Air Vent AirHawk B144 Plastic Replacement Dome Gray

The Air Vent AirHawk B144 has a round gray plastic dome. It has a 14 inch opening and 144 sq. inches of NFA. Several of these vents are usually required to properly ventilate the attic. They should be placed evenly across the roof.

A guideline to keep in mind with the Air Vent Air Hawk is that homes require 1 square foot of net free area (the total unobstructed area through which air can enter or exhaust a non-powered vent) for every 150 square feet of attic floor space. If balanced between intake and exhaust vents, the requirement is 1 square foot of net free area for every 300 square feet of attic floor space.