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.
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.
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