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E NERGY C ONSERVATION C ODE§5E-2-1 <br />3. An energy rating index (ERI) approach in Section R406. <br />4. The tropical zone requirements in Section R401.2.1 and <br />R401.3.” <br />(32) Subsection R401.2.1 of the International Energy Conservation Code is <br />amended to read as follows: <br />“R401.2.1 Tropical zone. Residential buildings in the tropical zone <br />at elevations below 5,000 feet above sea level shall be deemed to <br />comply with this chapter where the following conditions are met: <br />1. Not more than one-half of the dwelling unit area is air <br />conditioned. <br />2. The dwelling unit is not heated. <br />3. Solar, wind, or other renewable energy source supplies not <br />less than 90 percent of the energy for service water heating. <br />Exception: A water heating device as approved via Solar <br />Hot Water Heater Variance by the Department of Business, <br />Economic Development & Tourism, Hawai‘i State Energy <br />Office. <br />4. Glazing in dwelling units shall have a maximum solar heat <br />gain coefficient as specified in Table R401.2.1. <br />TABLE 401.2.1 <br />VERTICAL FENESTRATION GLAZING SHGC REQUIREMENTS <br />PROJECTION FACTOR <br />(pf) OF OVERHANG <br />FROM BASE OF <br />SHGC <br />AVERAGE VERTICAL <br />FENESTRATION <br />GLAZING SILL* <br />< 0.30 0.25 <br />0.30 – 0.49 0.40 <br /> N/A <br />*Exceptions: <br />a. North-facing vertical fenestration glazing with pf > 0.20 are exempt from <br />SHGC requirements. Overhangs shall extend 2 feet on each side of vertical <br />fenestration glazing or to nearest wall, whichever is less. <br />b. Jalousie windows are exempt from SHGC requirements. <br />c. “N” indicates vertical fenestration oriented within 45 degrees of true north. <br />“SEW” indicates orientations other than “N”. <br />SUPP. 9 (1-2021) <br />5E-15 <br /> <br />