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2018 Washington State Energy Code - Residentiu. <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: 3 <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: nits <br />All dwelling units that are not included in #1 or #3 <br />3. Large Dwelling Unit: 7 <br />Dwelling units exceeding 5,000 sf of conditioned floor area <br />4. Additions less than 500 square feet: 1.5 credits <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 <br />Heating Credits -select ONE User Notes <br />Options Fuel Normalization Descriptions heating option <br />1 Combustion heating minimum NAECAb J::0. I ❑ <br />2 Heat pump <br />1.0 � 0 <br />3 Electric resistance heat only - furnace or zonal -1.0 �Ir_ ❑ <br />4 DHP with zonal electric resistance per option 3.4 � 0.5 ❑_ <br />5 All other heating systems_ -1.0 L ❑ _ <br />Energy Credits -select ONE <br />Energy Credit Option Descriptions energy option from each <br />Options) _ category <br />1.1 Efficient Building Envelope 0.5 ❑ <br />1.2 Efficient Building Envelope 1.0 ❑ <br />1.3 Efficient Building Envelope 0.5 <br />1.4 Efficient Building Envelope 1.0 ❑ <br />1.5 Efficient Building Envelope 2.0 ❑ <br />1.6 Efficient Building Envelope 3.0 ❑ <br />1.7 Efficient Building Envelope 0.5 0 <br />2.1 iAir Leakage Control and Efficient Ventilation ti.0 <br />❑ <br />2.2 _ Air Leakage Control and Efficient Ventilation 0 _ <br />2.3 Air Leakage Control and Efficient Ventilation ❑2.4 Air Leakage Controland Efficient Ventilation ❑3.1a HighEfficiency HVAC _ _ ❑3.2 High Efficiency HVAC ❑ <br />3.3a High Efficiency HVAC 1.5 ❑ <br />3.4 High Efficiency HVAC 1.5 ❑ <br />3.5 High Efficiency HVAC _ 15 <br />3.6a High Efficiency HVAC 2.0_ ❑ <br />4.1 High Efficiency HVAC Distribution System I 0.5 _❑ <br />4.2 High Efficiency HVAC Distribution System C 1.0 ❑ <br />Prescriptive Path - Single Family 2018 Washington State Energy Code-R 2 <br />