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Washington State Energy Code 2009 <br /> Heating Sytstem Sizing - Climate Zone 1 <br /> Builder-Tami Kesl File:151 Prepared by: Dennis Smiley <br /> Plan -Garage Conversion Home Design 360-658-3302 <br /> Design Temp Difference Indoor-Outdoor Design Temp= 70-21 49 <br /> Conditioned Volume (Lower Floor x H)+ (Upper Floor x H) 4224 <br /> Conditioned Floor Area Lower Floor+ Upper Floor 528 <br /> Vertical Glazing Area Windows and Glass Doors 41 <br /> Glazing Percentage Vertical Glazing/Floor Area =41 /528 7.77 <br /> Table 6-1 for Climate Zone 1 (Option based on Glazing Percentage) <br /> Above Below Below <br /> Option Glazing/ Vertical Overhead Door Ceiling Vaulted Grade Grade Grade Floor Slab <br /> Floor/° U-Factor U-Factor U-Factor Wall Int Ext Floor <br /> 0 13% 0.34 0.50 0.20 STD R49 R-38 R-21 R-21 R-10 R-30 R-10 2Ft <br /> UA Totals <br /> Component Area rU-Factor UA <br /> Vertical Glazing 4_11F77__ 0.3411 13.9 <br /> Exterior Doors 20]1 0.21 4.0 <br /> Overhead Glazing 4 0.5 1 2.0 <br /> Ceiling -STD R49 528 0 0-2711 14.3 <br /> Above Grade Walls 6751F- 0.05611 37.8 <br /> Framed Floors 011 0.0 <br /> Slab on Grade Floors (L) 921F 49.7 <br /> Total UA 121.7 <br /> Heating System Sizing by BTU/HR <br /> Envelope Heat Load Total UA x Design Temp Difference 5,963.3 <br /> Air Leakage Load Volume x 0.6 x Temp Difference x 0.018 2,235.3 <br /> Building Design Heat Load Envelope Load+Air Leakage Load 8,198.6 <br /> Add Duct Load Factor Building Load x 1.15 9,428.4 <br /> Maximum Heat Equipment Output Total Building Load x 1.5 14,142.6 <br /> Chapter 9 Credit Options (Min One Credit Required) <br /> 1a -HIGH EFFICIENCY HVAC EQUIPMENT 1: Gas, propane or oil-fired furnace or boiler with minimum AFUE <br /> of 92%, or Air-source heat pump with minimum HSPF of 8.5. (1 Credit) <br />