Broan 355BR Attic Ventilator, 1200 CFM Roof Mount - Brown

It is constructed to operate at a flow rate of 1200 CFM. By removing the blanket of trapped, hot air from attics, this ventilator can supplement or replace air conditioning. Your attic can be drier and cooler with the Broan 355BR. Even on a 90-degree day, the ventilator will keep the air temperature in the attic cooler. Attic ventilation is an important factor when it comes to making your home more comfortable.