WAC 51-11R-40215. Target/Proposed UA equations

EQUATION 1 - GROUP R OCCUPANCY TARGET UA UA T = U W A W + U BGW A BGW + U VG A VG + U OG A OG + U F A F + U RC A RC + U D A D + F S P S + F BGS P BGS UA T = U W A W + U BGW A BGW + U VG A VG + U OG A OG + U F A F + U RC A RC + U D A D + F S P S + F BGS P BGS Where: UA T = The target combined thermal transmittance of the gross exterior wall, floor and roof/ceiling area. U W = The thermal transmittance value of the opaque above grade wall found in Table R402.1.2. A W = Opaque above grade wall area. U BGW = The thermal transmittance value of the below grade opaque wall found in Table R402.1.2. A BGW = Opaque below grade wall area. U VG = The thermal transmittance value of the fenestration found in Table R402.1.2. A VG = (a) The proposed glazing area; where proposed fenestration glazing area is less than 15 percent of the conditioned floor area, minus A OG . (b) 15 percent of the conditioned floor area; where the proposed fenestration glazing area is 15 percent or more of the conditioned floor area, minus A OG . U OG = The thermal transmittance value of the skylight glazing found in Table R402.1.2. A OG = Skylight glazing area (if the proposed A OG exceeds 15 percent, the target A OG shall be 15 percent of the total floor area of the conditioned space). U F = The thermal transmittance value of the floor found in Table R402.1.2. A F = Floor area over unconditioned space. U RC = The thermal transmittance value of the ceiling found in Table R402.1.2. A RC = Roof/ceiling area. U D = The thermal transmittance value of the fenestration found in Table R402.1.2. A D = Opaque door area. F S = Concrete slab on grade component F -factor found in Table R402.1.2. P S = Lineal ft. of concrete slab on grade perimeter. F BGS = Concrete below grade slab component F -factor found in Table R402.1.2. P BGS = Lineal ft. of concrete below grade slab perimeter. Where: UA T = The target combined thermal transmittance of the gross exterior wall, floor and roof/ceiling area. U W = The thermal transmittance value of the opaque above grade wall found in Table R402.1.2. A W = Opaque above grade wall area. U BGW = The thermal transmittance value of the below grade opaque wall found in Table R402.1.2. A BGW = Opaque below grade wall area. U VG = The thermal transmittance value of the fenestration found in Table R402.1.2. A VG = (a) The proposed glazing area; where proposed fenestration glazing area is less than 15 percent of the conditioned floor area, minus A OG . (b) 15 percent of the conditioned floor area; where the proposed fenestration glazing area is 15 percent or more of the conditioned floor area, minus A OG . U OG = The thermal transmittance value of the skylight glazing found in Table R402.1.2. A OG = Skylight glazing area (if the proposed A OG exceeds 15 percent, the target A OG shall be 15 percent of the total floor area of the conditioned space). U F = The thermal transmittance value of the floor found in Table R402.1.2. A F = Floor area over unconditioned space. U RC = The thermal transmittance value of the ceiling found in Table R402.1.2. A RC = Roof/ceiling area. U D = The thermal transmittance value of the fenestration found in Table R402.1.2. A D = Opaque door area. F S = Concrete slab on grade component F -factor found in Table R402.1.2. P S = Lineal ft. of concrete slab on grade perimeter. F BGS = Concrete below grade slab component F -factor found in Table R402.1.2. P BGS = Lineal ft. of concrete below grade slab perimeter. EQUATION 2 - GROUP R OCCUPANCY PROPOSED UA UA = U W A W + U BGW A BGW + U VG A VG + U OG A OG + U F A F + U RC A RC + U D A D + F S P S + F BGS P BGS UA = U W A W + U BGW A BGW + U VG A VG + U OG A OG + U F A F + U RC A RC + U D A D + F S P S + F BGS P BGS Where: UA = The combined thermal transmittance of the gross exterior wall, floor and roof/ceiling assembly area. U W = The thermal transmittance of the opaque above grade wall area. A W = Opaque above grade wall area. U BGW = The thermal transmittance value of the below grade opaque wall. A BGW = Opaque below grade wall area. U VG = The thermal transmittance value of the fenestration glazing. A VG = Fenestration glazing area, including windows in exterior doors. U OG = The thermal transmittance value of the skylight glazing. A OG = Skylight glazing area. U F = The thermal transmittance of the floor. A F = Floor area over unconditioned space. U RC = The thermal transmittance of the ceiling. A RC = Ceiling area. U D = The thermal transmittance value of the opaque door area. A D = Opaque door area. F S = Concrete slab on grade component F -factor. P S = Lineal ft. of concrete slab on grade perimeter. F BGS = Concrete below grade slab component F -factor. P BGS = Lineal ft. of concrete below grade slab perimeter. Where: UA = The combined thermal transmittance of the gross exterior wall, floor and roof/ceiling assembly area. U W = The thermal transmittance of the opaque above grade wall area. A W = Opaque above grade wall area. U BGW = The thermal transmittance value of the below grade opaque wall. A BGW = Opaque below grade wall area. U VG = The thermal transmittance value of the fenestration glazing. A VG = Fenestration glazing area, including windows in exterior doors. U OG = The thermal transmittance value of the skylight glazing. A OG = Skylight glazing area. U F = The thermal transmittance of the floor. A F = Floor area over unconditioned space. U RC = The thermal transmittance of the ceiling. A RC = Ceiling area. U D = The thermal transmittance value of the opaque door area. A D = Opaque door area. F S = Concrete slab on grade component F -factor. P S = Lineal ft. of concrete slab on grade perimeter. F BGS = Concrete below grade slab component F -factor. P BGS = Lineal ft. of concrete below grade slab perimeter. NOTE: Where more than one type of wall, window, roof/ceiling, door and skylight is used, the U and A terms for those items shall be expanded into subelements as: U W1 A W1 + U W2 A W2 + U W3 A W3 + ...etc. NOTE: Below grade walls: The wall is assumed to extend from the slab upward to the top of the mud sill for the distance specified in Table A104.1, with 6 inches of concrete wall extending above grade. This will be calculated separately from above grade walls using the wall height that best describes the system.