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�rmit No. <br />Heat source: ELECTRIC (except heat pumps), Zone 1 <br />Instructions <br />Eftective July 1, 1991 <br />Overview The Chapter 5 Approach allows any combination of buiiding envelope components as long as the <br />collective heat loss doesn't exceed a maximum limit established by code. The calculations on the lower part oi this <br />page may be ignored if below grade wali insulation will either be R19 on the interior or R10 exlerior, or if the <br />basement will not be a habitable space and unheated, and the iloor above is insulated. <br />Page 2, Dase Case Dweiling Calculation Compute areas using outer surtaces tor walis, ceilings (less skylights), <br />and tloors. Use the rough (ramed opening areas for doors. The glazing area is derived by muitiplying a constant <br />value (.15) by the sum of the conditioned floor areas(Don't i�clude unheated attached yarages, etc). <br />Page 2, Proposed Dwetling Calculatlon Compute areas using outer suAaces for walis, ceilings, and (loors. Use the <br />rough iramed opening areas for doors and glazing. Since ihere are only tour boxes on the torm for glazing, combine <br />thE areas ot uniis with the same Uo value into a single entry. WSEC, Chapter 10, defauit values must be used tor all <br />wails, ceiiings, tloors, untested doors/glazing, and to determine below-grade walVslab UA. <br />The Proposed Dwelling complys if the the ?roposed UA doesn't ezceed the Base Case UA. <br />Transfer wall, celling, fioor; glazing; and door values (R and U) to the Check7lsL � <br />� `Metho <br />1: For each <br />2. Deterrpin <br />them 3rt <br />3..F ttd,lhe <br />+t�ulppiy , <br />4. Meaecre <br />a� A(below-grade waJl/slab heat-loss tradeoffs) <br />Nali ihat differs in depth, perform a sepera[e calculation using Steps 2& 3, Sum ihe totals. <br />i wall araa from the siab sudaCe o the top ot the mud Sill. ExclUde dQor and yi�zing areas antl insa�t <br />the �esignated boxes below tof�oth Base case and f�roposed heatAss. < <br />o ropriate walf depths in T ble 1 nd insert the co�re ponding wall values inro the Base casebo�,(es). <br />i�c�correspondina wall U-va�ue by t�ie area denved m�iep aii. : <br />iie erim t r distance ln lin ar feet for each slab under a�.vail wdh a difierent Table 1 Jepth Insert the <br />ue �rom l�a�le 1 corresponding do each wall lisied inStep #3. <br />IBASE C.�SE HEATLOSS � -' '� , <br />B.G. wall #1 <br />B.G. slab #1 <br />B.G. wali #2 <br />B.G. slab #2 <br />(Ft2) x U _ _ <br />(L. Ft) x F_ _ <br />(Ft2) x U._ _ <br />(L. Ft) x F_ _ <br />TOTALCOLUMN —► <br />�, ■�..�.. <br />; PROPOSED FIEATLOSS <br />Use Chapter 10, page 61, U& F-values for this calculation <br />I and ihe same BASE CASE area/L. fl. measurements. <br />B.G. wall #1 <br />B.G. slab #1 <br />BIGi w�ll #2;, �:'_� �' <br />B.G. slab ;t2 <br />�<Y�kbbdU'r�bthti :x: <br />Page i <br />(Ft2) x U_ _ <br />(L. Fq x F_ _ <br />�., ':(Fl2) x U_ _ <br />(�. FQ x F_ _ <br />TOTALCOLUMN <br />TBble 1 (Beiow grade wall/slabs) <br />In�l�d Interlor w�(I Values <br />2' depth: wal/s <br />slab <br />3.5' depth: walls <br />slab <br />7' depth: walls <br />slab <br />2' depth: walls <br />slab <br />3.5' depth: �valls <br />slab <br />7' depth: walls <br />slab <br />U.043 <br />F.69 <br />U.041 <br />F.64 <br />U.037 <br />F.57 <br />U.070 <br />F.60 <br />U.064 <br />F.57 <br />U.056 <br />F.42 <br />('Ocplh' indicatos tho �otal r.oncroto wall deplh <br />including not more Ihan 6' ot above gradc <br />A <br />