Electric Attic Ventilation Fan Problems

Fan motor runs but the blades don t move sometimes you face an issue where the attic fan s motor comes on but the fan.

Electric attic ventilation fan problems. Turbine fans have angled slits cut into a capped cylinder which create a continuous fan blade. Good insulation reduces fan effectiveness. I had a client whose wife didn t care for the sensation caused by ceiling fans. However a ceiling fan in a room with attic exposure also acts to disrupt the air film reducing it s r value which brings ceiling temperature closer to room ambient.

The result is a cooler attic space with plenty of air exchange. Remove the outer casing of the attic fan and check to see if the belt is sagging cracked worn or broken. Little or no airflow. The wind rotates the fan blade causing air movement in the attic as air is pulled out through the.

On one hand the national renewable energy laboratory said attic ventilation reduces attic temperature 10 to 25 degrees and slows the transfer of heat into the living space. Insufficient ventilation can lead to moisture problems during the winter and decreased energy efficiency during the summer but too much ventilation can be just as bad if not worse. If the motor is working but the fan blades are not moving the problem may be the belt. However the utility of attic ventilation fans is actually quite a controversial topic.

Sealed attics trap excessive heat and moisture which can lead to reduced shingle life. Attic fans perform this ventilation by pushing hot air out into the environment while also pulling fresh cool air into the attic. The science behind attic ventilation however is sound. Common attic fan problems and how to fix them.

We think of ceiling fans in terms of evaporative cooling of the skin. During the day any cooler air brought in by the fan will be heated up immediately by the surrounding structure. Most fans cannot keep up. Roof vents create an additional roof penetration essentially another place of vulnerability where leaks can occur.

Attic fan not turning on if the attic fan isn t turning on it could be an electrical issue a problem with the. If there is any damage to the belt replace it with a new one.