How Often Should Attic Fan Last

Attic fans exhaust hot air from your attic to the outside.

How often should attic fan last.

A fan may be installed in an attic for the different purpose of cooling a whole house venting hot air out via the attic. However the utility of attic ventilation fans is actually quite a controversial topic. Such fans are often called whole house fans. An attic fan doesn t require annual maintenance.

Standard insulation starts to degrade and start peeling from walls after about 15 years. Attic fans are designed and installed to switch on via a thermometer when the temperature in a house reaches a certain point. The downside of attic ventilation fans. Attic temperatures and roof lifetimes standard asphalt shingle roofs is northern vermont where martin holladay lives last 30 or more years while roofs in south texas last about 15 to 18 years.

You ll know it needs to be replaced if there are insulation leaks or if it is peeling from the walls. Most fans cannot keep up. During the day any cooler air brought in by the fan will be heated up immediately by the surrounding structure. Attic fans are typically used in warmer months when temperatures in an attic can exceed 120 f 49 c.

With an attic fan that switches on appropriately when the attic reaches a specific degree somewhere between 105 120 degrees fahrenheit it. Good insulation reduces fan effectiveness. Insulation should also be replaced in some cases sooner than 15 years if it is no longer doing its job properly. Static vents often protrude from roofline thanks to special covers intended to keep all precipitation rain sleet hail and snow from entering the attic.

Attic ventilation fans whether hard wired or powered by their own solar panels seem like a low cost and effective way to help keep your house cool. I think that the difference is due to the hotter attic temperatures in the south which increase the shingle temperatures. Mechanical attic ventilation fans may be powered in a variety of. An attic fan is installed on the slanted side of your roof or on one of the gable sides of your attic.

Because of the attic s location it is always a hotter part of the house. 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. If you have an older home chances are the attic insulation is the same insulation that was installed when the house was built.