Attic Fan Bad Idea

All the problems are dependent on the idea of depressurizing the attic.

Attic fan bad idea.

Strong attic fans can actually back draft furnaces or water heaters by pulling combustion gases out of their burnersand. Good attic ventilation is excellent for. Or attic fan some areas of the country refer to the big fan that circulates air in your house the attic fan as the customer who as. They talk piously about having adequate soffit vents so that s where the air comes from.

Attic fans make your home. Attic fans reduce heat dramatically. Of course if the attic fan isn t working correctly and is running all year long that would be a significant problem. 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.

Much of that heat then conducts downward and finds its way into the house. If the attic fan keeps the house cool enough so that the owners leave the ac off there is almost certainly an energy benefit. The recent hail storm and replacement of everything that is roof related has many of us having to deal with attic fans and wondering. Attic fans reduce moisture in your attic.

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. The temperature in attics without attic fans can climb to as high as 150 degrees. Warm moist air escaping the home through the attic floor can condense on cold surfaces soaking the attic space and rotting the roof deck. Fan problems if there are not enough soffit gable or ridge vents a powerful attic exhaust fan can pull the air from your home.

Ah the whole house fan. Venting a homes attic is a very important best building practices will say 50 at the ridge and 50 at the soffits unobstructed. Do not use mechanical means electric attic fans. As a certified licensed home inspector it is not correct to say too much ventilation is bad for an attic unless rain moisture is getting in.

Ice damming and mold are common problems found in attics with inadequate ventilation. The good and the bad of attic fans. Improperly vented bath and kitchen exhaust fans can pump huge amounts of warm moist air in attic spaces. The negative consequences of moisture make for a long list.

Are attic fans good or bad. These fans are sold with the idea they pull bad air out of the attic and it gets replaced with ambient outdoor air. If the attic fan increases the comfort level of the house it may be worth it.