Bestvents 315CBL Foundation Vent, 62 sq-in Net Free Ventilating Area, Thermoplastic

With 1W frame for new construction or to replace old foundation vents. Fits standard 8 x 16 concrete block opening. Operates automatically without electricity; opens at 70 degrees Fahrenheit, closes at 40 (approximately). Simple homeowner/DIYer snap-in installation, with color matched set screws for additional stability. Removable back for maintenance and cleaning. Screened with 1/8 heavy-duty aluminum mesh. High-density thermo-plastic construction. All metal parts are corrosion resistant stainless steel. Aluminum louvers. No mortar required for installation. 62 square inch net free area. 8 x 16.With 1 in W frame for new construction or to replace old foundation vents. Fits standard 8 in x 16 in concrete block opening. Operates automatically without electricity, opens at 70 deg F, closes at 40 (approximately). Simple homeowner/DIYer snap-in insta