Patent ID: 7556560

Claim:
An air vent cover for attachment to a crawlspace wall, over an air vent opening, to enclose said air vent opening and seal the air vent opening against the entry of air and humidity from the atmosphere into the crawlspace, said air vent cover comprising: a rectangular panel of unitary construction molded from durable plastic composition with an integral flat outer surface surrounded by an integral recessed peripheral border, the recessed peripheral border being recessed relative to the flat outer surface and being provided with a plurality of holes for receiving attachment means for fastening the cover to a crawlspace wall; and an integral recessed inner surface surrounded by an integral projecting peripheral border, said recessed inner surface being recessed relative to the projecting peripheral border and being provided with integral projecting reinforcing ribs which extend across the width of the recessed inner surface and project from the integral recessed inner surface inwards towards the integral projecting peripheral border to reinforce the panels against warpage when they are fastened to the crawlspace wall.