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2018 Washington State Energy Code - Residential <br />Prescriptive Energy Code Compliance for All Climate Zones in Washington <br />Single Family - New & Additions (effective February 1, 2021) <br />Each dwelling unit in a residential building shall comply with sufficient options from Table R406.2 (fuel <br />normalization credits) and Table 406.3 (energy credits) to achieve the following minimum number of <br />credits. To claim this credit, the building permit drawings shall specify the option selected and the <br />maximum tested building air leakage, and show the qualifying ventilation system and its control sequence <br />of operation. <br />1. Small Dwelling Unit: > credits <br />Dwelling units less than 1,500 sf in conditioned floor area with less than 300 sf of fenestration area. <br />Additions to existing building that are greater than 500 sf of heated floor area but less than 1,500 sf. <br />2. Medium Dwelling Unit: 6 credits <br />All dwelling units that are not included in #1 or #3 <br />3. Large Dwelling Unit: 7 credits <br />Dwelling units exceeding 5,000 sf of conditioned floor area <br />4. Additions less than 500 square feet: 1.5 crecias <br />All other additions shall meet 1-3 above <br />Before selecting your credits on this Summary table, review the details in Table 406.3 (Single Family), on page 4 <br />Summary of Table R406.2 and 406.3 <br />Heating Credits - select ONE <br />Options Fuel Normalization Descriptions heating option <br />1 <br />Combustion heating minimum NAECAb <br />0.0 <br />❑ <br />2 <br />Heat pump` <br />1.0 <br />❑ <br />3 <br />Electric resistance heat only - furnace or zonal <br />-1.0 <br />❑ <br />4 <br />DHP with zonal electric resistance per option 3.4 <br />0.5 <br />0 <br />5 <br />All other heating systems <br />-1.0 <br />❑ <br />Energy <br />Credits - select ONE <br />Energy Credit Option Descriptions <br />energy option from each <br />Options <br />p <br />category <br />1.1 <br />Efficient Building Envelope <br />0.5 <br />❑ <br />1.2 <br />Efficient Building Envelope <br />1.0 <br />❑ <br />User Notes <br />1.3 <br />Efficient Building Envelope <br />0.5 <br />❑ <br />1.4 <br />I Efficient Building Envelope <br />1 1.0 <br />❑ <br />1.5 Efficient Building Envelope 2.0 ❑ <br />1.6 Efficient Building Envelope 3.0 ❑ <br />1.7 <br />Efficient Building Envelope <br />0.5 <br />❑ <br />2.1 <br />Air Leakage Control and Efficient Ventilation <br />0.5 <br />❑ <br />2.2 <br />Air Leakage Control and Efficient Ventilation <br />1.0 <br />❑ <br />2.3 <br />Air Leakage Control and Efficient Ventilation <br />1.5 <br />❑ <br />2.4 <br />Air Leakage Control and Efficient Ventilation Li <br />2.0 <br />❑ <br />3.1- <br />High Efficiency HVAC <br />1.0 <br />❑ <br />3.2 <br />High Efficiency HVAC <br />1.0 <br />❑ <br />3.3- <br />High Efficiency HVAC <br />1.5 <br />❑ <br />3.4 <br />High Efficiency HVAC <br />1.5 <br />0 <br />3.5 <br />High Efficiency HVAC <br />1.5 <br />❑ <br />3.61 <br />High Efficiency HVAC <br />2.0 <br />❑ <br />4.1 <br />High Efficiency HVAC Distribution System <br />0.5 <br />❑ <br />4.2 <br />High Efficiency HVAC Distribution System <br />1.0 <br />❑ <br />Prescriptive Path - Single Family 2018 Washington State Energy Code-R 2 <br />