CMI 18.25-in x 24.25-in Silver Rectangle Steel Gable Louver Vent

Gable louvers help provide attic ventilation to exhaust unwanted heat and moisture which can damage wood or roofing materials. A balanced ventilation system (50% intake ventilation combined with 50% exhaust ventilation) can also lower utility bills. Conforms to Federal Specification QQ-5775A, Type 1, Class 4 ASTM A-653- meets FHA codes. 28-Gauge galvanized steel, 1-piece construction with a 2 in. thick frame. 1/4 in. Galvanized wire mesh prevents entry from birds or large insects.