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Net Free Area

The total unobstructed area through which air can enter or exhaust a non-powered vent; generally measured in square inches. All nonpowered vents have a Net Free Area rating.

Air Vent Contractor LocatorOur exclusive Contractor Locator will allow you to find contractors in your area who can assist with Air Vent product installation—including solar attic fans and skylight tubes. Click the link below to register and get started.

 

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