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I <br /> � . _, . ....,. _ ,,..�� ..,; .�,, . .,::- � <br /> w. � ...i ��,'��6. <br /> 1997 WSEC Residential Deaign Heat L"oad+Form;= ` °' <br /> <; <br /> Instructions: <br /> A. The following steps will detennine the maximum heatlng system size: <br /> 1. Structural loss, value(7): May be taken directly from the Proposed UA box on Page 2. <br /> 2. Air leakage loss, Value(2): This is the volume(FP)of the conditioned space in the dwelling. <br /> 3. Duct Lcss, value(3): Insert value from BTU/HR, Box(a).Climate Factor, <br /> 4. eT: The local ASHRAE climate factor is °F for your Jurisdiction <br /> To determine AT: (dT=the femperafure di8erence behveen Outdoordesign temperature end <br /> Indoor Desrgn Temperafure). The heating or cooling Outdoor Design Temperatures shell be <br /> selected from 0.6°/a column for winter and 0.5°h column for summer from the Puget Sound <br /> Chapter of ASHRAE publication'Recommended Outdoor Design Temperatures,Washington <br /> State, ASHRAE.). Indoor Design Tempereture shall be 70 °F for heating and 78°F for cooling. <br /> Example: For Elma,WA:Winter <br /> Indoor Dasign Tempsnturo =70'F <br /> Outdoor Deaipn Temper�ture a24'F <br /> ...so... (70'F�-�24'F)■48 AT <br /> b. Calculate vatues a, b, and c by mulNplying the numbers in each horizonWl row. <br /> 8. Add vatues a, b, and c. <br /> 7. Multiply the sum from Step i1S by 2.0 to obtain the mazimum heating system output for the building. <br /> 8. It the heating system is electric, divide the BTUIhr. value from Slep#7 by 3413 to get kWatt output. <br /> Neat loss path Values eT ACH Facton BTU/Hr <br /> Structurelloss (1) (BTU/HdF) x _;; '; i ' _ (�) <br /> Air leakage loss (2) (ft3) x x�.60 x 0.018 = (b) <br /> Duct losses (3) (BTUMdF) : f,!* :�y x .20 = (�) <br /> --�— <br /> P�rmit No. <br /> N�m� <br /> yi,,,i Deslpn Heat Load(D.H.L) <br /> �or� �e+b�Q� ? (BTU/Hr) <br /> citi <br /> Counry <br /> PhonA <br /> Maxlmum Heatlnp Output <br /> Manut.ceunr (Gas, 0l1,propane, wood) � <br /> Typ�of syaum (Deslgn Heat load x Y.OJ (BTU/Hr) <br /> Modd� <br /> Heating Ouput: <br /> � OR <br /> Btu/Hr. y <br /> Notes: <br /> Maxlmum Heatlnp Output <br /> (Eleebfc, heat pumpa) ? <br /> - _ (D. H. L.XY.O =3413J (kWatta) <br /> •� �. <br /> w.iwr.RMM <br /> 2�0 <br />