1018 91ST PL SW 2025-07-21 - Laserfiche WebLink

le Heating System Size: Washington State ating system sizing calculator is based on the Prescriptive Requirements of the 201E Washington State Energy Code (WSEC) and ACCA s J and S. This tool will calculate heating loads only. ACCA procedures for sizing cooling systems should be used to determine cooling loads. complete the green drop -downs and boxes that are applicable to your project. As you make selections in the drop -downs for each section, some will be calculated for you. If you do not see the selection you need In the drop -down options, please contact the WSU Energy Program at code@energy.wsu.edu or (360) 956-2042 for assistance. True Everett WA 98204 I 1 Il c ❑ti n tl:; yC. Le t It Iyll e: O All Other systems OO Heat Pump To see detailed instructions for each section, place your cursor on the word "Instructions" Design Temperature „stmrtim's ] Design Temperature Difference (AT) 47 Eevett lC �I AT= Indoor (70 degrees)- Outdoor Design Temp Area of Building Conditioned Floor Area Instructions Conditioned Floor Area (sq ft) Average Ceiling Height h suuctions Average Ceiling Height (ft) Glazing and Doors Instructions rr Lit U0.28 � ie Skylights nstludimrs Insulation Attic Instru,lons LR EJ Single Rafter or Joist Vaulted Ceilings Istruetloos Select R Value Above Grade Walls (see Figure 1) Instuctions R 21 ln1r,u1rdW1 Floors Irsti uclians 9.38 Below Grade Walls (see Figure l) Select R value Slab Below Grade (see Figure 1) _.—n.:uons Srlrct conditioning Slab on Grade (see Figure 1) Instructions I Select R value _... _ ____ __ _J Conditioned Volume 8.0 13,728 . U-Factor X Area - UA 0.280 287 80.42 U-Factor X Area = UA 0.50 F-761 8.00 U-Factor X Area = UA 0.026 1,716 44.62 U-Factor X Area No selection C� U-Factor X Area 0.056 1,487 U-Factor X Area I J 0.025 1716 U-Factor X Area No selection F-Factor X Length I �J No selection F-Factor X Length No selection 0 UA UA 83.27 UA 42.90 UA Location of Ducts Instruotfo In j — I Duct Leakage Coefficient luncondiuoned Space - 1.10 Figure 1. _I Above Geue ''l Below Grade. UA UA Sum of UA 259.20 Envelope Heat Load 12,183 Btu i Hour Sum of UA x AT Air Leakage Heat Load 6,968 Btu I Hour Volume x 0.6 x AT x 0.018 Building Design Heat Load 19,151 Btu I Hour Air leakage + envelope heat loss Building and Duct Heat Load 21,066 Btu I Hour Ducts In unconditioned space: sum of building heat loss x 1.10 Ducts In conditioned space: sum of building heat loss x 1 Maximum Heat Equipment Output 26,333 Btu i Hour Buildino and duct heat loss x 1.40 for forced air furnace Buildino and duct heat loss x 1.25 for heat pump (07101113)