Do Attics Need Fans. 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. Much of that heat then conducts downward and finds its way into the house. That s an opening right.
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. Open your windows before you turn on the fan.
The main work of an attic fan is to regulate the heat level of the attic by removing hot air out of the attic and pushing it outside providing needed ventilation.
That said air resistance and interference such as vent grates reduces the area of true ventilation. 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. Electric attic fans however often increase energy consumption and cancel out any savings unless the attic is not insulated at all. That s an opening right.
