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Home My WebLink AboutBLD2021-00360-03- Energy Worksheet2018 Washington State Energy Code – Residential Prescriptive Energy Code Compliance for All Climate Zones in Washington Prescriptive Path – Single Family 2018 W ashington State Energy Code-R 1 Project Information Contact Information Instructions: This single-family project will use the requirements of the Prescriptive Path below and incorporate the minimum values listed. Based on the size of the structure, the appropriate number of additional credits are checked as chosen by the permit applicant. Authorized Representative Date n/a n/a Ceiling e 49 j 0.026 W ood Frame W all g,h 21 int 0.056 Floor 30 0.029 Below Grade W all c,h 10/15/21 int + TB 0.042 Slab d,f R-Value & Depth 10, 2 ft n/a a R-values are minimums. U-factors and SHGC are maximums. W hen insulation is installed in a cavity that is less than the label or design thickness of the insulation, the compressed R-value of the insulation from Appendix Table A101.4 shall not be less than the R-value specified in the table. b The fenestration U-factor column excludes skylights. c "10/15/21 +5TB" means R-10 continuous insulation on the exterior of the wall, or R-15 continuous insulation on the interior of the wall, or R-21 cavity insulation plus a thermal break between the slab and the basement wall at the interior of the basement wall. "10/15/21 +5TB" shall be permitted to be met with R-13 cavity insulation on the interior of the basement wall plus R-5 continuous insulation on the interior or exterior of the wall. "5TB" means R-5 thermal break between floor slab and basement wall. g For log structures developed in compliance with Standard ICC 400, log walls shall meet the requirements for climate zone 5 of ICC 400. h Int. (intermediate framing) denotes framing and insulation as described in Section A103.2.2 including standard framing 16 inches on center, 78% of the wall cavity insulated and headers insulated with a minimum of R-10 insulation. These requirements apply to all IRC building types, including detached one- and two-family dwellings and multiple single-family dwellings (townhouses). Provide all information from the following tables as building permit drawings: Table R402.1 - Insulation and Fenestration Requirements by Component, Table R406.2 - Fuel Normalization Credits and 406.3 - Energy Credits. All Climate Zones (Table R402.1.1) R-Value a U-Factor a Fenestration U-Factor b n/a 0.30 Skylight U-Factor b n/a 0.50 Glazed Fenestration SHGC b,e d R-10 continuous insulation is required under heated slab on grade floors. See Section R402.2.9.1. e f R-7.5 continuous insulation installed over an existing slab is deemed to be equivalent to the required perimeter slab insulation when applied to existing slabs complying with Section R503.1.1. If foam plastic is used, it shall meet the requirements for thermal barriers protecting foam plastics. For single rafter- or joist-vaulted ceilings, the insulation may be reduced to R-38 if the full insulation depth extends over the top plate of the exterior wall. Single Family – New & Additions (effective February 1, 2021) RECEIVED BY DCD 9/30/2021 09/14/2021 Parcel: 932200702 Simon Little, StudioSTL simon@studio-stl.com 2018 Washington State Energy Code – Residential Prescriptive Energy Code Compliance for All Climate Zones in Washington Prescriptive Path – Single Family 2018 W ashington State Energy Code-R 2 2. Medium Dwelling Unit: 6 credits All dwelling units that are not included in #1 or #3 3. Large Dwelling Unit: 7 credits Dwelling units exceeding 5,000 sf of conditioned floor area 4. Additions less than 500 square feet: 1.5 credits All other additions shall meet 1-3 above Before selecting your credits on this Summary table, review t he details in Table 406.3 (Single Family), on page 4. Summary of Table R406.2 Heating Options Fuel Normalization Descriptions Credits - select ONE heating option User Notes 4 DHP with zonal electric resistance per option 3.4 0.5 5 All other heating systems -1.0 Energy Options Energy Credit Option Descriptions Credits - select ONE energy option from each category d 1.3 Efficient Building Envelope 0.5 1.5 Efficient Building Envelope 2.0 1.6 Efficient Building Envelope 3.0 1.7 Efficient Building Envelope 0.5 2.1 Air Leakage Control and Efficient Ventilation 0.5 2.2 Air Leakage Control and Efficient Ventilation 1.0 2.3 Air Leakage Control and Efficient Ventilation 1.5 2.4 Air Leakage Control and Efficient Ventilation 2.0 3.1a High Efficiency HVAC 1.0 3.2 High Efficiency HVAC 1.0 3.3a High Efficiency HVAC 1.5 3.4 High Efficiency HVAC 1.5 3.5 High Efficiency HVAC 1.5 3.6a High Efficiency HVAC 2.0 4.1 High Efficiency HVAC Distribution System 0.5 4.2 High Efficiency HVAC Distribution System 1.0 1.2 Efficient Building Envelope 1.0 1 Combustion heating minimum NAECAb 0.0 1.1 Efficient Building Envelope 0.5 1.4 Efficient Building Envelope 1.0 2 Heat pumpc 1.0 3 Electric resistance heat only - furnace or zonal -1.0 1. Small Dwelling Unit: 3 credits Dwelling units less than 1,500 sf in conditioned floor area with less than 300 sf of fenestration area. Additions to existing building that are greater than 500 sf of heated floor area but less than 1,500 sf. Single Family – New & Additions (effective February 1, 2021) Each dwelling unit in a residential building shall comply with sufficient options from Table R406.2 (fuel normalization credits) and Table 406.3 (energy credits) to achieve the following minimum number of credits. To claim this credit, the building permit drawings shall specify the option selected and the maximum tested building air leakage, and show the qualifying ventilation system and its control sequence of operation. RECEIVED BY DCD 9/30/2021 l l 2018 Washington State Energy Code – Residential Prescriptive Energy Code Compliance for All Climate Zones in Washington Prescriptive Path – Single Family 2018 W ashington State Energy Code-R 3 Summary of Table R406.2 (cont.) Energy Options Energy Credit Option Descriptions (cont.) Credits - select ONE energy option from each category d User Notes 5.1d Efficient Water Heating 0.5 5.2 Efficient Water Heating 0.5 5.3 Efficient Water Heating 1.0 5.4 Efficient Water Heating 1.5 5.5 Efficient Water Heating 2.0 5.6 Efficient Water Heating 2.5 6.1e Renewable Electric Energy (3 credits max) 1.0 7.1 Appliance Package 0.5 Total Credits a. An alternative heating source sized at a maximum of 0.5 W/sf (equivalent) of heated floor area or 500 W, whichever is bigger, may be installed in the dwelling unit. b. Equipment listed in Table C403.3.2(4) or C403.3.2(5) d. You cannot select more than one option from any category EXCEPT in category 5. Option 5.1 may be combined with options 5.2 through 5.6. See Table 406.3. c. Equipment listed in Table C403.3.2(1) or C403.3.2(2) e. 1.0 credit for each 1,200 kWh of electrical generation provided annually, up to 3 credits max. See the complete Table R406.2 for all requirements and option descriptions. Single Family – New & Additions (effective February 1, 2021) RECEIVED BY DCD 9/30/2021 l 4.5 CLEAR FORM Please print only pages 1 through 3 of this worksheet for submission to your building official.