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38x55= 2090 + 22x20= 440 = 2530/150 (without a v.b.) = 17 NFVA
½ of 17= 8.5NFVA in soffits + ½ of 17= 8.5 in pot vents (turtle-backs)exhaust
8.5 x 144= 1224 sq.in. NFVA / continuous soffit @ 9NFVA = 136 lineal feet http://www.airvent.com/homeowner/products/intakeSoffit-specs.shtml
Grumpy was right-on, hope he got some rest......
38 + 55 +38 + 35 = 166 because garage drywall goes up last garage common truss. Drywall the hole in the fire-wall at garage/house attic or a fire-door.
Use pot vents to total 166NFVA, same as soffits. Continuous at the garage soffits, both sides.
Gary
½ of 17= 8.5NFVA in soffits + ½ of 17= 8.5 in pot vents (turtle-backs)exhaust
8.5 x 144= 1224 sq.in. NFVA / continuous soffit @ 9NFVA = 136 lineal feet http://www.airvent.com/homeowner/products/intakeSoffit-specs.shtml
Grumpy was right-on, hope he got some rest......
38 + 55 +38 + 35 = 166 because garage drywall goes up last garage common truss. Drywall the hole in the fire-wall at garage/house attic or a fire-door.
Use pot vents to total 166NFVA, same as soffits. Continuous at the garage soffits, both sides.
Gary
