• Features
Allows more air movement than conventional stationary attic louvers
Counter balanced aluminum vanes open automatically when ventilator is turned on, close when fan stops
Flange fits flush against outside wall for neat, smooth appearance
Reinforced for strength, provides weather tight closure
Use with models 353 and 35316 - sold separately
The frame material is fabricated from 0.08 to 6063-T6 extruded aluminum
The louvers are fabricated from 0.016 to 3105-H28 aluminum coil