2420-OP & 2425-OP 4 Inch Stormproof Operable Louvers

The Alumavent 2420-OP is a four inch (100 mm) deep operable stormproof louver. The 2420-OP is ideal for an application in which the available space does not allow for a stationary louver and backdraft damper. It’s design provides protection from water penetration while retaining a high free area with minimal static pressure drop.