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� ( � . �� <br /> . ; <br /> , <br /> � � r,�v y � � <br /> � .. � . .. . -. . �-� S� <br /> i �;�;' � � 1997 WSEC� � � <br /> . . s?"�:��� �n il .:±�". ^ , . • <br /> � <br /> . ' J � rr 4� i � � " ' <br /> ,.�''..: v., <br /> i Instructions: <br /> iA. The following stepa will determine the maximum heating sysbm size: <br /> � 1. Shuctural loss, value(1): May be taken directly from the Proposed UA box on Page 2. <br /> 2. Air leakage loss,Value(2): This is the volume(Ft')of the condiHoned space in the dwelling. <br /> 7. Duct Loss, value(3): Insert value hom BTU/HR, Box(a).Climate Factor, <br /> � 4. eT:The local ASHRAE climate factor is °F for yourjurisdiction <br /> i To determine�T: (dT=the femperature diBerence behveen Outdoordesign temperature and <br /> Indoor Design Temperature). The heating or cooling Outdoor Desgn Temperetures shaU be I <br /> ( selected hom 0.6%column for winter and 0.5%column for summer from the Puget Sound � <br /> � Chapter of ASHRAE publication'Recommended Outdoor Design Temperatures,Washington <br /> State, ASHRAE.). Indoor Design Temperature shall be 70 °F for heating and 78°F for cooling. <br /> ', Example: For Elma,WA:Wlnt�r <br /> Indoor Design Tempsraturo ■70'F <br /> ;, Outdoor Dasfgn T�mpenturo ■24•F <br /> '� ...so... (70•F►{21•F)=46eT <br /> S. Caiculate values a, b, and c by multiplying the numbers in each horizontal row. <br /> 6. Add values a, b, and c. <br /> j 7. Multiply the sum from Step if&by 2.0 to obtain the maximum heating system output for the buiiding. <br /> ' S. If the heating system is electric, divide the B7U/Fv. value from Step#7 by 3413 to get kWatt output. <br /> I <br /> i Heat loss path Valuss.+�ft•, 1�,� �Y` AT� {�-` <br /> i Structuralloss (1) .2�/(BTU/Hr/F) x �b = ■ O��) <br /> !o <br /> � Air leakage loss (2) �� 6,¢Z (R3) z d` x .80 x 0.018 ���6. (b) <br /> �� l�l � <br /> � Ductlosses (3)f �.�(BTU/HdF) v?������ x .20 �� 'hL <br /> � <br /> w�. <br /> � <br /> � 'k� � , s;�,,� <br /> ; � ' "� Dwiyn Hwt Load(D.H.L.) � � Z�J .� <br /> I � .� �.;�r !S:'� (a�b*c) ' (BTU/Hr) <br /> �;ii�f;;�,., ., �::� <br /> .,��-�,:r, .:>•:+x <br /> _,r:, <br /> � �.� `� � , <br /> �•u"•y Maxlmum NeaHny Output �rp I <br /> �1il+nuheWnr ':. (G�s, oll�P►oPaM, wood) r� �A 2..�7��1�� <br /> ;:?rP.:a sy.am � , :.� (Wsiyn Heat/oad x 2.0) (BTUlHr) II <br /> i�tYh��Ou uC ''_'°�i <br /> ..D P <br /> ..s <br /> ���y' .Btu1Hr. 'a±: OR <br /> ;IVoN.:. �i � <br /> �.:: . ;'; Max(mum Headnp Output <br /> ' ''`�` (EbcMc, heat pumpsl n <br /> �II ��-. �'����. / <br /> ' ,�. '��, '" �,. (D. H. L X 2.0=3413) ' (kWatts) <br /> f. ��.... <br /> w,rrr� <br /> �� <br />