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0 0 <br />Prescriptive EnerKV Code Compliance for rill Climate Zones in Washington <br />Single Family - New & Additions (effective Februarys 1 2021) <br />Tabie +406.3 - p!► rjaCredrts [single FamiM <br />opfion Description Credits:sF <br />3. HIGH EFFICIENCY HVAC EQUIPMENT OPTIONS <br />Only one option from Items 3.1 through 3.6 may be selected in this €ategory_ <br />3.1 2 <br />Energy Star rated {US. North) Gas or propane furnace with, minimum rAFUE of 95% or <br />1.0 <br />Energy Star rated (US. North) Gas or propane boiler with minimum AFUE of 90%. <br />3.2 <br />Air -source centrally ducted heat pump with minimum HSPF of 9.5.' <br />1.0 <br />Ciosed-loop ground source heat pump; with a minimum COP of 3.3 or <br />3.3' <br />Open loop water source heat pump with a maximum pump ing hydraulic head of 150 feet <br />1.5 <br />and minimum GOP of 3.6.'' <br />Ductless mini -split heat pump system, zonal control: In homes where the primary space <br />heating system is zonal electric heating a ductless mini -split heat pump system with a <br />3'A <br />minimum HSPF of 10.0 shall be installed and provide heating to the lamest. zone of the <br />i'S <br />housin unit. { <br />3.52 <br />Air -source, central ly ducted heat p ump with minimum HSPF of 11.0.' <br />1.5 <br />Ductless split system heat pumps with no electric resistance heating in the primary living <br />areas. A ductless heat pump system with a minimum HSPF of 10 shall be sized and <br />installed to provide heat to entire dwelling unit at the design outdoor air temperature_ <br />3.6 2 2.0 <br />To qualify to claim this credit, the building permit drawings shall specify the option being <br />selected,. the heated floor area calculation, the heating equipment type(st the minimum <br />equipment efficiency; and total installed heat capacitq_jbf!t uiement type;i. <br />An altemati�re heating source sized at a maximum of 0.5 W.Isf{equivalent; of heated floor a�,}a -or 500 W, whichever is <br />bigger, mat be installed in the dwelling unit. <br />To qualify to claim thiscredit, the building permit drawings shall specifythe option being selected and shall specify <br />the heating eq uipment type and the minimum equipment efficiency- <br />4 To qualify to claim this credit, the building permu draws shall specify The oPtion wing selected and shalt specify <br />the heating equiprnentt1pe andt�►e minimum equiprrtnt eficancy_. <br />4. HIGH EFFICIENCY HVAC DISTRIBUTION SYSTEM OPTION5 <br />All supply and return ducts located in an unconditioned attic shall be deeply b i r _d in <br />ceiling insulation in accordance with Section R403.3.3. j <br />For mechanical equipment located outside the conditioned space, a maximum of 201inear i <br />Peet of return: duct and 5 linear feet of supply duct connections to the equipment may be <br />outside the deeply buried insulation. All metallic ducts located outside the conditioned <br />A'1 space must have both transverse and longitudinal joints sealed with mastic f flex drtts 0.5 <br />are used, they cannot contain splices. <br />Duct leakage shall be limited to 3 cfm per 100 square feet of conditioned floor area. <br />Air handlers) shall be located within the €on&i ned space_ <br />H .,ABC equipment and associated duct system(s) installation shall comply with the <br />requirements of Section R4033.7. <br />Locating system components in conditioned crags! =paces is noT permitted under this <br />option. <br />Electric resistance heat and ductless heat pumps are net permitted under this option. <br />4.2 <br />1.0 <br />Direct combustion heating equipment with A=UE less than 804 is not permuted under this <br />option. <br />To qualify to claim this credit, the buildingpermit drawings sha11 specify the option being <br />sele..-ted and shall specify the heating equipment type and shal sho4ti°the ocation of the <br />heating and cooling equip ment and all the ductwork. <br />— <br />_...._I <br />Prescrip#re Path - C ige Farr,ir 201 E_ Washingty Mate Energy coue-= <br />