16.75 in. x 16.75 in. Square Aluminum Aluminum Automatic Shutter Gable Louver Vent Value:each 200 RPM with up to

200 RPM with up to a 16 cutting swath and gives you the power to maintain speed in demanding applications without bogging down

DCB230C same runtime and power in a lighter

0 to 950 rpm

Includes: 1 M18 FUEL 8 in

16.75 in. x 16.75 in. Square Aluminum Aluminum Automatic Shutter Gable Louver Vent Value:each 200 RPM with up toThe 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