Do Attic Fans Really Help

The most significant benefit of solar attic fans is that they operate using renewable energy from the sun instead of being hooked up to your electrical grid.

Do attic fans really help.

Some may also argue that an attic fan helps in the ventilation of your roof and or attic. Attic fans are intended to cool hot attics by drawing in cooler outside air from attic vents soffit and gable and pushing hot air to the outside. This allows it to improve your hvac efficiency and protect your roof shingles plus the structural integrity of your attic. Your home s roof and attic was most likely designed with just the right amount of fresh air it needs.

When you compare the capital expense of this product to the ongoing bills you would pay to operate the unit you ll come out ahead every time. However if your attic has blocked soffit vents and is not well sealed from the rest of the house attic fans will suck cool conditioned air up out of the house and into the attic. The humid air might cause condensation which might promote molds growth in the attic which is a health hazard. But the outdoor air is the source of the moisture so that proposed solution is clearly counterproductive.

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. Soffits gable vents without fans and rafter vents are passive ventilation systems to keep your roof and attic healthy. That is i said that when you run a power attic ventilator in a typical house yes it will cool the attic down. One reason power attic ventilators don t help in my original article i focused on makeup air.

Ventilation fans or powered attic ventilators are designed to cool the attic pushing out the hot attic air and rushing in a flow of cool outside air. 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. Powered attic ventilators are housed in the. Attic fans perform best when your attic is properly sealed and insulated to block the entry of heat and moist air.

A significant amount of that cooling is likely to come from conditioned air being sucked up from the house below. This will ensure that the attic is protected. So much more than just ventilation. When there is much humid in the air the attic fan can help eliminate the moist air.