Broan 433 Automatic Gable Shutter

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 Upgrade your ventilator with Broan-NuTone's Automatic Shutters! These shutters are designed for Broan-NuTone-NuTone models 353 and 35316. They allow more air movement than conventional stationary attic louvers to ensure the superior airflow. The counter-balanced aluminum vanes open automatically when the ventilator is turned on and close when the fan stops for your convenience. The flange fits flush against the outside wall for a neat, smooth appearance. This shutter is reinforced for strength and provides tight weather closure for reliable, lasting use. The Broan-NuTone's Automatic Shutters measures 16.75" x 2.75" x 16.75", perfect for your home.