Do Attic Fans Push Air In Or Out

If you replace the extreme hot air inside an attic that might be 140 160f with air that is 85 95f the inside of your home should also be cooler.

Do attic fans push air in or out.

Place one or two fans on the lower level in the window facing in so that fresh air is simultaneously drawn into the house. Place one or two fans in upstairs windows with the fans facing out. Insulated attic fan door newer attic fans have insulated doors that close in 30 seconds when the fan s not operating. Most homes already have some passive attic venting built in.

It allows hot air to escape in the summer and can also help reduce the chances of ice damage in the winter by allowing a natural flow of outdoor air to ventilate the attic. How does an attic fan work. It draws cooler outside air in through open doors and windows to create a pleasant breeze that pushes hot air out through attic vents. That same week in the same area i saw an attic fan someone had just purchased right next to a dehumidifier also new in the box.

The attic fan was pulling air from the house into the ducts then out of the ducts in to the attic through leaks in the ducts. If you set one to push air in you ll be pushing all kinds of dust dirt and insects into the. They only move air through an attic space above where you are. This prevents hot air from seeping into your home and driving up the temperature in the living space which reduces the load on your air conditioner.

Whole house fans may seem old fashioned but they re enjoying renewed popularity. The cooling principle here is simple. While a simple vent is sometimes used to allow for the passive flow of air it s also possible to add a powered attic fan commonly called an attic power ventilator. When you install a fan to pressurize the attic the attic will become pressurized with respect to the outdoors and with respect to the conditioned house below.

The pressurized air in the attic will force its way through ceiling cracks into the conditioned house. Cool air enters the attic through soffit vents in the eaves. On the theme of creating positive pressure in the attic and displacing hot attic air with cooler exterior air ventilation fans designed for foundation ventilation could possibly used in place of 22 5 inch eave vents to push in exterior air and thereby push out attic air through high gable vents and eyebrow vents. Attic ventilation fans help cool air your attic by pushing out the stifling hot air from inside the attic and bringing in cool air from outside.

The air source will come from the eaves of the roof.