HomeMy WebLinkAboutCOM 0141.007 2008-2010PETE HOFFMANN
Vice Chair
District 9 -North & Soufh Kohala
Phone: (808) 887-2043 (Waimea)
(808) 967-8273 (Hilo)
Fax: (808) 887-2072
F,mail: phnffmannaco.hawaii.hi.us
Hawai `i County Council
County of Hawai `i ~ ti
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Holomua Center
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64-1067 Mdmalahoa Highway, Suite C-5 ~
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Kamue/a, Hawaii 96743 -~ `-:=~
TO: J Yoshimoto, Council Chair r-'~~ ~} 0_
and Members of the Hawaii County Council = !:r ~ ;.~'
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FROM:
ete Hoffmann, Council Vice Chair °-- o
Date: March 11, 2009
Subject: Proposed Amendment to Bill No. 385, Which Repeals Chapter 5, article 2, Hawaii County
Code 1983 (2005 Edition, as amended), and Adds a New Article Incorporating the
International Energy Conservation Code
This communication is intended to replace Communication No. 141.6. Communication No. 141.6
erroneously attributed proposed amendments to the International Energy Conservation Code 2006 Edition
to the American Institute of Architects and contained one error in the text of the proposed amendments.
Both issues have been corrected by this communication.
Bi11385 amends chapter 5, article 2, Hawaii County Code 1983 (2005 Edition, as amended), Building
Energy Efficiency Standards, by repealing chapter 5, article 2, Hawaii County Code 1983 (2005 Edition,
as amended) in its entirety and replacing it with the International Energy Conservation Code 2006 (IECC).
Deletion of chapter 5, article 2, caused the deletion of provisions for Indigenous Architecture created by
Ordinance No. 07-164. Bill 385 includes SECTION 4, which creates a new article (article 3) to retain those
provisions relating to Indigenous Architecture.
Three types of amendments to Bill 385 are proposed herein:
1. A formatting amendment to existing material in Bill 385;
2. Proposed amendments, as submitted to the State Code Council by the different code
committees, to the existing language of the IECC that will be incorporated into the County
Code; and
3. Deletion of the Ramseyer format clause in Bi11385.
The proposed amendments are as follows:
1. Amend Bi11385 by removing section numbers for amendments to the IECC, using item numbers
instead, and the following formatting changes, to read (illustrated via Ramseyer format with
respect to Bill 385):
Comm. No.
Ref. Tont`'~oi_.,_ ~Ul~i
Serving the Interests of [he People of Our Island 1 7 X009
Hawaii County is an Equal Opportunity Provider and Employer Ref. Uate „
Page 2 of 9
"(1) Amending Section 101.1. Section 101.1 is amended by amending the first paragraph to read:
[r°~] ~ Amending [sestien] Section 101.1. Section 101.1 is amended [~}
°«a:«,. .t.° F..°. «,._°,,...,«t,~ to read [°,. F~11~;~]:
"Section 101.1 Title. This code shall be known as the International Energy Conservation
Code of the County of Hawaii, and shall be cited as such. It is referred to herein as "this
code"."
2. Amend the contents of SECTION 3 of Bill 385 by adding the following amendments to the
IECC, as submitted to the State Code Council by the different code committees, to read
(illustrated via Ramseyer format with respect to the IECC):
"(2) Amending Section 101.5.2. Section 101.5.2 is amended to read:
"Section 101.5.2 Low energy buildings. [T'~° c tt°•°~«°'~••~ta~«°° ]Buildinl=_s, or portions thereof,
separated from the remainder of the building by building thermal envelope assemblies complying
with this code and with a peak design rate of energy usa>?e less than 3.4 Btu/h•ftZ (10.7 W/ m21 or 1.1
watt/ftz (10.7. W/m2) of floor area shall be exempt from the building thermal envelope provisions of
this code-[.
t Tt,°,.° ..~.t, .. °°t~ a°~:,.« .....° °F °«°.. ° t°,.,..t,°« ~ n n...n. rr~ it n~}~0-~bVattffk~
2. TL. ~..° •1...• .J.. «..t .. «t,.:« «Aa,. „A ~ „'ter
(3) Amending Section 202. Section 202, General Definitions, is amended by adding a definition for
"Fully Shaded Windows" to read:
"FULLY SHADED WINDOWS. Windows protected from direct solar heat gain by a proiection
factor of no less than 1.0."
(4) Amending Section 401.1. Section 401.1 is amended to read:
"401.1 Scope. This chapter applies to residential buildings[.-], including those that do not contain
conditioned space."
(5) Amending Table 402.1.1. Footnote h is added to Table 402.1.1 to read:
"TABLE 402.1.1 INSULATION AND FENESTRATION REQUIREMENTS BY COMPONENT"
Climate Fenestration Sk li M" Glazed Ceilin R- Wood Mass Floor Basement` Slab Crawl
Y B B
/.one U-Factor U-Factor Fenestration Value Frame Wall R-Value Wall R-Value Space
Page 3 of 9
SHGC Wall R-Value 2-Value & Depth Wall
2-Value R-Value
l 1.20 0.75 0.40 30 13 3 l3 0 0 0
2 0.75 0.75 0.40 30 13 4 13 0 0 0
3 0.65 0.65 0.40 ` 30 13 5 19 0 0 5 / 13
4 0.40 0.60 NR 38 13 5 19 10/13 10,2ft 10/13
cxccpt
Marine
5 and 0.35 0.60 NR 38 19 or 13 30 10 / 13 10, 2 ft 10 / 13
Marine 13+56
4
6 0.35 0.60 NR 49 19 or IS 30 10/13 10,4ft 10/13
13+56
7 and 8 0.35 0.60 NR 49 21 19 30 10 / 13 10, 4 ft 10 / 13
For SI: 1 foot = 304.8 mm.
a. R-values are minimums. U-factors and SHGC are maximums. R-19 shall be permitted to be
compressed into a 2 x 6 cavity.
b. The fenestration U-factor column excludes skylights. The SHGC column applies to all glazed
fenestration.
c. The first R-value applies to continuous insulation, the second to framing cavity insulation; either
insulation meets the requirement.
d. R-5 shall be added to the required slab edge R-values for heated slabs.
e. There are no SHGC requirements in the Marine zone.
£ Or insulation sufficient to fill the framing cavity, R-19 minimum.
g. "13+5" means R-13 cavity insulation plus R-5 insulated sheathing. If structural sheathing covers
25 percent or less of the exterior, insulating sheathing is not required where structural sheathing is
used. If structural sheathing covers more than 25 percent of exterior, structural sheathing shall be
supplemented with insulated sheathing of at least R-2.
h. The ceiling insulation alternative in Section 402.1.1.1 can be used as an equivalent alternative for
R-30."
(6) Amending Section 402.1.1. Section 402.1.1 is amended by adding Section 402.1.1.1 to read:
"402.1.1.1 Ceilint=_ insulation alternative. When Table 402.1.1 requires R-30 for insulation of
ceiling areas, the following alternate methods of insulation and construction are acceptable:
1. The opaque portions of roof assemblies shall include at least one of the following:
1.1. R-19 insulation between roof or ceiling framing members;
1.2. Two inches of foam board insulation;
1.3. A radiant barrier as provided in Subsection 5 and ventilation as provided in Subsection 4;
1.4. A cool roof as provided in Subsection 6 and a radiant barrier as provided in Subsection
5 or
1.5. Roof heat train factor is less than 0.05 when calculated in accordance with Subsection 8
2. For the purpose of this section, the following terms shall be defined as follows:
2.1. NET FREE VENT AREA. Net free vent area means the total area through which air can
pass in a screen, grille face or register.
2.2. ROOF AREA. Roof area means attic floor area: or, if there is no attic "roof area" means
the horizontal proiection of roof area measured from the outside surface of the exterior walls
Page 4 of 9
2.3 GROSS AREA OF OPAQUE ROOF SURFACES. Gross area of opaque roof surfaces
means the total surface of the roof assembly exposed to outside air or unconditioned spaces
The opaque roof assembly shall exclude skylight surfaces service openings and overhanes
3 Plans shall indicate insulation type thickness and location• ventilation opening~types sizes and
locations; radiant barrier location• and roof surface type as appropriate depending on the option
selected from Subsection 1.
4. For compliance with Subsection 1.3 additional ventilation of the space containing a radiant
barrier shall be provided by at least one of the following
4.1. A baffled ridge vent installed in accordance with the manufacturer's instructions in
addition to lower inlet o enin s to rovide a total of no less than ones uare foot of net free
vent area for each 300 sauare feet of roof area. No less than 30 percent of the total vent area
shall be in either the ridge vent or the lower half of the ventilated space
4 2 Asolar-powered exhaust fan that provides at least one cubic foot per minute of airflow
for each square foot of roof area.
4.3. Upper and lower vents with total net free vent area of at least one sauare foot for each
150 square feet of roof area. At least 30 percent of the total vent area shall be in the upper
half of the ventilated space and at least 30 percent of the total vent area shall be in the lower
half of the ventilated space.
5. For compliance with Subsections 1.3 or 1.4, a 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 with the
shiny side facing down and with a minimum air gap thickness of 3/4 inch below The radiant barrier
ma be secure) attached tp the roof framin or ma be laminated to the bottom of the roof
sheathing. A radiant barrier is a sheet of material with a low emissivity on at least one side that is
used to reduce radiant heat transfer. Radiant barriers typically have a shiny metallic appearance
6. For compliance with Subsection 1.4, a cool roof shall have an infrared emittance of no more than
0.75 when tested in accordance with ASTM E-408 and a high solar reflectance. 1'he manufacturer's
test results shall be acceptable for compliance. A cool roof has both a light color (high solar
reflectance) and a high emittance (can reject heat back to the environment) White painted surfaces
and other smooth white coatings typically meet these requirements. Surfaces that do not meet the
requirements include unpainted metal and metalized roof coatings (silver appearance)
7. At building sites higher than a 2,400-foot elevation, only Subsections 1 1 or 1 2 shall be
acceptable for compliance.
8. For purposes of compliance with Subsection 1.5, the Roof Heat Gain Factor (RHGF) shall be
calculated as described in Eauation 8-1.
Equation 8-1
RHGF=U,_xaxRB
Where:
RHGF=Roof Heat Gain Factor fBtu/ftZ-h-°F]
U =overall thermal transmittance value for the gross area of opaque roof surfaces fBtu/ttz-h-
a =roof surface absorptivity. Between 0.3 and 1 0 [unitlessl
RB =Radiant Barrier credit. Equals 0.33 if a radiant barrier is installed and 1 00 otherwise
(unitlessl. Radiant barrier installation must comply with subsection 8 1 to qualify for Radiant
Barrier credit.
Page 5 of 9
8. L To gualify for the radiant barrier credit (RB) described in Subsection 8, the installation of the
radiant barrier must meet the following criteria:
8.1.1. The emissivity of the radiant barrier must be 0.10 or less 1'he manufacturer must
provide test data or documentation of the emissivity as tested in accordance with ASTM E-
408.
8.1.2. The radiant barrier must be securely installed in a permanent manner using one of the
following installation methods:
8.1.2.1. The radiant barrier shall be draped with the shiny side facine down over the
top cord of the truss before the roof deck is installed. A minimum air gap of/a inch
must be provided between the radiant barrier and the roof deck above at the center of
the span. Aminimum'/4 inch air gap must also be provided between the radiant
barrier and the ceiling or insulation below.
8.1.2.2. The radiant barrier shall be stretched with the shinv side facing down between
the top cords of the truss and stapled or otherwise secured at each side A minimum
air space of/4 inch above and below is required.
8.1.2.3. For attic installations only, the radiant barrier shall be stapled or otherwise
secured to the bottom surface of the top cord of the truss and draped below with the
shiny side facing down. A minimum air space of/4 inch above and below is required
8.1.2.4. For open beam ceiling construction only, the radiant barrier shall be laid on
top of the roof deck with the shinv side facing up and aminimum'/a inch air g~
between the radiant barrier and the roofing material above. The roof slope must be
greater than or equal to 14° from horizontal.
8.1.3. At least one sauare foot of free area for ventilation shall be provided per 150 square
feet of attic floor area, or in the case of vaulted or open-beam ceilings per 150 square feet of
ceiling area. In vaulted or open beam ceilings, the air space shall be vented with vent area
proximately evenly distributed between the top and the bottom. In vaulted ceilings vents
shall be provided for each air space between rafters."
(7) Amending Table 402.1.3. Footnote b is added to Table 402.1.3 to read:
"TABLE 402.1.3 EQUIVALENT U-FACTORS a
Climate Fenestration Skylight Ceiling Frame Wall Mass Floor Basement Crawl i
Zone U-Factor U-Factor U-Factor U-Factor Wall U-Factor Wall Space
U-Factor U-Factor Wall
U-Factor
1 1.2 0.75 0.035 0.082 0.197 0.064 0.360 0.477
2 0.75 0.75 0.035 0.082 0.165 0.064 0.360 0.477
3 0.65 0.65 0.035 0.082 0.141 0.047 0.360 0.136
4 except 0.40 0.60 0.030 0.082 0.141 0.047 0.059 0.065
Marine
5 and 0.35 0.60 0.030 0.060 0.082 0.033 0.059 0.065
Marine
4
6 0.35 0.60 0.026 0.060 0.06 0.033 0.059 0.065
7 and 8 0.35 0.60 0.026 0.057 0.057 0.033 0.059 0.065
Page 6 of 9
a. Nonfenestration U-factors shall be obtained from measurement, calculation or an approved
source.
b. Includine framed floors and knee walls."
(8) Amending Section 402.2.2. Section 402.2.2 is amended to read:
"402.2.2 Ceilings without attic spaces. Where Section 402.1.1 would require insulation levels
above R-30 and the design of the roof/ceiling assembly does not allow sufficient space for the
required insulation, the minimum required insulation for such roof/ceiling assemblies shall be [R-
~] R-19. [Thin re-'. ,..~ „F: .in.: ~.,.....t,n n~ , ..«,. ,.F e nn~ i i ti ii ~. i~ a
wv ~quarc a:;c' ins ,..,~ ,.o,.,,:n.,,. n n ]))
(9) Amending Section 402.3.3. Section 402.3.3 is amended to read:
"402.3.3 Glazed fenestration exemption. [lop] Fully shaded windows, north-facine windows and
to 15 square feet (1.4 m2) of glazed fenestration per dwelling unit shall be permitted to be
exempt from U-factor and SHGC requirements in Section 402.1.1."
(10) Amending Section 402.4.1. Section 402.4.1 is amended by adding Section 402.4.1.1 to read:
"402.4.1.1. Non-conditioned buildine exemption. Non-conditioned residential buildings are
exempt from compliance with Section 402.4. The free-vent fenestration area ofnon-conditioned
buildings shall be no less than 14 percent of the floor area. All interior doors shall be capable of
being secured in the open position and ceiling fan stub-ins shall be provided to living areas and
bedrooms."
(11) Amending Section 402.4.2. Section 402.4.2 is amended to read:
"402.4.2 Fenestration air leakage. Windows, skylights and slidin~ glass doors shall have an air
infiltration rate of no more than 0.3 cfm per square foot (1.5 L/s/m ), and swinging doors no more
than 0.5 cfm per square foot (2.6 L/s/m2), when tested according to NFRC 400 or
AAMA/WDMA/CSA 101/LS.2/A440 by an accredited, independent laboratory and listed and
labeled by the manufacturer.
Exceptions:
1. Site-built windows, skylights and doors[.-];
2. Jalousie windows shall not exceed 1.2 cfm per souare foot (6 1 L/s/m2) "
(12) Amending Section 403. Section 403 is amended by adding Section 403.7 to read:
"403.7 Residential pools. Residential pools shall be provided with energy conserving measures in
accordance with Sections 403.7.1 through 403.7.3.
Page 7 of 9
403.7.1 Pool heaters. All pool heaters shall be equipped with a readily accessible on-ofF
switch to allow shutting off the heater without adiusting the thermostat setting Pool heaters fired by
natural gas shall not have continuously burning pilot lights.
403.7.2 Time switches. Time switches that can automatically turn off and on heaters and
pumps according to a preset schedule shall be installed on swimming_pool heaters and pumps
Exceptions:
1. Where public health standards require 24-hour pump operation;
2. Where pumps are required to operate solar- and waste-heat-recovery pool heating s std
insulation value of R-12.
Exception: Pools deriving over 60 percent of the energy for heating from site-recovered energy or
solar energy source."
(13) Amending section 503.2.9. Section 503.2.9 is amended by repealing section 503.2.9 in its entirety
and replaced to read as follows:
"503.2.9 Mechanical svstems commissionine and comnletion requirements
503.2.9.1 System commissioning. Commissioning is a process that verifies and documents
that the selected building systems have been designed, installed, and function according to the
owner's project requirements and construction documents. Drawing notes shall require
commissioning and completion requirements in accordance with this section. Drawing notes may
refer to specifications for further requirements. Copies of all documentation shall be given to the
owner.
503.2.9.1.1 Commissioning plan. A commissioning plan shall include as a minimum the
following items:
1. A detailed explanation of the original owner's project requirements,
2. A narrative describing the activities that will be accomplished duringeach phase oP
commissioning, including_guidance on who accomplishes the activities and how they are
completed,
3. Equipment and svstems to be tested, including the extent of tests,
4. Functions to be tested (for example calibration, economizer control, etc.l,
5. Conditions under which the test shall be performed (for example winter and summer
design conditions, full outside air, etc.), and
6. Measurable criteria for acceptable performance.
503.2.9.1.2 Systems adiusting and balancing. All HVAC svstems shall be balanced in
accordance with generally accepted en ing Bering standards. Air and water flow rates shall be
measured and adjusted to deliver final flow rates within 10 percent of design rates Test and balance
activities shall include as a minimum the followin itg ems:
1. Air systems balancing: Each supply air outlet and zone terminal device shall be equipped
with means for air balancing in accordance with the requirements of Chapter 6 of the 2006
International Mechanical Code, InternationalCode Council Publications 4051 West
Flossmoor Road, Country Club Hills. IL. 60478-5795. Discharge dampers are prohibited on
constant volume fans and variable volume fans with motors 10 hp (18.6 kW) and lar er. Air
systems shall be balanced in a manner to first minimize throttling losses then for fans with
Page 8 of 9
s s~power of greater than 1 hp, fan speed shall be adjusted to meet design flow
conditions.
Exception: Fan with fan motors of 1 hp or less.
2. Hydronic systems balancing: Individual hvdronic heating and cooling coils shall be
equipped with means for balancine and pressure test connections. Hvdronic systems shall be
proportionately balanced in a manner to first minimize throttling losses, then the pump
impeller shall be trimmed or pump speed shall be adjusted to meet design flow conditions.
Each hvdronic svstem shall have either the ability to measure pressure across the pump, or
test ports at each side of each pump
Exception: Pumps with pump motors of 5 hp or less."
(14) Amending Section 505.7 Section 505.7 is amended to read:
"505.7 Electrical energy consumption. (Mandatory). In buildings having individual dwelling or
subtenant units, provisions shall be made to determine the electrical energy consumed by each tenant
by separately metering individual dwelling and subtenant units. Tenants shall have ready physical
access to meters. Meters shall display kWh consumption and be calibrated in accordance with ANSI
C12.1-2008."
(15) Amending Chapter 6 Chapter 6, Referenced Standards, is amended by adding the following
specifications to the ANSI and ASTM categories, to read:
"ANSI
Standard
reference
number Title
Referenced
in code
section number
C12.1-2008 Electric Meters Code for Electricity Metering .........................505.7
ASTM
Standard
reference
number Title
Referenced
in code
section number
E 408-2008 Standard Test Methods for Total Normal Emittance of
Surfaces Using Inspection Meter Techniques ..................402.1.1.1 #5,
402.1.1.1 #6,
402.1.1.1 #8.1.1"
3. SECTION 6 of Bill 385, the Ramseyer format clause, is deleted in its entirety as it is unnecessary.
All material contained within Bi11385 is proposed for addition; therefore underlining is not needed and can
only serve as a distraction for the reader. Subsequent SECTIONS of Bill 385 are renumbered to reflect the
deletion of the Ramseyer format clause.
Page 9 of 9
A draft of Bill 385, Draft 2, is attached with the proposed amendments contained in this communication
incorporated.
Thank you.
PH/kf
AYt.
AN ORDINANCE AMENDING CHAPTER 5, ARTICLE 2 OF THE HAWAII COUNTY
CODE 1983 (2005 EDITION, AS AMENDED), RELATING TO BUILDING ENERGY
EFFICIENCY STANDARDS.
BE IT ORDAINED BY THE COUNCIL OF THE COUNTY OF HAWAII:
SECTION 1. Purpose. The purpose of this ordinance is to repeal divisions 1-14 of
chapter 5, article 2 of the Hawaii County Code and replace those provisions with the contents of
the 2006 International Energy Conservation Code, March 2007 Edition, as amended. This action
will enable the County to meet national and international energy standards, ensure that our
residential and commercial buildings are not only safe but also energy efficient, and move the
county towards the energy-efficiency goals established by the Sustainability 2050 Task Force.
Division 15 of article 2, chapter 5, relates to indigenous architecture as adopted by Ordinance No.
07-164, and shall be retained as a separate article, as set out in Section 4 of this ordinance.
SECTION 2. Chapter 5, article 2, Hawaii County Code 1983 (2005 Edition, as
amended), is hereby repealed in its entirety.
SECTION 3. Chapter 5, article 2, Hawaii County Code 1983 (2005 Edition, as
amended), is hereby replaced with the contents of the "2006 International Energy Conservation
Code", March 2007 Edition, published by the INTERNATIONAL CODE COUNCIL, INC.,
Publications, 4051 West Flossmoor Road, Country Club Hills, IL 60478-5795, and further
amended to read as follows:
"Article 2. Adoption of the International Energy Conservation Code,
2006 Edition.
Section 5-2.1.1. Adoption of the International Energy Conservation Code.
(a) The "2006 International Energy Conservation Cade", March 2007 Edition, published by
the INTERNATIONAL CODE COUNCIL, INC., Publications, 4051 West Flossmoor
Road, Country Club Hills, IL 60478-5795 and amendments as set out in section 3(a), is
adopted by reference and made a part of this chapter, subject to the amendments in this
article.
(b) Copies of the 2006 International Energy Conservation Code, March 2007 Edition, and
amendments thereto shall be available at the department of public works and the office of
the county clerk.
(1) Amending Section 101.1. Section 101.1 is amended to read:
"Section 101.1 Title. This code shall be known as the International Energy Conservation
Code of the County of Hawaii, and shall be cited as such. It is referred to herein as "this
code."
(2) Amending Section 101.5.2. Section 101.5.2 is amended to read:
"Section 101.5.2 Low energy buildings. Buildings, or portions thereof, separated from the
remainder of the building by building thermal envelope assemblies complying with this
code and with a peak design rate of energy usage less than 3.4 Btu/h•flz (10.7 W/ m2) or
1.0 watt/ftZ (10.7 W/m2) of floor area shall be exempt from the building thermal envelope
provisions of this code."
(3) Amending Section 202. Section 202, General Definitions, is amended by adding a
definition for "Fully Shaded Windows" to read:
"FULLY SHADED WINDOWS. Windows protected from direct solar heat gain by a
projection factor of no less than 1.0."
(4) Amending Section 401.1. Section 401.1 is amended to read:
"401.1 Scope. This chapter applies to residential buildings, including those that do not
contain conditioned space."
(5) Amending Table 402.1.1. Footnote h is added to Table 402.1.1 to read:
"TABLE 402.1.1 INSULATION AND FENESTRATION REQUIREMENTS BY COMPONENT
Climate Fenestration Skylight Glazed Ceiling R- Wood Mass Floor Basement° Slab Crawl
Zone CI-Factor O-Factor Fenestration Value Frame Wall R-Value Wall R-Value Spacc
SHGC Wall R-Value R-Valuc & Depth Wall
R-Value R-Value
I 120 0.75 0.40 30 13 3 13 0 0 0
2 0.75 0.75 0.40 30 13 4 13 0 0 0
3 0.65 0.65 0.40° 30 13 5 19 0 0 5 / 13
4 0.40 0.60 NR 38 13 5 19 10 / 13 10, 2 [i 10 / 13
except
Marine
5 and 0.35 0.60 NR 38 19 or I3 30 I 0 / 13 1 Q, 2 ft 10 / 13
Marine 13+56
4
6 0.35 0.60 NR 49 19 or IS 30 10/13 10,4ft 10/13
13+56
7 and 8 0.35 0.60 NR 49 21 19 30 10 / 13 10.4 ft 10 / 13
For SI: 1 foot = 304.8 mm.
a. R-values are minimums. U-factors and SHGC are maximums. R-19 shall be permitted
to be compressed into a 2 x 6 cavity.
b. The fenestration U-factor column excludes skylights. The SHGC column applies to all
glazed fenestration.
c. The first R-value applies to continuous insulation, the second to framing cavity
insulation; either insulation meets the requirement.
d. R-5 shall be added to the required slab edge R-values for heated slabs.
2
e. There are no SHGC requirements in the Marine zone.
f. Or insulation sufficient to fill the framing cavity, R-19 minimum.
g. "13+5" means R-13 cavity insulation plus R-5 insulated sheathing. If structural
sheathing covers 25 percent or less of the exterior, insulating sheathing is not required
where structural sheathing is used. If structural sheathing covers more than 25 percent of
exterior, structural sheathing shall be supplemented with insulated sheathing of at least R-
2.
h. The ceiling insulation alternative in Section 402.1.1.1 can be used as an equivalent
alternative for R-30."
(6) Amending Section 402.1.1. Section 402.1.1 is amended by adding Section 402.1.1.1 to
read:
"402.1,1.1 Ceiling insulation alternative. When Table 402.1.1 requires R-30 for insulation
of ceiling areas the following alternate methods of insulation and construction are
acceptable:
1 The opaque portions of roof assemblies shall include at least one of the following:
1.1. R-19 insulation between roof or ceiling framing members;
1.2. Two inches of foam board insulation;
1.3. A radiant barrier as provided in Subsection 5 and ventilation as provided in
Subsection 4•
1 4 A cool roof as provided in Subsection 6 and a radiant barrier as provided in
Subsection 5; or
1 5. Roof heat gain factor is less than 0.05 when calculated in accordance with
Subsection 8.
2. For the pumose of this section, the following terms shall be defined as follows:
2.1. NET FREE VENT AREA. Net free vent area means the total area through
which air can pass in a screen, grille face or re ig ster.
2.2. ROOF AREA. Roof area means attic floor area; or, if there is no attic, "roof
area" means the horizontal proiection of roof area measured from the outside
surface of the exterior walls.
2.3 GROSS AREA OF OPAOUE ROOF SURFACES. Gross area of opaque roof
surfaces means the total surface of the roof assembly exposed to outside air or
unconditioned spaces. The opaque roof assembly shall exclude skylight surfaces,
service openings, and overhangs.
3. Plans shall indicate insulation type, thickness, and location; ventilation opening types,
sizes and locations; radiant barrier location; and roof surface type as appropriate,
depending on the option selected from Subsection 1.
4. For compliance with Subsection 1.3, additional ventilation of the space containing a
radiant barrier shall be provided by at least one of the following:
4.1. A baffled ridge vent installed in accordance with the manufacturer's
instructions in addition to lower inlet openings to provide a total of no less than
one square foot of net free vent azea for each 300 square feet of roof area. No less
than 30 percent of the total vent area shall be in either the ridge vent or the lower
half of the ventilated space.
4 2 Asolar-powered exhaust fan that provides at least one cubic foot per minute
of airflow for each square foot of roof area.
4 3 Upper and lower vents with total net free vent area of at least one square foot
for each 150 square feet of roof area. At least 30 percent of the total vent area shall
be in the upper half of the ventilated space and at least 30 percent of the total vent
area shall be in the lower half of the ventilated space.
5 For compliance with Subsections 1 3 or 1.4 a radiant barrier shall have an emissivity of
no greater than 0 OS as tested in accordance with ASTM E-408. The radiant barrier shall
be installed with the shinv side facing down and with a minimum air ~p thickness of/g
inch below. The radiant barrier may be securely attached to the roof framin = o~Lbe
laminated to the bottom of the roof sheathing. A radiant barrier is a sheet of material with
a low emissivity on at least one side that is used to reduce radiant heat transfer. Radiant
barriers typically have a shinv metallic appearance.
6 For compliance with Subsection 1.4 a cool roof shall have an infrared emittance of no
more than 0.75 when tested in accordance with ASTM E-408 and a high solar reflectance.
The manufacturer's test results shall be acceptable for compliance. A cool roof has both a
light color (high solar reflectance) and a high emittance (can reiect heat back to the
environment) White painted surfaces and other smooth white coatings typically meet
these requirements. Surfaces that do not meet the requirements include unpainted metal
and metalized roof coatin s silver a earance .
7 At building sites higher than a 2 400-foot elevation, only Subsections 1.1 or 1.2 shall be
acceptable for compliance.
8 For purposes of compliance with Subsection 1 5 the Roof Heat Gain Factor (RHGF)
shall be calculated as described in Equation 8-1.
Equation 8-1
RHGF=U,XaxRB
Where:
RHGF =Roof Heat Gain Factor [Btu/ft2-h-°Fl
77 = .,.,Prall rhr+rmal tranemittanee valve fnr the vrnss area of nnarnie rnnf surfaces
a =roof surface absomtivity. Between 0.3 and 1.0 funitless]
RB =Radiant Barrier credit. Equals 0.33 if a radiant barrier is installed and 1.00
otherwise funitless] Radiant barrier installation must comply with subsection 8.1
to qualify for Radiant Barrier credit.
8.1. To aualifv for the radiant barrier credit (RB) described in Subsection 8, the
installation of the radiant barrier must meet the following criteria:
8.1.1. The emissivity of the radiant barrier must be 0.10 or less. The manufacturer
must provide test data or documentation of the emissivity as tested in accordance
with ASTM E-408.
8 1.2. The radiant barrier must be securely installed in a permanent manner using
one of the following installation methods:
8.1.2.1 The radiant barrier shall be draped with the shiny side facin =down
over the top cord of the truss before the roof deck is installed. A minimum
air g_ap of/< inch must be provided between the radiant barrier and the roof
deck above at the center of the span. A minimum 3/a inch air gap must also
be provided between the radiant barrier and the ceiline or insulation below.
8.1.2 2. The radiant barrier shall be stretched with the shiny side facing
down between the top cords of the truss and stapled or otherwise secured at
each side A minimum air space of/4 inch above and below is required.
8 1 2.3. For attic installations only, the radiant barrier shall be stapled or
otherwise secured to the bottom surface of the top cord of the truss and
draped below with the shinv side facing down A minimum air space of/<
inch above and below is required.
8.1.2 4. For open beam ceiling construction only, the radiant barrier shall
be laid on top of the roof deck with the shinv side facing up and a
minimum 3/o inch air gap between the radiant barrier and the roofing
material above. The roof slope must be greater than or equal to ]4° from
horizontal.
8.1.3 At least one square foot of free area for ventilation shall be provided per 150
square feet of attic floor area or in the case of vaulted or open-beam ceilings, per
I50 square feet of ceiling area. In vaulted or open beam ceilings, the air space shall
be vented with vent area approximately evenly distributed between the top and the
bottom In vaulted ceilings vents shall be provided for each air space between
rafters."
(7) Amending Table 402.1.3. Footnote b is added to Table 402.1.3 to read:
"TABLE 402.1.3 EQUIVALENT U-FACTORS"
Climate Fenestration Skylight Ceiling Frame Wall Mass Floorb Basement Crawl
Zone U-Factor U-Factor U-Factor U-Factor Wall U-Factor Wall Space
U-Factor U-Factor Wall
U-Factor
1 1.2 0.75 0.035 0.082 0.197 0.064 0.360 0.477
2 0.75 0.75 0.035 0.082 0.165 0.064 0.360 0.477
3 0.65 0.65 0.035 0.082 0.141 0.047 0.360 0.136
4 except 0.40 0.60 0.030 0.082 0.141 0.047 0.059 0.065
Marine
5 and 0.35 0.60 0.030 0.060 0.082 0.033 0.059 0.065
Marine
4
6 0.35 0.60 0.026 0.060 0.06 0.033 0.059 0.065
7 and 8 0.35 0.60 0.026 0.057 0.057 0.033 0.059 0.065
a. Nonfenestration U-factors shall be obtained from measurement, calculation or an
approved source.
b. Including framed floors and knee walls."
(8)
(9)
(10)
(11)
Amending Section 402.2.2. Section 402.2.2 is amended to read:
"402.2.2 Ceilings without attic spaces. Where Section 402.1.1 would require insulation
levels above R-30 and the design of the roof/ceiling assembly does not allow sufficient
space for the required insulation, the minimum required insulation for such roof/ceiling
assemblies shall be R-19."
Amending Section 402.3.3. Section 402.3.3 is amended to read:
"402.3.3 Glazed fenestration exemption. Fully shaded windows, north-facing windows
and up to 15 square feet (1.4 m2) of glazed fenestration per dwelling unit shall be
permitted to be exempt from U-factor and SHGC requirements in Section 402.1.1."
Amending Section 402.4.1. Section 402.4.1 is amended by adding Section 402.4.1.1 to
read:
"402 4 1 1 Non-conditioned building exemption. Non-conditioned residential buildings
are exempt from compliance with Section 402.4. The free-vent fenestration area of non-
conditioned buildings shall be no less than 14 percent of the floor area. All interior doors
shall be capable of being secured in the open position and ceiling fan stub-ins shall be
provided to living areas and bedrooms."
Amending Section 402.4.2. Section 402.4.2 is amended to read:
"402.4.2 Fenestration air leakage. Windows, skylights and sliding glass doors shall have
an air infiltration rate of no more than 0.3 cfm per square foot (1.5 L/s/m2), and swinging
doors no more than 0.5 cfin per square foot (2.6 L/s/m2), when tested according to NFRC
400 or AAMA/WDMA/CSA 101/LS.2/A440 by an accredited, independent laboratory
and listed and labeled by the manufacturer.
Exceptions:
1. Site-built windows, skylights and doors;
2. Jalousie windows shall not exceed 1.2 cfm per square foot (6.1 L/s/m2)."
(12) Amending Section 403. Section 403 is amended by adding Section 403.7 to read:
"403 7 Residential pools Residential pools shall be provided with energy conserving
measures in accordance with Sections 403.7.1 through 403.7.3.
403 7 1 Pool heaters. All pool heaters shall be equipped with a readily accessible
on-off switch to allow shutting off the heater without adiusting the thermostat setting. Pool
heaters fired by natural gas shall not have continuously burning pilot lights.
403 7 2 Time switches Time switches that can automatically turn off and on
heaters and pumps according to a preset schedule shall be installed on swimming Wool
heaters and pumps.
Exceptions:
1 Where public health standards require 24-hour pump operation;
2 Where pumps are required to operate solar- and waste-heat-recovery pool
heating svstems.
403 7 3 Pool covers Heated pools shall be equipped with a vapor retardant pool
cover on or at the water surface Pools heated to more than 90°F (32°C) shall have a pool
cover with a minimum insulation value of R-12.
Exception• Pools deriving over 60 percent of the energy for heating from site-recovered
energy or solar energy source."
(13) Amending section 503.2.9. Section 503.2.9 is amended by repealing section 503.2.9 in
its entirety and replaced to read as follows:
"503 2 9 Mechanical svstems commissioning and completion requirements.
503 2 9 1 System commissioning. Commissioning is a process that verifies and
documents that the selected building svstems have been designed, installed, and function
according to the owner's project requirements and construction documents. Drawing notes
shall require commissioning and completion requirements in accordance with this section.
Drawing notes may refer to specifications for further requirements. Copies of all
documentation shall be given to the owner.
503 2 9 1 1 Commissioning plan A commissioning plan shall include as a
minimum the followin itg ems:
1 A detailed explanation of the original owner's project requirements,
2 A narrative describing the activities that will be accomplished during each phase
of commissioning including guidance on who accomplishes the activities and how
they are completed,
3 Equipment and svstems to be tested including the extent of tests,
4 Functions to be tested (for example calibration economizer control etc.)
5 Conditions under which the test shall be performed (for example winter and
summer design conditions full outside air, etc. ,and
6 Measurable criteria for acceptable performance.
503 2 9 1 2 Systems adjusting and balancing All HVAC svstems shall be balanced
in accordance with generally accepted engineering standards. Air and water flow rates
shall be measured and adjusted to deliver final flow rates within 10 percent of design
rates Test and balance activities shall include as a minimum the following items:
1 Air svstems balancing: Each supply air outlet and zone terminal device shall be
equipped with means for air balancing in accordance with the requirements of
Chapter 6 of the 20061nternational Mechanical Code InternationalCode Council,
Publications 4051 West Flossmoor Road Country Club Hills IL. 60478-5795.
Discharge dampers are prohibited on constant volume fans and variable volume
fans with motors 10 hp (18 6 kW) and larger. Air systems shall be balanced in a
7
manner to first minimize throttling losses then, for fans with system power of
greater than 1 hp fan speed shall be adiusted to meet design flow conditions.
Exception: Fan with fan motors of 1 hp or less.
2. Hvdronic svstems balancing: Individual hvdronic heating and coolin¢ coils shall
be equipped with means for balancing and pressure test connections. Hvdronic
svstems shall be proportionately balanced in a manner to first minimize throttling
losses then the pump impeller shall be trimmed or pump speed shall be adiusted to
meet design flow conditions. Each hvdronic system shall have either the ability to
measure pressure across the pump, or test ports at each side of each pump.
Exception: Pumps with pump motors of 5 hp or less."
(14) Amending Section 505.7 Section 505.7 is amended to read:
"505.7 Electrical energy consumption. (Mandatory). In buildings having individual
dwelling or subtenant units, provisions shall be made to determine the electrical energy
consumed by each tenant by separately metering individual dwelling and subtenant units.
Tenants shall have ready physical access to meters. Meters shall display kWh
consumption and be calibrated in accordance with ANSI C12.1-2008."
(15) Amending Chapter 6 Chapter 6, Referenced Standards, is amended by adding the
following specifications to the ANSI and ASTM categories, to read:
"ANSI
Standard
reference
number Title
Referenced
in code
section number
C12.1-2008 Electric Meters Code for Electricity Metering .........................505.7
ASTM
Standard Referenced
reference in code
number Title section number
E 408-2008 Standard Test Methods for Total Normal Emittance of
Surfaces Using Inspection Meter Techniques ..................402.1.1.1 #5,
402.1.1.1 #6,
402.1.1.1 #8.1.1"
SECTION 4. Chapter 5, Hawaii County Code 1983 (2005 Edition, as amended) is
amended by adding an article to read as follows:
"Article 3. Indigenous Architecture.
Section 5-3.1 Policy.
This code shall be administered with due consideration given to the County policy that
indigenous Hawaiian architecture furthers the County's compelling interests in cultural,
environmental, and historic preservation; energy efficiency; economic development; aesthetic
beauty; and public safety. For purposes of this section, indigenous Hawaiian architecture
includes any of the predominant architectural practices, customs, styles, and techniques
historically employed by the native residents of the Hawaiian Islands, including structures
comprised of either rock walls or wood frames for the bottom portion of structures and thatch of
different native grasses and leaves for the roof.
Section 5-3.2 Rules.
The building official shall adopt rules to further the County policy on indigenous
Hawaiian architecture.
Section 5-3.3 Bill.
Within twenty-four months of this division's effective date, the building official shall
submit a proposed bill to the council to revise this chapter with the purpose of more equitably
and efficiently furthering the County policy on indigenous Hawaiian architecture. The proposed
bill shall contain rules that specifically identify predominant architectural practices, customs,
styles, and techniques historically employed by the native residents of the Hawaiian Islands and
their descendants. The rules shall express general approval of such practices, customs, styles, and
techniques, to the extent that they do not conflict with the building code's overall purposes.
Section 5-3.4. Alternate materials, alternate design and methods of construction.
(a) The provisions of this code are not intended to prevent the use of any material, alternate
design or method of construction not specifically prescribed in this code, including
elements based on or inspired by principles of indigenous architecture, such as those
associated with structures comprised of either rock walls or wood frames for the bottom
portion of structures and thatch of different native grasses and leaves for the roof,
provided any alternate has been approved and its use authorized by the building official.
(b) The building official may approve any such alternate, provided the building official has
previously granted an exception and the building official finds that the proposed design is
satisfactory and complies with the provisions of this code and that the material, method
or work offered is, for the purpose intended, at least the equivalent of that prescribed in
this code in suitability, strength, effectiveness, fire resistance, durability, safety, and
sanitation.
(c) The following materials are examples of the types of materials that may be considered by
the building official, if used for the construction or renovation of a structure that is based
on or inspired by principles of indigenous architecture:
(1) Wood for house timbers (walls): hamau, kauila, lama, nioi, and `ohi`a; and
9
(2) House thatch and lining material (roof): lala`ama`u (fern fronds); lauhulu and lau
mai`a (banana leaves); pa`a`a mai`a (banana trunk layers); pili, maoli, pu`upu`u
pueo, kawelu, kiolohia, `aka `akai, uki, and lele (grasses and leaves, sedges,
bulrushes); lauhala, ko`o, i`o k`o, mu`o hala, pu`awa, pukani, pilila`ele, la`ele,
pala lauhala, pa`ilau`ula, and ki (pandanus leaf); and lau ko, lau`o, lako, and la`o
(sugarcane leaves).
(d) The building official shall require that sufficient evidence or proof be submitted to
substantiate any claims that may be made regarding the use of the alternate. The details of
any action granting approval of an alternate shall be recorded and entered in the files of
the code enforcement agency.
Section 5-3.5. Housing code exclusion.
All indigenous Hawaiian architecture structures constructed in accordance with this
chapter are not required to comply with requirements in chapter 11, Hawaii County Code,
pertaining to the housing code.
Section 5-3.6. Indemnification and responsibility.
The property owner shall defend, indemnify and hold harmless the County, its officers
and agents, from all claims, demands, suits, actions or proceedings of every name, character and
description which may be brought against the County for or on account of any injuries or
damages to any person or property as a consequence of any work done under a permit issued for
an indigenous Hawaiian architecture structure."
SECTION 5. Nothing in this ordinance or in the Energy Conservation Code hereby
adopted shall be construed to affect any suit or proceeding impending in any court, or any rights
acquired, or liability incurred, or any cause or causes of action acquired or existing, under any
act or ordinance; nor shall any just or legal right or remedy of any character be lost, impaired or
affected by this ordinance.
SECTION 6. If any provision of this ordinance or the application thereof to any person
or circumstance, is held invalid, such invalidity shall not affect other provisions or applications
of the ordinance that can be given effect without the invalid provision or application, and to this
end, the provisions of this ordinance are declared to be severable.
SECTION 7. This ordinance shall take effect one year after its approval.
10