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Hawaii County Energy Code Bill <br /> Annotated Draft <br /> 11/27/19 <br /> Slab-on-grade floors <br /> Unheated slabs NR NR <br /> Heated slabs R-7.5 for 12" below R-7.5 for 12"below <br /> Opaque doors <br /> Nonswinging R-4.75 R-4.75 <br /> For SI: 1 inch=25.4 mm, 1,pound per square foot=4.88 kg/M2, 1 pound per cubic foot= 16 kg/m'. <br /> ci=Continuous insulation,NR=No requirement,LS=Liner system. <br /> a. Assemblydescriptions escriptions can be found in ANSI/ASHRAE/IESNA Appendix A. <br /> b. Where using R-value compliance method,a thermal spacer block shall be provided,otherwise use <br /> the U-factor compliance method in Table 0402.1.4. <br /> c. Cool roof is defined as a roof with three-year aged solar reflectance of 0.55 and 3-year aged thermal <br /> emittance of 0.75 or 3-year aged solar reflectance index of 64. <br /> d. R-5.76 is allowed to be substituted with concrete block walls complying with ASTM C 90, <br /> ungrouted or partially grouted at 32 inches or less on center vertically and 48 inches or less on center <br /> horizontally,with ungrouted cores filled with materials having maximum thermal conductivity of <br /> 0.44 Btu-in/h-f OF. See Section 0402.2.3." <br /> Comments: <br /> A. Revised table to include only climate zone I requirements. <br /> B. State Justification: Commercial buildings must have Cool Roof Rating <br /> Council compliant reflective roofs which significantly reduce the need for <br /> insulation, especially in Hawai`i's mild climate. Reducing required <br /> insulation by 50%significantly reduces construction costs while minimally <br /> increasing interior temperatures. <br /> C. See: Maui County at§16.16B.C402, MCC, and Kauai County at§12- <br /> 6.4(12), KCC. <br /> (10) Subsection C402.2.3 of the International Energy Conservation Code is amended to <br /> read as follows: <br /> "C402.2.3 Thermal resistance of above-grade walls. The minimum thermal <br /> resistance (R-value) of materials installed in the wall cavity between framing <br /> members and continuously on the walls shall be as specified in Table C402.1,3, based <br /> on framing type and construction materials used in the wall assembly. <br /> Exceptions: <br /> Continuous insulation for wood, metal framed, and mass walls are not required <br /> when at least one of the following conditions is met: <br /> 1. Walls have a covering with a reflectance of> 0.64. <br /> 2. Walls have overhangs with a projection factor equal to or greater than 0.3. <br /> The projection factor is the horizontal distance from the surface of the wall <br /> 9 <br />