To ensure your roof vents are drawing from your soffits, and not your other roof vents, we recommend that 50 percent of your ventilation should be covered by your soffits, and 50 percent should be covered by your roof vents (50/50).x 144 = 960.48 square inches of NFA needed) Convert square feet of NFA to square inches by multiply square feet of NFA by 144 (6.67 sq.to find out how many vents you will need, then round up to make sure you’re getting enough ventilation. According to the National Building Code, you need 1 sq.For example: Width: 50 ft, Length: 40 ft (50ft x 40 ft = 2000 sq.To do this, measure the length and width of your home.
#WEATHERPRO VENT HOW TO#
So how do you know how to get the perfect number of vents to have a home breathing right? Well, sometimes less is more, which is why we don’t recommend putting 11 roof vents on a single gable-style home… And we don’t recommend mixing your ventilation. Most vent manufacturers recommend a balanced system with half the air coming in through the soffits and half going out through the exhaust. This calculation includes both the intake and exhaust. On low slope applications, double the ventilation is needed: 1 sq. How to calculate ventilation using Duraflo Vents How much ventilation will you need for your space?Īccording to the National Building Code, a minimum of 1 sq.
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