Saiyugty 10 Pack 8"""" x 16"""" Automatic Foundation Vent for Ventilating Crawl Space Replacement Auto Air Vent Black

NFA (Sq. In.): 57 NFVA. 8'' x 16'' No electrical hook-up Snap-in installation Color: Black Style: Modern Material: Stainless Steel Aluminum Plastic Mounting Type: Vent Automatic replacement foundation vent For ventilating crawl spaces. Saves energy. Helps prevent foundation decay. Long-life corrosion-free construction. Automatically opens at approx.70°F and closes at approx.40°F . 57 square inches of net free ventilating area. Quality you can trust