Building Code Board of Appeals Agenda and Packet 2021 09 08

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C403.4.1 Thermostatic controls. The supply of heating and cooling energy to each zone shall be controlled by individual thermostatic controls capable of responding to temperature within the zone. Where humidification or dehumidification or both is provided, no fewer than one humidity control device shall be provided for each humidity control system. Occupancy sensors shall be provided on the thermostat to setback in accordance with C403.4.2.1 Exception: Independent perimeter systems that are designed to offset only building envelope heat losses, gains or both serving one or more perimeter zones also served by an interior system provided that both of the following conditions are met: 1. The perimeter system includes not fewer than one thermostatic control zone for each building exposure having exterior walls facing only one orientation (within ±45 degrees) (0.8 rad) for more than 50 contiguous feet (15 240 mm). 2. The perimeter system heating and cooling supply is controlled by thermostats located within the zones served by the system. 15. Section C403.12.1 Duct and plenum insulation and sealing, is hereby deleted and replaced with the following: C403.12.1 Duct and plenum insulation and sealing. All supply and return air ducts and plenums shall be insulated with not less than R-12. Ducts, air handlers and filter boxes shall be sealed. Joints and seams shall comply with Section 603.9 of the International Mechanical Code. 16. Section C403.12.3 Piping insulation, is hereby amended to read as follows: C403.12.3 Piping insulation. ,stem shall be tl.o....,...11y insulatedaeeordanee ...: tL. Table C403.12.3. Piping serving as part of a heating or cooling system shall be thermally insulated to R-5. 17. Section C404.4Insulation ofpiping, is hereby amended to read as follows: C404.4 Insulation of piping. Piping from a water heater to the termination of the heated water fixture supply pipe shall be insulated in aeeordanee -..;th Table / 403 12.3. to R-3. On both the inlet and outlet piping of a storage water heater or heated water storage tank, the piping to a heat trap or the first 8 feet (2438 min) of piping, whichever is less, shall be insulated. Piping that is heat traced shall be insulated in ......e-r-d ineey,44 T..1.1,. GA 03 124 to R-3 or the heat trace manufacturer's instructions.