Do I Need A Solar Attic Fan

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.

Do i need a solar attic fan.

How many solar attic fans do i need. Vaulted ceilings obstructions and the amount of existing ventilation from soffit vents ridge vents and gable vents should all be considered. How an attic fan works. All you need to know about attic ventilation.

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. That means you will need to double up your investment in this area. However the utility of attic ventilation fans is actually quite a controversial topic. Good insulation reduces fan effectiveness.

These fans are designed to remove excess heat from your attic which in theory is supposed to lessen the load on the air conditioning in your home. To reduce that expense some homeowners buy an electric or solar attic ventilator. For the attic fans to work at peak efficiency they need to be on a south facing roof slope if you live in the northern hemisphere. Exhausting moderate amounts of attic air as solar fans do can counteract this reducing infiltration my calculations show it to be about right for a vented attic but either do the calculations or measure the pressures.

The amount of solar attic fans a home needs will ultimately depend on many factors. Solar powered attic vent fans usually don t move as many cubic feet of air per minute cfm as hardwired fans. Attic fans exhaust hot air from your attic to the outside. An attic fan is installed on the slanted side of your roof or on one of the gable sides of your attic.

If a cloud blocks the sunlight the fans slow or stop. You will probably need two solar attic fans to get the results you want. Ok i would definitely not recommend an attic fan. The downside of attic ventilation fans.

This pressure balance improvement and the cooling provided by the air flow are most significant in the case of a leaky. Electric attic fans however often increase energy consumption and cancel out any savings unless the attic is not insulated at all. Attic ventilation fans whether hard wired or powered by their own solar panels seem like a low cost and effective way to help keep your house cool. This fan moves 1 000 or more cubic feet of air per minute creating low pressure in your attic.