Air Vent's popular attic ventilation calculator now available as a free download
Air Vent’s Intake Vent: The Edge™ Vent provides proper intake ventilation for homes with little or no overhang. It’s a roof-top installed, shingle-over intake vent designed based on roofing contractor feedback from our Ask the Expert™ seminars. It can be used to supplement existing soffit or undereave vents as well. The vent provides 9 square inches of net free area per linear foot.