24 in. 2,878 CFM-3,543 CFM Roof Mount Whole House Fan with 1 Damper Grille

The Roof Mount Whole House Fan Series is our newest and most exciting line of whole house fans. With multiple applications . you can now experience all the benefits of our revolutionary whole house fan with little to no attic space. A whole house fan is a ventilation cooling system that uses less energy than a traditional air conditioner. This energy-efficient system works by pulling cool . outdoor air into your home and out your attic vents. This helps keep the mass in your home cooler than an air conditioner can. These whisper-quiet and energy-efficient wonders are the #1 residential cooling & ventilation appliance on the market. With a whole house fan . you're able to turn off your most expensive appliance . air conditioning . while improving the air quality and comfort of your home for just pennies per hour.