How Many Roof Vents Gor 2k Sq Ft House

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.

How many roof vents gor 2k sq ft house. 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. Choose one of the following products to meet the recommended exhaust nfva of 528 square inches. 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. And this guideline you ll need a minimum of.

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. You mention exhaust vents shouldn t exceed intake vents in the roof for proper circulation. 27 lineal feet required. Thus if your attic is 450 square feet you need roof vents equaling 3 square feet.

I need additional exhaust ventilation in my roof with the planned installation of a whole house fan in the attic of my home located in sf bay area. However with only two 1 ft x 2 ft gable roof vents i ll need an additional 7 sq ft of exhaust vents. Based on your 1100 sq. For example a 6 by 12 inch soffit vent has 72 square inches which when divided by 144 results in a 0 5 square foot opening.

They should be divided equally between inlet and outlet vents and they can be used in any combination that will work with your roof s design.