Attic Opening Fan

Even though an attic exhaust fan can incrementally lower the temperature of a very hot attic using a fan does not stop the source radiant heat.

Attic opening fan.

Of attic space at up to 1550 cfm. Attic ventilation works on the principle that heated air naturally rises primarily utilizing two types of vents. Use a wood handsaw to enlarge the opening if necessary before putting the fan in. 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. If the attic fan isn t turning on it could be an electrical issue a problem with the thermostat or the motor of the fan that s not working. 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. Your attic fan may not be turning on because of an electrical problem like a tripped circuit breaker a blown fuse or a bad connection.

Place the box fan open side facing away from you into the opening where the attic grille was. A whole house fan is usually installed on the attic floor near the center of your house. During the day any cooler air brought in by the fan will be heated up immediately by the surrounding structure. This is the least expensive high quality fan feature for feature available.

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. 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. In the late evening or early morning the fan is turned on to exhaust hot air from the house. Attic fans serve a different function removing the hot and moist air from the attic and leaving the space below the attic floor alone.

Much of that heat then conducts downward and finds its way into the house. Powered attic ventilators or attic fans just as they sound are designed explicitly for placing or installing in the attics. Step 5 tape strips of plastic tarp using duct tape to the sides top and bottom of the fan to cover the seam between it and the attic wall. These fans circulate the air within the attic pulling fresh.

Most fans cannot keep up. Intake vents located at the lowest part of the roof under the eaves allow cool. 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.