2429 W MUKILTEO BLVD 2016-01-01 MF Import

Instructions Overview The Chapter 5 Approach allows any combination of building envelope components as long as the collective heat loss doesn't exceed a maximum limit established by code. The calculations an the lower part of this page may be ignored if below grade wall insulation will either be R-19 on the interior or R-10 on the exterior or if the basement will not be heated or a habitable space, and the floor above is insulated. Page 2, Target Dwelling Calculation. Compute areas using outer surfaces for walis, ceilings (less skylights), and 800rs. Use the rough-framed opening areas for doors and glazing. WSEC Chapter 10 default values must be used for all walls, ceilings, floors, untested doors/glazing, and to determine below-grade walUslab UA•. The Target glazing area is 15% of the total heated floc- area. ' Page 2, Proposed Dwelltng Calculallon. Compute areas using outer surfaces for wall, ceilings, and floors. Use the rough-framed opening areas for doors and glazing. WSEC Chapter 10 default values must be used for all walls, ceilings, floors, untested doors/glazing, and to determine below-grade walUslab UA'. The Proposed Owelling comp/!es H fhe Proposed UA doesnY exceed the Target UA. Tiansfer wall, celling, floor, g/azing, and door values (R and U) to the Checkllst Below Gnde Calculation (for below-gnde wall/slab heat loss tradeoffa) 1. For each wall that differs in depth, perform a separate calculaHon using Steps 2 8 3. Sum the totals. 2. Detertnine wall area from the slab surface to the top of the mud sill. Exclude door and glazing areas and insert only the concrete wall area into the designated boxes for both Target and Proposed heat loss. 3. Find the appropriate wall depths in Table 1 and insert the corresponding wall values into the Target box(es). MulBply the corresponding wall U-factor by the area derived in Step #1. 4. Measure the perimeter distance in linear feet ior each slab under a wall with a different Table 1 depth. Insert the slab R-factor from Table 1 corresponding to each wall listed in Step #3. GET HEAT LOSS ` able 1(Belaw grade wall/slabs) wall #1 � (Ft2) X U = Depth'Indiwtes the total conaste wall depth ncludiny not moro than 8'of wall obove yrade level.) slab #1 (L.Ft) x F_ _ x u 1= x r �_ TOTAL COLUMN 'If value is not IisM_d, use standaM engineering practice tlE��EfM)aaTulN Insulated interiorwall 2' depth: Walla Slab 3.5' depth: Walls Slab 7' depth: Walls Slab Insulated extertor wall 2' depth: Walls Siab 3.5' depth: Walls Slab 7' depth: Walls Slab Values U.043 F.69 U.041 F.64 U.037 F.57 U.070 F.60 U.064 F.57 U.056 F.42