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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.

Frame Thickness:
Frame Style:
Blade Thickness:
Blade Angle:
Blade Centres:
Blade Seals:
Standard Bird Screen:
Minimum Height:
Maximum Panel Width:
Maximum Panel Height:
Standard Finish:
Standard Method of Operation:
4" (102 mm)
Extruded 6063-T5 Aluminum
0.081" (2.06 mm)
2420-OP Channel Frame / 2425-OP 1 1/2" Flange Frame
0.081" (2.06 mm)
Adjustable to 45 Degrees
6 1/8" (156 mm)
Vinyl blade edge seals, Santoprene jamb seals
1/2" x 1/2" re-galvanized, 19 gauge
16" (406 mm)
48" (1219 mm)
120" (3048 mm)
Pull Chain Operator
• Factory installed electric actuators (Consult Alumavent for details)
Bird Screen: 1/2 x1/2 Aluminum 0.063, 1/4 x1/4 Aluminum 0.063
Insect Screen: 18 x 14 Mesh
Additional Finishes: Powder Coat Finish, Anodized Finish, Primer, Duranar Finish
• Non insulated blank off panels 
• Insulated blank off panels (1" and 2")
• Extended sills
• Hand crank operation
• Jack shafting for operating multiple sections with one actuator
• Side shaft for remote operation or for actuators by others
• Filter racks