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Mechanical Requirements • • of <br /> 2021 WSEC Requirements for Commercial Buildings including Group R2,R3&R4 over 3 stories&all R1 -- Administered by @2024 NEEA,All rights reserved <br /> The following information is necessary to check a mechanical permit application for compliance with the mechanical systems and equipment requirements in the <br /> Washington State Energy Code,Commercial Provisions. <br /> For questions about this report,contact WSEC Commercial Technical Support at 360-539-5300 or via email at com.techsupport@waenergycodes.com <br /> NA C403.3.2.6 Electric heating/ Verify all packaged and split electric <br /> cooling equipment equipment with>6,000 Btu/h cooling <br /> capacity and any amount of heating is a heat <br /> pump with reverse-cycle defrost and operates <br /> in heat pump mode when outdoor air <br /> temperature is>25 degree F;include in <br /> equipment schedules <br /> NA C403.3.2.6 Electric heating/ Verify electric heat in the main supply duct <br /> cooling equipment before VAV boxes served by cooling only <br /> systems>6,000 Btu/h is a heat pump with <br /> reverse-cycle defrost and operates in heat <br /> pump mode when outdoor air temperature is <br /> >25 degree F;include in equipment <br /> schedules. <br /> NA C401.3 HVAC Heating Fuel For all heating equipment,identify whether it <br /> C403.1.4 qualifies for the C403.1.4 general prescriptive <br /> path,a C403.1.4 exception,or for the C401.3 <br /> Fossil Fuel Heating path;for equipment <br /> qualifying for the C403.1.4 general <br /> prescriptive path by exception,document the <br /> exception and provide supporting information <br /> NA C401.3 HVAC Heating Fuel For projects with equipment utilizing the <br /> C403.1.4 C401.3 Fossil Fuel Heating path,provide an <br /> C406.1 accounting of the total heating capacity and <br /> the C401.3 equipment heating capacity for <br /> each distinct area utilized in the C406 <br /> calculation. <br /> NA C403.1.4 HVAC Heating Fuel, To qualify for exception 2,provide a list of <br /> exception 2 Dwelling each separate space in the dwelling or sleeping <br /> and sleeping units unit,indicate the number of exterior walls the <br /> space has,the presence of fenestration,and <br /> the allowed watts;document the heat provided <br /> in each space is below the allowed capacity in <br /> the space <br /> NA C403.1.4 HVAC Heating Fuel, To qualify for exception 5,provide <br /> exception 5 Air-to-air documentation that the heat pump is sized to <br /> heat pumps meet the heating load at an outdoor air <br /> temperature<_32°F and has a ratio of heating <br /> capacity at 47°F to supplemental resistance <br /> heat capacity>_2.0 in zone 4 and>_ 1.0 in <br /> zone 5;indicate unit control by either a <br /> thermostat designed for heat pump use,a <br /> multistage thermostat with an outdoor air <br /> temperature thermostat wired to energize <br /> supplemental heat only on the last stage or <br /> heating and when the outdoor air temperature <br /> is<_32°F,or equipment is NAECA rated with <br /> integral control <br /> Page 2132 <br />