Building Code Board of Appeals Agenda and Packet 2025 05 12

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Building Code Board of Appeals Packet May 12, 2025 Page 15 of 64 1. The area weighted average U-factor and SHGC of all vertical fenestration shall be equal to or less than the values specified in Table R408.2.1.2. 2. The area weighted average U-factor and SHGC of all vertical fenestration shall be equal to or less than the values for the Northern Climate Zone in the latest version of the ENERGY STAR specification for residential windows, doors and skylights. This provides details on the new optional credits for space heating fuel neutrality. (LECC) [Simplification from LECC] [Flexibility] 26.Section R408.2.2 More efficient HVAC equipment performance options is amended to add a new item #15 as follows: 15.Space heating fuel neutrality credit: Heat pump with greater than or equal to the federal minimum efficiency rating for the location where the heat pump is installed, and a capacity ratio >_ 70 percent of heating capacity at 5°F (-15°C) versus rated heating capacity at 47°F (8.3°C). For new buildings, the credit value for this item may be added to the credit value for R408.2.2(14) when the requirements of both measures are met. For alterations. the credit value for this item may be added to the credit value for R408.2.2(13) or R408.2.2(14) when the requirements of both measures are met. This provides details on the new optional credits for evaporative cooling. (LECC) [Flexibility] 27.A new Section R408.2.2.2 Evaporative cooling is added as follows: R408.2.2.2 Evaporative cooling. Evaporative cooling equipment used for space cooling shall achieve the credits allocated in Table R408.2 where it meets all of the following: 1. Not less than 80 percent of the total HVAC space cooling capacity of the dwelling unit is provided by evaporative cooling. 2. Evaporative cooling equipment is installed in accordance with Section 928.1 of the International Mechanical Code.