Calculating Attic Ventalation

There should also be a 50 50 balance of attic venting and roof venting.

Calculating attic ventalation.

Calculate the square footage of the attic space. According to their requirements you should have 1 square foot of attic ventilation per 300 sq ft of attic floor space. 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. Calculate the total vent area needed.

Width or area. Hit the calculate button for the recommended amount of exhaust and intake ventilation. See quantities below for each gaf ventilation product typically rounded up. Select ventilation product flex roll ridge vent multi roll multi purpose vent rigid roll ridge.

If your roof is 1200 sq ft soffit floor space you will need 4 sq feet of roof ventilation. Roof ventilation calculator enter your attic area or length and width to determine your ventilation needs. If local code requires the 1 150 rule please double the requirements. Result of item 1 300.

Length x width of attic in feet 150 total sq. Vent calculatordesign your balanced ventilation system. Use avp s roof vent calculator to determine the number and size of exhaust vents you will need. Calculating attic ventilation requirements.

Our soffit vents round back vents pop vents and universal vents make excellent intake vents. For balanced ventilation an equal amount of intake vent area net free area should also be installed. Enter square footage calculate or enter the square footage of the attic or area to be vented. 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.

Enter the length and width of the attic floor or the total square footage of the attic floor. Determine the amount of ventilation needed for your home with this formula. Calculate the area of your attic and the proper number of vents. 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.

Calculate the square footage of your attic and provide proper attic ventilation with the right number of roof vents ridge vents or soffit vents.