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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: 3 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 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 Fuel Normalization Descriptions Credits - select ONE i User Notes <br />Options heating option <br />1 Combustion heating minimum NAECAb_0.0 51 <br />2 Heat pump` - - 1.0 ❑- <br />3 Electric resistance heat only -,furnace or zonal -1.0 ❑ <br />4 DHP with zonal electric resistance per option 3.4 0.5 ❑ <br />5 All other heating systems -1.0 ❑ <br />Energy Credits - select ONE <br />Options Energy Credit Option Descriptions energy option from each <br />p cate Ty <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 ❑ <br />2.1 Air Leakage Control and Efficient Ventilation 0.5 Ej] WHSIPERCOMFORT ERV <br />2.2 Air Leakage_ Control and Efficient Ventilation 1.0 ❑ <br />2.3 Air Leakage Control and Efficient Ventilation -1.5 ❑ <br />2.4 Air Leakage Control and Efficient Ventilation 2.0 ❑ <br />3.1a High Efficiency HVAC 1.0 _ 0 NAVIEN NCB-H BOILER <br />3.2 High Efficiency HVAC - Y 1.0 ❑ <br />3.3,1 High Efficiency HVAC _ 1.5 ❑ [-- -, <br />3.4 High_ Efficiency HVAC _ _-`- _ 1.5 - ❑ <br />3.5 _' High Efficiency HVAC _ 1.5 ❑ <br />3.6a High Efficiency HVAC 2.0 ❑ <br />4.1 _ High Efficiency HVAC Distribution System 0.5 ❑ <br />4.2 High Efficiency HVAC Distribution System 1.0 ❑ <br />Prescriptive Path -Single Family 2018 Washington State Energy Code-R 2 <br />