Broan 355BR Roof Attic Fan
The Roof Attic Fan
355BR by Broan has a brown dome to match the color of your roof. This automatic thermostat helps the temperature in your attic stay below the 200 degree's in the summer. With the Automatic thermostat you can dial to come on between 76 and 120 degrees. This Roof Attic Fan
is a 1200 CFM exhaust fan that mounts directly on your roof. Other options like a gable fan can be added to the ends of the home with out cutting the roof if that is a concern. Roof matching domes means attic fan is less noticeable choose from a black or brown. Too often, attic ventilation is overlooked, not to mention ignored as an opportunity for energy savings. Consider this,air trapped in your attic can easily reach 200 degrees or more.
- Attic Size: Up to 1400 sq. ft.
- Amps: 4.3
- CFM: 1000
- Height: 8"
- Dome Diameter: 23-1/4"
- Dome Material: PVC
How to calculate the CFM needed for your attic application
One square foot of unobstructed inlet area is required for every 300 CFM output.
Multiply your attic square footage by .7 for minimum air delivery need to exhaust the attic. For darker roofs add 15% to the CFM you just calculated. For exceptionally large attics use 2 fans and have sufficient exhaust or it will put the heat back down into the house.