Attic Fans Do They Help

If you want your home air conditioner to cool you.

Attic fans do they help.

Attic fans exhaust hot air from your attic to the outside. Mechanical fans this is where an attic fan can help. 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. Unlike a ventilation fan a whole house fan an attic mounted fan that exhausts air from a home at night is designed to cool a house that is to lower the indoor temperature.

How an attic fan works. Attic fans are critical because they are designed to cool off the attic providing relief to the unbearable temperatures of your home. This allows it to improve your hvac efficiency and protect your roof shingles plus the structural integrity of your attic. The most significant benefit of solar attic fans is that they operate using renewable energy from the sun instead of being hooked up to your electrical grid.

Fresh air is pulled in from your soffits and or roof vent creating a draft through your attic. Intake vents located at the lowest part of the roof under. Note that they do not push air in the house but draw fresh air into the attic enabling your house to cool almost instantly. Attic fans perform best when your attic is properly sealed and insulated to block the entry of heat and moist air.

The problem with this design as argued by energy professionals is that attic fans also pull the conditioned air from your home into the attic. Ideally this will lower the high temperatures that have built up in your attic. It is designed to lower the temperature of an attic by exhausting air from the attic and replacing attic air with outdoor air. Using a fan to blow hot air out of the attic doesn t address the radiant heat flow from the roof to the attic floor.

A powered attic ventilator has a different purpose. Much of that heat then conducts downward and finds its way into the house. Cool air in hot air out attic ventilation works on the principle that heated air naturally rises primarily utilizing two types of vents. The attic fans just pull air through a hot attic space in an effort to reduce the infrared heat gain you feel through the ceiling of your home.

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. Trying to solve the heat gain problem in your attic by using a fan is like lying out at the beach with a fan blowing over you and thinking you re not going to get a sunburn. So much more than just ventilation.