How Much Attic Vent For 1100 Square Feet

Example 20 wide by 50 long attic.

How much attic vent for 1100 square feet.

The rule of thumb on the amount of vent space needed is approximately 1 sq. Get fair costs for your specific project requirements. Of vent space for every 150 sq. 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.

Based on your 1100 sq. See typical tasks and time to insulate an attic along with per unit costs and material requirements. Based upon just about everyone s recommendations 60 percent or 3 square feet of this should be in the soffit area and the remaining 40 percent 2 square feet should be located at the ridge of the roof. Ft you divide that by 150 to get 10 sq.

Attic area in square feet. The cost to insulate an attic starts at 1 68 3 25 per square foot but can vary significantly with site conditions and options. And this guideline you ll need a minimum of. 2200 square foot home x 8 inch ceiling height 17600 cubic feet.

As an example let s use a home that measures 2200 square feet has an average floor to ceiling height measurement of 8 feet and a whole house fan with cfm rating of 1600. 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. 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. Next multiply the square feet of attic space by 0 7 to get the minimum number of cubic feet of air per minute that the fan should be rated to move.

See professionally prepared estimates for attic insulation work. So if your attic is 1 500 sq. Near ridge of the roof. Attic x 0 7 700 cfm minimum fan rating.

We know we need 5 square feet total of ventilation area. Net free area in square inches. Determine the home s cubic measurement by multiplying the square footage by ceiling height. Ventilation area in square feet.