1050 Cfm Roof-Mounted - Model 350 Trapped attic air can easily reach 150° or more. These units remove super-heated attic air, making any home more comfortable. Whether it’s air conditioned or not. In those homes that are, the air conditioners run less and don’t have to work nearly as hard. And all Broan Powered Attic fans are as efficient as they are dependable. 14" diameter steel blade specially designed for maximum air movement. Operates automatically – adjustable thermostat built-in. Thermally protected, permanently lubricated motor. Durable Off-White, Fade-Resistant Pvc Dome Can Be Painted To Match Roof Color Mounts Easily Between Rafters – Template Included For Cutting Roof Boards And Shingles Mesh Screen Keeps Out Birds And Insects 3 7/8" High Splash Guard Helps Keep Out Rain Heavy Gauge Metal Flashing Stands Up To Nailing And Tarring, Regardless Of Climate Thermostat And Motor Accessible From Outside For Easy Servicing, If Required Hvi Certified Air Delivery 0.03" Static Pressure 1050 Cfm For Attics Up To 1500 Sq. Ft