Do I Need A Solar Attic Fan

Ok i would definitely not recommend an attic fan.

Do i need a solar attic fan.

You will probably need two solar attic fans to get the results you want. Powered exhaust vents feature an electric or solar powered fan to create an effect similar to that of a turbine view example on amazon. 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. Intense sunlight can create heat faster than one or two small fans can cool an area.

Electric attic fans however often increase energy consumption and cancel out any savings unless the attic is not insulated at all. If a cloud blocks the sunlight the fans slow or stop. To reduce that expense some homeowners buy an electric or solar attic ventilator. As the sun gets lower in the sky when attic temperatures are at their greatest the fans slow down.

This fan moves 1 000 or more cubic feet of air per minute creating low pressure in your attic. But they re much easier to install since no wiring is needed. That means you will need to double up your investment in this area. You need that amount of air if not more to get any sort of cooling benefit from the fans.

If your attic space is over 1 800 square feet you will need enough solar fans to move 8 000 cfm. This will make determining the quantity type and placement of solar fans much easier and more effective. Attic fans can create a negative pressure condition in your home causing vented appliances to backdraft. The point of having an attic fan is to lessen the load on your ac system saving you money.

You need the fans to be operating at. 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 amount of solar attic fans a home needs will ultimately depend on many factors. 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.

Solar powered attic vent fans usually don t move as many cubic feet of air per minute cfm as hardwired fans. Vaulted ceilings obstructions and the amount of existing ventilation from soffit vents ridge vents and gable vents should all be considered. Ft of attic space for example 20 x 50 to be effective. To determine the number of cubic feet per minute needed for a power vent fan multiply the number of square feet in your attic by 0 7.

This backdraft can bring dangerous and toxic fumes into your home like carbon monoxide an odorless and deadly gas. 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.