How Much Attic Vent For 1100 Square Feet

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.

How much attic vent for 1100 square feet.

Example 20 wide by 50 long attic. So if your attic is 1 500 sq. Attic x 0 7 700 cfm minimum fan rating. We know we need 5 square feet total of ventilation area.

Get fair costs for your specific project requirements. Based on your 1100 sq. 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. 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.

Attic area in square feet. And this guideline you ll need a minimum of. Determine the home s cubic measurement by multiplying the square footage by ceiling height. 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.

See professionally prepared estimates for attic insulation work. Near ridge of the roof. The cost to insulate an attic starts at 1 68 3 25 per square foot but can vary significantly with site conditions and options. 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.

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. Ft you divide that by 150 to get 10 sq. Ventilation area in square feet. The rule of thumb on the amount of vent space needed is approximately 1 sq.

Of vent space for every 150 sq. See typical tasks and time to insulate an attic along with per unit costs and material requirements. Net free area in square inches. 20 x 50 1 000 sq.