Net Free Ventilating Area : 90 Sq-ft Rough Opening Size : 18 In L X 12 In W Material : Aluminum Finish : Mill Color : Silver Length : 20-1/2 In Width : 14-1/2 In Height : 2 In
Net Free Ventilating Area : 480 Sq-in Air Flow Rate : 1000 Cfm Material : Steel Installation Type : Roof Dimensions : 25 In L X 25 In W Suitable For : Attics Spaces Up To 1600 Sq-ft
Net Free Ventilating Area : 117 Sq-in Rough Opening Size : 5 In Material : Polypropylene Color : Brown Overall Length : 10.94 In Overall Width : 12.98 In Overall Height : 6-1/2 In
Net Free Ventilating Area : 112 Sq-in Rough Opening Size : 18-1/2 In L X 12.813 In W Material : Polypropylene Color : White Length : 20-1/2 In Width : 14.813 In Suitable For : Molded-In Screen
Net Free Ventilating Area : 74 Sq-in Rough Opening Size : 22 In L X 16-1/2 In W Material : Polypropylene Color : White Length : 27-1/2 In Width : 21-1/2 In Suitable For : Molded-In Screen
Net Free Ventilating Area : 58 Sq-in Rough Opening Size : 17 In L X 17 In W Material : Polypropylene Color : White Length : 19.232 In Width : 19.232 In Suitable For : Molded-In Screen
Net Free Ventilating Area : 60 Sq-in Material : Aluminum Color : Weathered Wood Installation Type : Roof Length : 18 In Width : 20-1/2 In Height : 5-1/2 In
Net Free Ventilating Area : 600 Sq-in Air Flow Rate : 1250 Cfm Material : Steel Color : Black Installation Type : Roof Dimensions : 25 In L X 25 In W Suitable For : Attic Spaces Up To 2200 Sq-ft
Net Free Ventilating Area : 60 Sq-in Rough Opening Size : 10 In L X 10 In W Material : Aluminum Color : Black Installation Type : Roof Length : 20-1/2 In Width : 16 In Height : 5-1/2 In
Net Free Ventilating Area : 44 Sq-in Rough Opening Size : 18-1/4 In L X 12-1/2 In W Material : Polypropylene Color : White Length : 18 In Width : 12 In Suitable For : Molded-In Screen