1 cubic foot is 12 x 12 144 cubic inches.
How to figure out roof ventilation.
Federal housing authority recommends a minimum of at least 1 square foot of attic ventilation evenly split between intake and exhaust for every 300 square feet of attic floor space.
Use avp s roof vent calculator to determine the number and size of exhaust vents you will need.
Use our easy 3 step attic ventilation calculator to determine your attic square footage and ventilation needs.
Proper attic ventilation consists of a balance between air intake at your eaves soffits or fascias and air exhaust at or near your roof ridge.
Measure the length and width of the attic floor space to be ventilated.
If your roof is 1200 sq ft soffit floor space you will need 4 sq feet of roof ventilation.
Let owens corning roofing help you calculate exactly how much ventilation you will need for a healthy and balanced attic with our 4 step ventilation calculator.
Next multiply the 4 square feet into cubic inches.
Our soffit vents round back vents pop vents and universal vents make excellent intake vents.