Do I Need A Solar Attic Fan

This fan moves 1 000 or more cubic feet of air per minute creating low pressure in your attic.

Do i need a solar attic fan. You will probably need two solar attic fans to get the results you want. All you need to know about attic ventilation. You need that amount of air if not more to get any sort of cooling benefit from the fans. But they re much easier to install since no wiring is needed.

You need the fans to be operating at. Electric attic fans however often increase energy consumption and cancel out any savings unless the attic is not insulated at all. Ideally there should also be plenty of soffit intake space their calculations recommend 336 net square inches of open soffit ventilation to supply 700 cfm. If your attic space is over 1 800 square feet you will need enough solar fans to move 8 000 cfm.

Powered exhaust vents feature an electric or solar powered fan to create an effect similar to that of a turbine view example on amazon. Because solar attic fans operate with a lower power output they are unable to move as much air as some of the other options that are available. The point of having an attic fan is to lessen the load on your ac system saving you money. Ok i would definitely not recommend an attic fan.

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. Intense sunlight can create heat faster than one or two small fans can cool an area. That means you will need to double up your investment in this area. As the sun gets lower in the sky when attic temperatures are at their greatest the fans slow down.

This backdraft can bring dangerous and toxic fumes into your home like carbon monoxide an odorless and deadly gas. The amount of solar attic fans a home needs will ultimately depend on many factors. Many are solar powered and require no other wiring so they don t cause any additional charges on your electricity bill at all. This will make determining the quantity type and placement of solar fans much easier and more effective.

Solar powered attic vent fans usually don t move as many cubic feet of air per minute cfm as hardwired fans. If a cloud blocks the sunlight the fans slow or stop. According to the home ventilating institute hvi powered attic ventilators need to move a minimum of 700 cubic feet per minute cfm for 1 000 sq. To reduce that expense some homeowners buy an electric or solar attic ventilator.

Attic fans can create a negative pressure condition in your home causing vented appliances to backdraft. Vaulted ceilings obstructions and the amount of existing ventilation from soffit vents ridge vents and gable vents should all be considered.