The AirHawk B-144 Metal Dome is a 25 inches round roof vent that provides 144 square inches of net free area per piece. Several of these vents are usually required to properly ventilate the attic. They should be placed evenly across the roof.
The AirHawk B-144 Metal Dome is a 25 inches round roof vent that provides 144 square inches of net free area per piece. Several of these vents are usually required to properly ventilate the attic. They should be placed evenly across the roof.
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