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Adjustable extruded aluminum louver with drainable blades. Functions as a standard louver when open and provides tight air and weather shutoff when closed; typically factory-mounted electric actuators.

• 6-inch depth
• 55% free area (4 ft. x 4 ft.)
• 1,107 fpm free area velocity at the beginning point of water penetration
• Highest intake volume capacity in its class

Extruded aluminum combination louver-damper with drainable louver blades, airfoil damper blades, and concealed jamb linkage. Provides standard louver performance when open and tight air/weather shutoff when closed.

• 6-inch depth
• 48% free area (4 ft. x 4 ft.)
• 1,221 fpm free area velocity at the beginning point of water penetration
• Highest intake volume capacity in its class

Extruded aluminum combination louver-damper with drainable blades and concealed jamb linkage. Functions as a standard louver when open and provides tight air and weather shutoff when closed.

• 4-inch depth
• 40% free area (4 ft. x 4 ft.)
• 1,192 fpm free area velocity at the beginning point of water penetration

Extruded aluminum combination louver-damper with drainable blades and concealed jamb linkage. Operates as a standard louver when open and provides tight air and weather shutoff when closed.

• 6-inch depth
• 46% free area (4 ft. x 4 ft.)
• 1,024 fpm free area velocity at the beginning point of water penetration

Extruded aluminum combination louver-damper with drainable blades and rear linkage for larger panel sizes. Operates as a standard louver when open and provides tight air/weather shutoff when closed; typically factory-mounted electric actuators.

• 6-inch depth
• 46% free area (4 ft. x 4 ft.)
• 1,035 fpm free area velocity at the beginning point of water penetration

Extruded aluminum combination louver-damper with drainable blades and rear linkage for larger panel sizes. Functions as a standard louver when open and provides tight air/weather shutoff when closed; typically factory-mounted electric actuators.

• 4-inch depth
• 48% free area (4 ft. x 4 ft.)
• 1,018 fpm free area velocity at the beginning point of water penetration

Adjustable extruded aluminum louver with drainable head and J-style blades that open 90° for maximum free area. Ideal for high-volume exhaust; provides tight air and weather shutoff when closed.

• 6-inch depth
• 40% free area (4 ft. x 4 ft.) 45º open
• 68% free area (4 ft. x 4 ft.) 90º open
• 1,069 fpm free area velocity at the beginning point of water penetration (blades in 45° open position)

Adjustable extruded aluminum louver with drainable blades. Operates as a standard louver when open and provides tight air and weather shutoff when closed; typically factory-mounted electric actuators.

• 4-inch depth
• 36% free area (4 ft. x 4 ft.)
• Above 1250 fpm free area velocity at the beginning point of water penetration

Adjustable extruded aluminum louver with drainable blades. Functions as a standard louver when open and provides tight air and weather shutoff when closed; typically factory-mounted electric actuators.

• 6-inch depth
• 57% free area (4 ft. x 4 ft.)
• 885 fpm free area velocity at the beginning point of water penetration

Extruded aluminum combination louver-damper with drainable blades and concealed jamb linkage. Operates as a standard louver when open and provides tight air/weather shutoff when closed; includes concealed electric actuator.

• 6-inch depth
• 39% free area (4 ft. x 4 ft.)
• 1,024 fpm free area velocity at the beginning point of water penetration