs, or any other walls having a heat capacity greater than or equal to 6 Btu/ft2 x T (123 U/m2 x K). Exception: Insulation or R-value for mass walls, indicated in Table R402.1.2, is not required when at least one of the following conditions is met: 1. Walls have a covering with a reflectance of> 0.64. 2. Walls have overhangs with a-projection factor equal to or greater than 0.3. The projection factor is the horizontal distance from the surface of the wail to the farthest most point of the overhang divided by the vertical distance from the first floor level to the bottom most point of the overhang. 3. Concrete, CMU, and similar mass walls are 6 inches or greater in thickness." Comments: A. State ECC Justification: Alodeling analysis shows that R-13 is the most impacful level of insulation for buildings and that removing continuous insulation on steel frame walls does not significantly impact whole building energy use. Adding shading to the wall system with a projection factor of at least 0.3 eliminates the need for continuous insulation in exterior wall systems resulting in an energy equivalent installation. In a tropical climate, the impact of wall insulation is diminished for commercial buildings with more importance placed on roof insulation and window solar heat gain coefficient(SHGQ. Envelope trade-offs for residential construction can be extrapolated to commercial construction for wall systems allowing the trade-off for a projection factor on wall systems to work for both residential and commercial buildings. Adding reflective coatings on wall systems is also an effective trade-off for continuous insulation in residential exterior wall systems. As with the projection factor, this trade-off can be transferred to commercial 30 Hawaii County Energy Code Bill Annotated Draft 11/27/19 buildings as an energy neutral trade-off A reflective coating trade-off for continuous insulation is appropriate for commercial al wall systems by providing an energy neutral trade-off The full analysis is contained in the "Analyses and proposal of Hawaii amendments to the 2015 International Energy Conservation Code, " dated May 2016 See: State ECC at§3-181-9, HAR. B. The addition of exception 3 will reduce the footprint of the structure when using mass wall, which will reduce construction costs. (36) Subsection R402.3.2 of the International Energy Conservation Code is amended to read as follows: "R402.3.2 Glazed fenestration SHGC. Fenestration shall have a maximum solar heat gain coefficient as specified in Table R402.1.2. An area-weighted average of fenestration products more than 50-percent glazed shall be permitted to satisfy the SHGC requirements. Exceptions: 1. Jalousie windows are exempt from SHGC requirements. 2. If fenestrations have overhangs with projection factors,the maximum solar heat gain coefficient shall be as specified in Table R401.2.1. Dynamic glazing shall be permitted to satisfy the SHGC requirements of Table R402.1.2 provided the ratio of the higher to lower labeled SHGC is greater than or equal to 2.4, and the dynamic glazing is automatically controlled to modulate the amount of solar gain into the space in multiple steps. Dynamic glazing shall be considered separately from other fenestration, and area-weighted averaging with other fenestration that is not dynamic glazing shall not be permitted. Exception: Dynamic glazing is not required to comply with this section when both the lower and higher labeled SHGC already comply with the requirements of Table 8402.1.2." Comments: A. Hawaii County's version of this proposed change is consistent with the version adopted by the State and Maui County, except for the additional Exceptions which Hawai'i County added See: State ECC at§3-181-21, HAR and§16.16B.8402.3.2, MCC B. State Justification: Jalousie windows are popular in Rawai'i as an extremely effective means of passively cooling buildings by reducing or eliminating the need for air conditioning. The SHGC of the individual jalousie blades can be slightly improved, but only at great expense and the improved blades would still be far from code compliance. Given 31 Hawaii County Energy Code Bill Annotated Draft 11127119 Hawai`i's mild climate, the energy impact of reducing or eliminating air conditioning may far exceed the impact of additional heat gain. C. State Justification: The added language links the allowance for an area weighted average SHGC with the specific SHGC requirement in Section R402.3.2. This change will clarify the requirement. See: State ECC at§3-181-21, HAR. D. Exception 2 was added to allow overhang projection factors to allow exceptions to the glazed fenestration SHGC. (37) Subsection R402.4.1.2 of the International Energy Conservation Code is amended to read as follows: "R402.4.1.2 Testing. The building or dwelling unit [shall] may be tested and verified as having an air leakage rate not exceeding five air changes per hour in Climate Zones 1 and 2, and three air changes per hour in Climate Zones 3 through 8. Testing shall be conducted in accordance with ASTM E 779 or ASTM E 1827,and reported at a pressure of 0.2 inch w.g. (50 Pascals). [Where r-equifed by the ,ode ffiei,T3 testing test shall be signed by the pa4y eenduefing the test and provided to the code ] Testing shall be performed at any time after creation of all penetrations of the building thermal envelope. During testing: 1. Exterior windows and doors, fireplace and stove doors shall be closed,but not sealed, beyond the intended weatherstripping or other infiltration control measures. 2. Dampers including exhaust, intake, makeup air, backdraft and flue dampers shall be closed,but not sealed beyond intended infiltration control measures. 3. Interior doors, if installed at the time of the test, shall be open. 4. Exterior doors for continuous ventilation systems and heat recovery ventilators shall be closed and sealed. 5. heating and cooling systems, if installed at the time of the test, shall be turned off. b. Supply and return registers, if installed at the time of the test, shall be fully open." Comments: A. Hawaii County's version of this addition is consistent with the version adopted by Maui County. See: §16.16B.R402.4.1.2, MCC. B. Maui Justcation: Due to concerns relating to timeliness, added costs, and availability of a certified contractor, this "blower door test" is being made optional instead of mandatory. The registered design professional may require this on behalf of the owner. See: §16.16B.R402.4.1.2, MCC. 32 Hawaii County Energy Code Bill Annotated Draft 11/27/19 (3 8) A new subsection 8403.5.5 is added to the International Energy Conservation Code to read as follows: "R403.5.5 Solar water heating. Solar water heating systems are required for new single-family residential construction pursuant to section 196-6.5, Hawaii Revised Statutes. Exception: A water heating device as approved via Solar Hot Water Heater Variance by the Department of Business, Economic Development & Tourism, Hawai'i State Energy Office." Comments: A. Hawaii County's version of this addition is consistent with the version adopted by the State, Kauai County, and Maui County. See: State ECC at §3-181-22, TIAR, §12-64(38), KCC, and§1616B.R403.5.5, MCC B. State Justcation: Solar systems per HRS 196-6 5 are speced to be consistent with state legislation. See: State ECC at§3-181-22, HAR, (39) A new subsection R404.2 is added to the International Energy Conservation Code to read as follows: "R404.2 Ceiling Fans. A ceiling fan, ceiling fan rough-in, or whole house fan may be provided for bedrooms and the largest habitable space that is not used as a bedroom." Comments: A. Clarifies that the largest space must be habitable, Rawai'i County's version of this addition is consistent with the version adopted by Kauai County. See: §12-6.4(40), KCC. B. State Justification: The effect of ceiling fans can be significant in increasing thermal comfort for the occupants of the space. Ceding fans result in a perceived cooling effect of 5.4°F to 12. 6°F based on fan speed (air speed of approximately 3.3ftls to 9.84ftls respectively). Ceiling fans, coupled with the thermal envelope requirements will reduce the need to cool the space with traditional air conditioning. At a minimum, the ceiling fan rough-in would allow the homeowner to easily install a ceiling fan after the house is occupied. The cost of the installation would include only the cost of the fan and installation. Without the rough-in the cost would include providing power to the fan location in addition to support for the fan which could be a barrier to installing fans in the house. See State ECC at§3-181-23, HAR. 33 Hawaii County Energy Code Bill Annotated Draft 11127/19 (40) A new subsection 8404.3 is added to the International Energy Conservation Code to read as follows: "R404.3 Electrical vehicle charger power. An electrical rough-in of a 30 amp circuit for future electrical vehicle charger may be installed in gara eg /carport area." Comments: A. Hawai`i County's version of this addition is consistent with the version adopted by Kauai County. See: x'12-6.4(39), KCC. B. Maui Justification: Provides low cost option for future installation of an electric vehicle charger. See§16.16B.R404.3, MCC. 34 Hawaii County Energy Code Bill Annotated Draft 11127119 (41) TABLE 405.5.2(1) of the International Energy Conservation Code is amended to read as follows: "TABLE R405.5.2(1) SPECIFICATIONS FOR THE STANDARD REFERENCE AND PROPOSED DESIGNS BUILDING STANDARD REFERENCE DESIGN PROPOSED COMPONENT DESIGN Type: mass wall if proposed wall is mass; otherwise As proposed wood frame Above-grade walls Gross area: same as proposed As proposed U factor: asspecified in Table R402.1.4 As proposed Solar absor tance=0.75 As proposed Emittance= 0.90 As proposed Type: same as proposed As proposed Basement and crawl Gross area: same as proposed As proposed space walls U factor: from Table R402.1.4,with insulation layer on As proposed interior side of walls Type: wood frame As pro osed Above-grade floors Gross area: same as proposed As proposed U-factor: asspecified in Table 8402.1.4 As proposed Type: wood frame As proposed Ceilings Gross area: same as proposed As pro osed U-factor: asspecified in Table R402.1.4 As proposed Type: composition shingle on wood sheathing As proposed Roofs Gross area: same as proposed As proposed Solar absorptance=0.75 As proposed Emittance=0.90 As pro osed Attics' Type: vented with aperture= 1 112per 300 ft- ceiling As proposed area Type: same as proposed As proposed Foundations Foundation wall area above and below grade and soil As proposed characteristics: same as proposed Area: 40 ft2 As proposed Opaque doors Orientation:North As pro osed U-factor: same as fenestration from Table R402.1.4 As proposed Total areal,= (a) The proposed glazing area, where the proposed glazing area is less than 15 percent of the Vertical fenestration conditioned floor area As proposed other than opaque doors (b) 15 percent of the conditioned floor area,where the proposed glazing area is 15 percent or more of the conditioned floor area Orientation: equally distributed to four cardinal As proposed compass orientations , E, S & W). 35 Hawaii County Energy Code Bill Annotated Draft 11/27/19 U-factor: as specified in Table R402.1.4 As proposed SHGC: as specified in Table R402.1.2 except that for climates with no requirement(NR) SHGC=0.40 shall As proposed be used. Interior shade fraction: 0.92-(0.21 X SHGC for the 0.92 -(0'21 X standard reference design) SHGC as proposed) External shading: none As proposed Skylights None As proposed Thermally isolated None As proposed sunrooms For residences that are not tested,the Air leakage rate of 5 air changes per hour in climate same air leakage zones 1 and 2, and 3 air changes per hour in climate rate as the standard zones 3 through 8 at a pressure of 0.2 inches w.g(50 reference design. Pa). The mechanical ventilation rate shall be in addition For tested to the air leakage rate and the same as in the proposed residences,the Air exchange rate design, but no greater than 0.01 X CFA +7.5 x (Nh,+ 1) measured air where: exchange ratea. CFA=conditioned floor area The mechanical Nb,=number of bedrooms ventilation rate Energy recovery shall not be assumed for mechanical shall be in addition ventilation. to the air leakage rate and shall be as proposed. None, except where mechanical ventilation is specified by the proposed design,in which case: Annual vent fan energy use: Mechanical ventilation kWh/yr=0.03942 X CFA +29.565 x (NbY+ 1) As proposed where: CFA =conditioned floor area Nb,=number of bedrooms Internal gains IGain= 17,900+23.8 x CFA+4104 X Nb, (Btu/day per Same as standard dwellingunit) reference design Same as standard reference design, plus any additional mass specifically Internal mass An internal mass for furniture and contents of 8 pounds designed as a per square foot of floor area thermal storage element but not integral to the building envelope or structure. Structural mass For masonry floor slabs, 80 percent of floor area As proposed covered b R-2 carpet and pad, and 20 percent of floor 36 Hawaii County Energy Code Bill Annotated Draft 11/27/19 directly exposed to room air. For masonry basement walls, as proposed, but with insulation required by Table R402.1.4 located on the As proposed interior side of the walls For other walls, for ceilings, floors, and interior walls, As proposed wood frame construction [As proposed Other th-An I-e-ating without a [Asper ] design shall be an air setifee heat pump meeting the Heating systemsd°e Fuel type: same as proposed design. As proposed Efficiencies: As proposed Electric: Air-source heat pump with prevailing federal minimum standards. Nonelectric furnaces: natural gas furnace with As proposed prevailing federal minimum standards. Nonelectric boilers: natural gas boiler with prevailing As proposed federal minimum standards. Ca aci : sized in accordance with Section R403.7. As proposed [As pfop ] Fuel type: Electric Cooling systems d,f Efficiency: in accordance with prevailing federal As proposed minimum standards. Capacity: sized in accordance with Section R403.7. As proposed [As-� ] [As pfopese ] Fuel type: same as proposed design As proposed Service water heating d,�, Efficiency: in accordance with prevailing federal As proposed f g minimum standards. Use: Same as proposed design gal/day=30+ 10x& Duct insulation: From Section 8403.2.1 A thermal distribution system efficiency(DSE)of 0.88 As tested or as specified in shall be applied to both the heating and cooling system Table Thermal distribution 8405.5.2(2)if not systems efficiencies for all systems other than tested duct tested. Duct systems. For tested duct systems,the leakage rate shall insulation shall be be 4 cf n(113.3 L/min)per 100 ft2(9.29 m'-)of insuproposed. conditioned floor area at a pressure of differential of 0.1 as inches w.g. (25 Pa). Thermostat Type: Manual, cooling temperature setpoint=75°F; Same as standard Heating temperature setpoint=72°F reference For St: 1 square foot=0.93 M2, 1 British thermal unit= 1055 J, 1 pound per square foot=4.88 kg/M2, 1 gallon(US)=3.785 L, °C=(°F-32)/1.8, 1 degree=0.79 rad. 37 Hawaii County Energy Code Sill Annotated Draft 11127119 a. Where required by the code official,testing shall be conducted by an approved party. Hourly calculations as specified in the ASHRAE Handbook of Fundamentals,or the equivalent shall be used to determine the energy loads resulting from infiltration. b. The combined air exchange rate for infiltration and mechanical ventilation shall be determined in accordance with Equation 43 of 2001 ASHRAE Handbook of Fundamentals,page 26.24 and the"Whole- house Ventilation"provisions of 2001 ASHRAE Handbook of Fundamentals,page 26.19 for intermittent mechanical ventilation. c. Thermal storage element shall mean a component not part of the floors,walls or ceilings that is part of a passive solar system,and that provides thermal storage such as enclosed water columns,rock beds,or phase-change containers.A thermal storage element must be in the same room as fenestration that faces within 15 degrees(0.26 rad)of true south,or must be connected to such a room with pipes or ducts that allow the element to be actively charged. d. For a proposed design with multiple heating,cooling or water heating systems using different fuel types, the applicable standard reference design system capacities and fuel types shall be weighted in accordance with their respective loads as calculated by accepted engineering practice for each equipment and fuel type present. e. For a proposed design without a proposed heating system,a heating system with the prevailing federal minimum efficiency shall be assumed for both the standard reference design and proposed design. f. For a proposed design home without a proposed cooling system, an electric air conditioner with the prevailing federal minimum efficiency shall be assumed for both the standard reference design and the proposed design. g. For a proposed design with a nonstorage-type water heater,a 40-gallon storage-type water heater with the prevailing federal minimum energy factor for the same fuel as the predominant heating fuel type shall be assumed. For the case of a proposed design without a proposed water heater,a 40-gallon storage-type water heater with the prevailing federal minimum efficiency for the same fuel as the predominant heating fuel type shall be assumed for both the proposed design and standard reference design. h. For residences with conditioned basements,R-2 and R-4 residences and townhouses,the following formula shall be used to determine glazing area: AF=Asx FAxF where: AF=Total glazing area AS =Standard reference design total glazing area. FA=(Above-grade thermal boundary gross wall area)/(above-grade boundary wall area+0.5 x below- grade boundary wall area). F=(Above-grade thermal boundary wall area)/(above-grade thermal boundary wall area+common wall area)or 0.56,whichever is greater. and where: Thermal boundary wall is any wall that separates conditioned space from unconditioned space or ambient conditions. Above-grade thermal boundary wall is any thermal boundary wall component not in contact with soil. Below-grade boundary wall is any thermal boundary wall in soil contact. Common wall area is the area of walls shared with an adjoining dwelling unit. L and CFA are in the same units. i. Unvented Attic Spaces.The attic space shall be permitted to be unvented when the design professional determines it would be beneficial to eliminate ventilation openings to reduce salt-laden air and maintain relative humidity 60 percent or lower to: (1) Avoid corrosion to steel components, (2) Avoid moisture condensation in the attic space,or (3) Minimize energy consumption for air conditioning or ventilation by maintaining satisfactory space conditions in both the attic and occupied space below." 38 Hawaii County Energy Code Bill Annotated Draft 11/27/19 Comments: A. Hawaii County's version of this addition is consistent with the version adopted by the State and Kauai County. See: State ECC at§3-181-24, HAR, and§12-6.4(41), KC. B. State Justification: Energy neutral trade-offs are proposed by including the ability to trade-off high efficiency heating, cooling and water heating system efficiencies with building envelope features C. Footnote 'added relating to unvented attic spaces. This allows attic spaces to be permitted as unvented when the design professional determines it would be beneficial. This exception aligns with paragraph 5-71(15), Hawaii County Code. (42) A new section R407 is added to the International Energy Conservation Code to read as follows: ,,SECTION R407 POINTS OPTION R407.1 General(Prescriptive). Above-grade walls and roofs are permitted to comply with the points option as an alternative to complying with Sections R401.2.1 R402.1.2 and R402.2. R407.2 Requirements. One or more efficiency measures shall be selected for roof and above-grade wall systems from Table R407.1 that cumulatively equal or exceed 0 (zero) points. As an alternative above-grade walls and roofs are permitted to comply separately by scoringzero) orrem ater. 39 Hawaii County Energy Code Bill Annotated Draft 11127119 TABLE R407.1 POINTS OPTION Standard Tropical Rome Home Points Points Wood Framed R-19 Roof Insulation -1 0 R-19 Roof Insulation+ Cool roof 0 1 Roof Insulation membranel or Radiant Barrier (Must choose l) R-19 Roof Insulation+Attic 0 1 Venting' R-30 Roof Insulation 0 1 R-13 Cavity Wall Insulation 0 1 R-13 Wall Insulation+high 1 2 Wall Insulation reflectance walls (Must choose 1) R-13 Wall Insulation+ 90% high 1 2 efficacy lighting and Energy Star Appliances 5 R-13 Wall Insulation+exterior 1 2 shadin f=0.36 Ductless Air Conditioner? 1 1 1.071 X Federal Minimum SEER I 1 Mechanical/Electrical Systems for Air Conditioner (Choose ONLY if applies to 1.142 X Federal Minimum SEER 2 2 scope of work) for Air Conditioner No air conditioning installed Not 2 Applicable Must choose if applies to new House floor area< 1,000 SF 1 1 Construction and/or Additions House floor area> 2,500 SF -1 -1 (House floor area to be considered Energy Star Fans- 1 1 as existing dwelling size plus new Install 1 kW or greater of solar 1 1 square foo age) electric Reduce fenestration from 14%to Not -1 10% Applicable 40 Hawaii County Energy Code Bill Annotated Draft 11/27/19 Metal Framed R-13 +R 3 Wall Insulation 0 1 R-13 cavity Wall Insulation+R-0 -1 0 Wall Insulation R-13 Wall Insulation+high 0 1 (Must choose 1) reflectance walls R-13 Wall Insulation+ 90%high 1 2 efficacy lighting and Energy ApplianceS5 R-13 Wall Insulation+ exterior 0 1 shading f=0.36 R-30 Roof Insulation 0 1 R-19 Roof Insulation -1 0 Roof Insulation R-19 + Cool roof membrane' or 0 1 (Must choose 1) Radiant Barrier R-19 Roof Insulation+Attic 0 1 Ventin a Ductless Air Conditioner? 1 1 1.071 X Federal Minimum SEER 1 1 Mechanical I Electrical Systems for Air Conditioner (Choose ONLY if applies to 1.142 X Federal Minimum SEER 2 2 scope of work) for Air Conditioner No air conditioning installed Not 2 Applicable House floor area< 1,000 SF 1 1 Must choose if applies to new House floor area>2,500 SF -1 -1 construction and/or additions Energy Star Fans? 1 1 (house floor area to be considered Install 1 kW or greater of solar 1 1 as existing dwelling size plus new electric square footage) Reduce fenestration from 14%to Not -1 10% AMplicable SF=Square Feet 1 Cool roof with three-year aged solar reflectance of 0.55 and 3-yearged thermal emittance of 0.75 or 3-year aged solar reflectance index of 64. 2 One cfinlft2 attic venting. 3 Radiant barrier shall have an emissivity of no greater than 0.05 as tested in accordance with ASTM E-408. The radiant barrier shall be installed in accordance with the manufacturer's installation instructions. 4 Walls with covering with a reflectance of>0.64. 5 Energy Star rated appliances include refrigerators,dishwashers,and clothes washers and must be installed for the final inspection. 6 The wall projection factor is equal to the horizontal distance from the surface of the wall to the farthest most point of the overhang divided by the vertical distance from the first floor level to the bottom most point of the overhang. 41 Hawaii County Energy Code Bill Annotated Draft 11/27/19 7 All air conditioning systems in the house must be ductless to qualify for this credit. 8 Install ceiling fans in all bedrooms and the largest habitable space that is not used as a bedroom." Comments: A. Hawai`i County's version of this addition is consistent with the version adopted by the State and Kauai County. See: State ECC at§3-181-25, HAR, and§12-6.4(42), KC. B. State Justification: The Points Option provides energy neutral trade-offs for different building assembly types. A prescriptive format was selected to increase the usability of the compliance approach. Energy analysis and research was done to determine the point allowances for each feature. All of the features are given +/- I point with the exception of high efficiency cooling equipment which is either given one (1) or two (2)points based on the SEER rating. The options that are included in the code reflected trade- offs from earlier versions of the Hawai`i Code e.g. eliminating continuous insulation for metal framed walls by using reflective paint or high SEER cooling equipment as a trade-off for continuous insulation. See: State ECC at§3-181-25, HAR. C. Points for metal framed roof insulation, clarifies what trade offs must be chosen if applicable, and allows for a 10%reduction for fenestrations trade off option. (43) Subsection R501.4 of the International Energy Conservation Code is amended to read as follows: "R501.4 Compliance.Alterations, repairs, additions and changes of occupancy to, or relocation of, existing buildings and structures shall comply with the provisions and regulations for alterations, repairs, additions and changes of occupancy or relocation, [fespeefively3 in the biternational Residential Gode,,WeriiatieHal Budding Code-, Code,Mternational Fire Code'International Fuel Gas Code,hiteFfiational A4ehaniea bhTC-ode) Code, hit,eriiational Private Sewage Disposal Code and NFPA ] as adopted by the code official." Comments: A. Hawaii County's version of this addition is consistent with the version adopted by the State, Kauai County, and Maui County. See: State ECC at§3-181-26, HAR, §12-6.4(43), KCC, and §16.168.R501.4, MCC. B. State Justification: The proposed amendment strikes language requiring existing building projects to comply with the suite of International codes when these codes may not have been adopted by the local jurisdiction. This amendment is consistent with Hawaii Revised Statutes§107-25. See: State ECC at§3-181-26, HAR. 42 Hawaii County Energy Code Bill Annotated Draft 11/27/19 (44) Subsection R502.1. of the International Energy Conservation Code is amended to read as follows: "R502.1 General. Additions to an existing building, building system or portion thereof shall conform to the provisions of this code as those provisions relate to new construction without requiring the unaltered portion of the existing building or building system to comply with this code. Additions shall not create an unsafe or hazardous condition or overload existing building systems. An addition shall be deemed to comply with this code where the addition alone complies, where the existing building and addition comply with this code as a single building, or where the building with the addition uses no more energy than the existing building. Additions shall be in accordance with Section R502.1.1 or R502.1.2. Exceptions: 1. When addition includes unconditioned space that does not contain habitable space. 2. When both the existing;building and addition are entirely comprised of habitable unconditioned space if total square footage does not increase more than 1,100 square feet." Comment: Clarifies exceptions.for new additions with unconditioned spaces. As an example, the addition of a covered lanai or carport does not use more energy than the existing dwelling unit prior to the addition. (45) Subsection R503.1.1 of the International Energy Conservation Code is amended to read as follows: "R.503.1.1 Building envelope. Building envelope assemblies that are part of the alteration shall comply with Section R402.1.2 or R402.1.4, Sections R402.2.1 through R402.2.13, R402.3.1, R402.3.2, R402.4.3 and R402.4.4. Exception: The following alterations need not comply with the requirements for new construction provided the energy use of the building is not increased: 1. Storm windows installed over existing fenestration. 2. Existing ceiling, wall or floor cavities exposed during construction provided that these cavities are filled with insulation. 3. Construction where the existing roof, wall or floor cavity is not exposed. 4. Roof recover. 5. [Roofs insulation is exposed dufing fefoofing shall be insulated either above e below the sheathing.] Roof replacement of uninsulated roofs which include at least one of the following: 43 Hawaii County Energy Code Bill Annotated Draft 11/27/19 a. Energy Star compliant roof covering; b. Radiant barrier; or c. Attic ventilation via solar attic fans or ridge ventilation or gable ventilation. 6. Surface-applied window film installed on existing single pane fenestration assemblies to reduce solar heat gain provided the code does not require the glazing or fenestration assembly to be replaced." Comment: State Justification (per Maui County): The Roofing Contractors of Hawai`i reported that the 2015 IECC code requirement for insulating existing roofs would double the cost. This amendment provides an alternative compliance path which addresses the cost issue. See: §16.16B.R503.1.1, MCC. (46) Subsection R503.2 of the International Energy Conservation Code is amended to read as follows: "R503.2 Change in space conditioning. Any nonconditioned or low-energy space that is altered to become conditioned space shall be required to be brought into full compliance with this code. [FA-c en] Exceptions: 1. Where the simulated performance option in Section R405 is used to comply with this section, the annual energy cost of the proposed design is permitted to be 110 percent of the annual energy cost otherwise allowed by Section R405.3. 2. When specified in the tropical zone and the total conditioned space does not exceed 50% of the habitable floor area and R-19 is installed over the conditioned space, and Split ductless air conditioner systems with a SEER ratingin'n the top 25% of readily available units are installed." Comment. This is a compromise to accommodate installation of air conditioning units in homes constructed prior to the adoption of the 2015 IECC. SECTION 3. Severability. If any provision of this ordinance, or the application thereof to any person or circumstance, is held invalid, the invalidity does not affect other provisions or applications of the ordinance which can be given effect without the invalid provision or application, and to this end the provisions of this ordinance are severable. 44 Hawaii County Energy Code Bill Annotated Draft 11127119 SECTION 4. Work performed under a permit issued before the effective date of this ordinance and which is inspected on or after the effective date shall be approved if it meets the requirements of either this code or the code being replaced by this ordinance. SECTION 5. This ordinance shall apply to all applications for permits to be issued pursuant to chapters 5, 9, and 17, Hawaii County Code,that are deemed complete by the Department of Public Works on or after the effective date of this ordinance. An application accepted before the effective date shall be approvable if it meets the requirements of either this ordinance or the code being replaced by this ordinance. SECTION 6. This ordinance shall take effect upon its approval, but nothing in this ordinance shall be construed to prohibit any person from complying with the provisions of this article and any amendments thereto adopted prior to the enactment of this ordinance. 45