Laserfiche WebLink
OPTION DESCRIPTION CREDIT(S) <br /> 2a AIR LEAKAGE CONTROL AND EFFICIENT VENTILATION 2a: 0.5 <br /> Compliance based on R402.4.1.2: Reduce the tested air leakage to 3.0 air changes per <br /> hour maximum <br /> and <br /> All whole house ventilation requirements as determined by Section M1507.3 of the <br /> International Residential Code shall be met with a high efficiency fan(maximum 0.35 <br /> watts/cfm),not interlocked with the furnace fan.Ventilation systems using a furnace <br /> including an ECM motor are allowed,provided that they are controlled to operate at low <br /> speed in ventilation only mode. <br /> To qualify to claim this credit,the building permit drawings shall specify the option <br /> being selected and shall specify the maximum tested building air leakage and shall <br /> show the qualifying ventilation system. <br /> 2b AIR LEAKAGE CONTROL AND EFFICIENT VENTILATION 2b: 1.0 <br /> Compliance based on Section R402.4.1.2: Reduce the tested air leakage to 2.0 air <br /> changes per hour maximum <br /> and <br /> All whole house ventilation requirements as determined by Section M1507.3 of the <br /> International Residential Code shall be met with a heat recovery ventilation system <br /> with minimum sensible heat recovery efficiency of 0.70. <br /> To qualify to claim this credit,the building permit drawings shall specify the option <br /> being selected and shall specify the maximum tested building air leakage and shall <br /> show the heat recovery ventilation system. <br /> 2c AIR LEAKAGE CONTROL AND EFFICIENT VENTILATION 2c: 1.5 <br /> Compliance based on Section R402.4.1.2: Reduce the tested air leakage to 1.5 air <br /> changes per hour maximum <br /> and <br /> All whole house ventilation requirements as determined by Section M1507.3 of the <br /> International Residential Code shall be met with a heat recovery ventilation system <br /> with minimum sensible heat recovery efficiency of 0.85. <br /> To qualify to claim this credit,the building permit drawings shall specify the option <br /> being selected and shall specify the maximum tested building air leakage and shall <br /> show the heat recovery ventilation system. <br /> 3ab HIGH EFFICIENCY HVAC EQUIPMENT 3a: 1.0 <br /> Gas,propane or oil-fired furnace with minimum AFUE of 94%,or <br /> Gas,propane or oiled-fired boiler with minimum AFUE of 92% <br /> To qualify to claim this credit,the building permit drawings shall specify the option <br /> being selected and shall specify the heating equipment type and the minimum <br /> equipment efficiency. <br /> 3bb HIGH EFFICIENCY HVAC EQUIPMENT 3b: 1.0 <br /> Air-source heat pump with minimum HSPF of 9.0 <br /> To qualify to claim this credit,the building permit drawings shall specify the option <br /> being selected and shall specify the heating equipment type and the minimum <br /> equipment efficiency. <br /> 3cb HIGH EFFICIENCY HVAC EQUIPMENT 3c: 1.5 <br /> Closed-loop ground source heat pump;with a minimum COP of 3.3 <br /> or <br /> Open loop water source heat pump with a maximum pumping hydraulic head of 150 <br /> feet and minimum COP of 3.6 <br /> To qualify to claim this credit,the building permit drawings shall specify the option <br /> being selected and shall specify the heating equipment type and the minimum <br /> equipment efficiency. <br /> 3db HIGH EFFICIENCY HVAC EQUIPMENT 3d: 1.0 <br /> Ductless Split System Heat Pumps,Zonal Control:In homes where the primary space <br /> heating system is zonal electric heating,a ductless heat pump system shall be installed <br /> and provide heating to the largest zone of the housing unit. <br /> To qualify to claim this credit,the building permit drawings shall specify the option <br /> being selected and shall specify the heating equipment type and the minimum <br /> equipment efficiency. <br /> 2015 Washington State Energy Code <br /> RE <br />