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F •n7it No. ___ <br />Heat source: ELECTRIC (except heat pumps), Zone 1 <br />.�< <br />Instructions Effective July 1, 1991 <br />Overview 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 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 R10 exterior, or if 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 Calculation Compute areas using outer surfaces for walls, ceilings, and floors. Use the <br />rough framed opening areas for doors and glazing. Since there are only four boxes on the form for glazing, combine <br />the areas of units with file same Uo value into a single entry. V:t;EC, 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 It the the Proposed UA doesn't exceed the Base Case UA. <br />Transfer wall, coiling, floor, glazing, and door values (R and U) to the Check list. <br />Method A (below -grade wall/slab heat -loss trade(ffs) <br />1. For each wall that differs in depth, perform a seperate calculation using Steps 2 & 3. Sum (tie totals. <br />2. Deterpline Wall area frcmthe sia%sVda?e to thegop of the mud III. ExcTi e door and glazing areas and Insert <br />Ft�hern intoopthpe designated boxes <br />s (fie (w or aoth ase case an 6 ropose eatWss, <br />3. Multiply t11e odr�eapond ng waall U•Valueeby thnda�eaddehlvedmbp p gllg wall values into the Daso case box(os). <br />4. Mea9Uro he ponppt ndistance In linear feet for each slab under a Of with a different Table 1 depth, insert the <br />slab F-va�ue Irom 1 able 1 corresponding to each wall listed in Step ri3. <br />BASE CASE HEATLOSS <br />B.G. wall #1 <br />(Ft2) <br />x U _ <br />_ <br />D.G. slab #1 <br />(L. Ft) <br />x F_ <br />_ <br />B.G. wall #2 <br />(Ft2) <br />x U_ <br />_ <br />B.G. slab #2 <br />(L. Ft) <br />x F_ <br />_ <br />TOTAL COLUMN -i N <br />Noma <br />PROPOSED HEATLOSS <br />Use Chapter 10, page 61, U & F-values for this calculation <br />and the same BASE CASE area/L. ft. measurements. <br />B.G. wall #1 <br />(Ft2) <br />x U <br />_ <br />B.G. slab #1 <br />(L. Ft) <br />x F_ <br />_ <br />B.G. wall #2 <br />(Ft2) <br />x U_ <br />_ <br />B.G. slab tf2 <br />(L. Ft) <br />x F_ <br />_ <br />vk6:u u»n ,�xa,mur ai <br />Page 1 <br />TOTAL COLUMN <br />N Ili <br />Table 1 (Below grade wall/slabs) <br />InsulatedInteclvc.wall 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 />Insulateff.Warlomall <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 />7' depth: walls <br />U.056 <br />slab <br />F.42 <br />('Depth' indicates the total concrete wall depth <br />including not more than e' of above grade <br />