Broan 433 - Automatic Gable Shutter

• Gable Shutter
• Automatic shutter
• For N353 Gable Mount Attic Ventilator
• Counter-balanced aluminum vanes
• Vanes open automatically when turned on
• Vanes close when turned off
• 16-1/4" square flange
• Flange fits flush against outside wall
• 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.