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<br /> � � �.,, Heat source: ELECTRIC (except heat pumps), Zane 1 ,
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<br /> Insfructions Effective July 1, 1991
<br /> Overvlew The Chapter 5 Approach allows any combination of building envelope components as long as the
<br /> collective heat loss doesn't exceed a maximum limit established by code. The calcuiations on the lower part of this
<br /> page may be ignored it below grade wall insulatfon will either be R19 on ihe interior or R10 e�erior,or H the
<br /> basement will not be a habitabie space and unheated, and the tloor above is insulated.
<br /> Page 2, Base Case Dweiling Calculation Compute areas using outer surfaces for walls, ceilings (less skylights),
<br /> and fbors. Use the rough framed opening areas tor doors.The glazing area is derived by multiplying a constant
<br /> value (.15) by ihe sum of the conditioned floor areas(Don't include unheated attached garages, etc).
<br /> Page 2, Proposed Dwelling Calculation Compute areas using outer surtaces for walls,ceilings, and(loors. Use the
<br /> rough framed opening areas for doors and glazing. Since there are only four boxes on the form for glazfng,combine
<br /> the areas of units with ihe same Uo vaiue into a single entry. WSEC, Chapter 10,default values must be iised!or all
<br /> walls, ceilings,floors, untested doors/glazing, and to determine below-grade walVslab UA.
<br /> The P.roposed Dwelll�g cotnpiyS If the the Proposed UA doesn't ie�cceed the Base Case UA.
<br /> Tfanster wall,ce0ing,flaot,giazfng, snd door values(R a�d U)to the Check lfst.
<br /> M�fh�#d A jbelow gra�/� wa!!/sl�b'heat-loss�ft'ad�o�fs� .; ' _ .
<br /> ,i For�ach watt fnat iLffers�n deptia,periorm a sepe�ate caloulation�s�ng Steps Z&;3 Sum!rie tot�fs ! . , ;
<br /> ..2 pet�r�r�ie�vail sr�a ir�m�t�`:alar,�s�r�a��atne op ot the mu��1q �ac��e t3�or and gtaxing are� and lnsert
<br /> �h�m n o e des.gn� xes w,ar oth�ase case an ropos, eat ss
<br /> a nd tns�p ropdate w it'depthst Tabie y ntl lnsert tns corres�ontl rig wall tia�ues into t�te Hase�ese dax(ssj
<br /> �ultipry ilt��tirfesponding walt �.�value by`f�e area denved in Step�1.
<br /> 4 �ea rR�be�er�rr�t$fiit�srance in��n�ar feet for�eacn�I�b ntl�gr a +�11 w�th�dd�erent 7'abfe h cte�th ;Insert ihe ; ;,
<br /> �ab�u�,u� rom„ a e carrespan ,ng to each watl I�s ed�n tep : t '
<br /> > _ „
<br /> -_.. ;. ; • � ..�.:���� :
<br /> .:; BASE CdSE HEATLOSS • � ""�"" �`
<br /> ; B.G.wall#1 (Ft2) x U_ _ �' Table 1 (Below grade wallislabs)
<br /> �
<br /> ; B.G. slab#1 (L. Ft) x F_ _ _ ': Inculated InteNor wall Values �;``
<br /> >".
<br /> �: B.G.wall#2 (Ft2) x U_ _ �. 2' depth: walls U.043 ;
<br /> �;
<br /> ``: B.G. slab#2 (L. Ft) x F_ = slab F.69 �;
<br /> � 3.5'depth: walls U.041 ;
<br /> 3�L �>zfl ;�.���,�r� ',� TOTALCOLUMN --► `; Slab F.64 �'
<br /> z ;,�� 7'depth: walls U.037 �'�
<br /> ' �'�'&RJa 5 s"�n,�. .a��..ss � �.:�:. �.
<br /> ,�. � ,..<..:� ..� .. ..:.�:.;. . .,:<,. �:.. ,
<br /> � PROPOSED HEATLOSS � ; slab F.57 ,�
<br /> �a� Use Chapter 10, page 81, U& F-values for this calculation �" �na�lat d xt rlor wall �u:
<br /> :,y
<br /> y:� and the same BASE CASE area/L.ft. measurements. � ' ' ;
<br /> 2'depth: walls U.070 =�
<br /> "�: B.G.wall#1 (Ft2) x U_ _ � � slab F.60 -
<br /> �.; .
<br /> 3.5'depth: walls U.064 �
<br /> �r? B.G. slab#1 (L. Ft) x F_ _ � ; slab F.57
<br /> �3 B.G.wall#2 (Ft2) x U_ _ . 7'de th: walls U.056
<br /> P
<br /> �„` slab FA2
<br /> I B.G. slab #2 (L. Ft) x F_ _
<br /> (•Dopth•indicates the total concrete wall depth
<br /> a'.:. TOTAL COLUMN Including not more than s• of above grade
<br /> ;`Page 1 ,.'
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