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Instructions <br />P-•mit No. <br />_t�'t 'rtr•t ;.rr <br />Heat source: OTHER (gas, oil, propane, he,a pumps), Zone 1 <br />Effective July 1, 1991 <br />Overview The Chapter 5 Approach allows nnv combination of building 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 of this <br />page may be Ignored if below grade wall Insulation will either be R19 on the interior or Fit exterior, or it the <br />basement will not be a habitable space and unheated, and the floor above is Insulated. <br />Page 2, Base Case Dwelling Calculation Compute areas using outer surfaces for walls, ceilings (less skylights), <br />and floors. Use the rough framed opening areas for doors. The glazing area is derived by multiplying a constant <br />value (.15) by the sum of the conditioned floor areas(Don't Include unheated attached garages, etc). <br />Page 2, Proposed Dwelling Calculatlon Compute areas using outer surfaces for walls, ceilings, and floors. Use the <br />rough framed opening areas for doors and glaz'ng. Since there are only four boxes on the form for glazing, combine <br />the areas of units with the same Uo value Into a single entry. WSEC, Chapter 10, default values must be used for all <br />walls, ceilings, floors, untested doors/glazing, and to determine below -grade wall/slab UA. <br />The Proposed Dwelling complys If the the Proposed UA doesn't exceed the Base Case UA. <br />Transfer wall, calling, floor, glazing, and door values (R and U) to the Check list. <br />Method A (below -grade wall/slab heat -loss tradeoffs) <br />1. For each wall that differs in depth, perform a seperate calculation using Steps 2 & 3. Sum the totals. <br />2 Determine wall area from the slabs daps to the lop of the mug III. Exclutle door and glazing areas and Insert <br />them nto the designated boxes be�ow for both Base case and reposeU heatless. <br />3. Find-t the rate w�l) depths in T�ble 1 and insert the c�rreEonding wall values into the Base case box(es). <br />Mu�tttlp y tna c rrespon Ing wall U va uo by the area denve instep #L <br />4. Mea uro ho eririW distance in finQar feet for each blab U r a wall with a different Table 1 depth. Insert the <br />slab f -va�ue t°rom l able 1 correspoOng to each wall listed In Siep a3, <br />BASE CASE HEATLOSS <br />B.G. wall #1 <br />(Ft2) <br />x U_ <br />_ <br />B.G. slab #1 <br />(L. FI) <br />x F_ <br />x U <br />_ <br />B.G. wall #2 <br />(FI2) <br />B.G. slab #2 <br />(L. Ft) <br />x F_ <br />_ <br />TOTAL COLUMN --► <br />PROPOSED HEATLOSS <br />Use Chapter 10, page 61, U & F-values for this calculation <br />and the same BASE CASE area/L, it, measurements. <br />B.G. wall #1 <br />(F12) <br />x U_ <br />= <br />B.G. slab #1 <br />(L. Ft) <br />x F_ <br />_ <br />B.G. wall #2 <br />(F12) <br />x U_ <br />= <br />B.G. slab #2 <br />(L. Ft) <br />x F_ <br />_ <br />wtnf+ouWMMtX; wain of <br />age 1 <br />TOTAL COLUMN <br />Table 1 (Below grade wall/slabs) <br />Insu/al!adJnrerlorwall Values <br />2' depth: walls <br />U.043 <br />slab <br />F.69 <br />3.5' depth: walls <br />U.041 <br />slab <br />F.64 <br />7' depth: walls <br />U.037 <br />slab <br />F.57 <br />Insulate;i exlarAw_m,,1L' <br />2' depth: walls <br />U.070 <br />slab <br />F.60 <br />3.5' depth: walls <br />U.064 <br />slab <br />F.57 <br />T depth: walls <br />L056 <br />slab <br />F.42 <br />('Depth' indicates the total concrete wall depth <br />including not more than 6' of above grade <br />