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'ermit No. <br />Use only for additions, under 750 1`12, that don't comply <br />Effective July 1, 1991 <br />PURPOSE: This worksheet demonstrates compliance for a'F <br />Proposed addition where heat loss impmvements in the existing <br />home receive credit toward compliance. Perform a Chapter 5 Existing dwelling a n d <br />calculation only on the addition before using this form. :mprovement U-values: <br />MAIN WORKSHEET <br />PROPOSED CASE UA VALUE (pg. 2) <br />I BASE CASE UA VALUE (pg. 2) <br />Additiodeficit (bcr 1 minus box 2) <br />Existing dwelling improvement credit. See& <br />ADDITION COMPLIES IF BOX 4 IS GREATER THAN BOX 3 <br />Existing Dwelling Improvement credit <br />calculations (List separate improvements) <br />Change (iecatinn) Area (Ft2) <br />Existing glazing <br />Refer to the 1991 WSEC, Chapter 10, <br />for all U•values not listed below. <br />Existing (untested) glazing default <br />values: <br />Single pane U 1.20 <br />Double pane 'U .90 <br />Doubld pane w/vinyl <br />or wood sash U .75 <br />Existing building envelope values: <br />Ceilings w/no insulation U .30 <br />Floors w/no insulation U .13 <br />Walls w/no insulation U .31 <br />Glass block U .60 <br />x U— <br />(a) <br />Replacement glazing ( ) <br />x U— <br />(b) <br />.Existing home Improvement credit <br />5UBTRACT(b) from ja) <br />(c) <br />Existing glazing ( ) <br />x U_ <br />(d) <br />Replacement glazing ( ) <br />x U— <br />(e) <br />ExlstinI home Improvement credit <br />SUBTRACT.(e) from (d) <br />(f) <br />Existing insulation ( _) <br />x U— <br />(g) <br />New insulation ( ) <br />x U— <br />(h) <br />ExIstIng home Improvement credit <br />3SCfgTfiCTq �(9% <br />- s <br />(I) <br />Existing insulation ( _) <br />. . <br />x U— <br />(j) <br />New insulation ( ) <br />x U_ <br />(k) <br />ExIstIng home Improvement credit <br />SUBTRACT (k) from '6) <br />(I) <br />TOTAL CREDITS (Add c, I, i, & t. Insert into Ron MAIN WORKSHEE7) <br />F <br />