The Broan model 433 automatic shutter is the perfect accessory to Broan gable mount powered attic ventilators, provided you have adequate air intake on the opposite side of the attic or the in the eaves. Attic ventilation is critical to making any home more comfortable while helping to lower energy costs. Stagnant air can be removed, drawing fresh air across the surfaces. The home ventilating institute recommends at least one square foot of open air inlets for each 300 CFM of ventilator capacity.

Features

Item Weight	3.59
Features	Automatic Shutter,UV Resistant,Weather Resistant
Material	Aluminum
Intake/Exhaust	Exhaust
Screen Included	No
Mounting Position	Gable Mount
Shape	Square
Returnable	180-Day
Color/Finish	Aluminum
Product Weight (lb.)	3.59
Paintable/Stainable	No
Color Family	Silver
Power Type	Non-Powered
UV Resistant	Yes
Cut-Out Width (in.)	16.25 in
Net-Free Area (Sq. In.)	216.0
Product Depth (in.)	2.75
Product Width (in.)	16.75
Product Height (in.)	16.75
Manufacturer Warranty	None