Do Attics Need Fans

Powered attic ventilators or attic fans just as they sound are designed explicitly for placing or installing in the attics.

Do attics need fans. Adding roof ridge vents can reduce summer air conditioning costs prevent roof mildew and rot and keep your roof in better shape longer. Ok i would definitely not recommend an attic fan. Because of this they require significant ventilation in the attic. On the other the florida solar energy center university of central florida found that attics with nominal natural ventilation and r 19 ceiling insulation do not need powered vent fans as it turns out because the insulation slows heat from moving down into the living space homes with well insulated attics don t see a significant reduction in their cooling load when they add attic ventilation fans.

Whole house fans take all the hot air from the house and move it up into the attic and out through the attic vents. Purchasing an electric or solar attic fan may not provide the savings that homeowners expect. That paper notes data measured at fsec and elsewhere show that attics with nominal natural ventilation and at least r 19 ceiling insulation do not need powered vent fans. Because what happens is attic fans are so strong that they actually reach down into the conditioned space of your house and they do that by using the wall cavities and where the outlets and pipes come through the walls as places where they draw air from the inside of your house it s that air conditioned air and it ll pull it right up into the attic and exhaust it outside.

Installing roof ridge vents and more attic insulation are better options experts say. Video of the day. The two main types of attic fans whole house fans are primarily designed to provide fresh air for the occupants of a house. Whole house fans need windows and doors open and attic fans need lots of soffit vents to suck.

Whole house fans also serve the purpose of lowering the temperature in a home. By constantly moving the air around the fan keeps the air in your home from going stale and smelling musty.