Do Solar Attic Fans Really Work

Good insulation reduces fan effectiveness.

Do solar attic fans really work.

Ideally this will lower the high temperatures that have built up in your attic. Solar or pv fans run on sun power and pull superheated air out of your attic to be replaced by cooler outside air. 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. If the angle of the sun is lower in the sky morning and late afternoon or the sun s rays are trying to cut through thin clouds or haze the fan spins slower moving less air.

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. This air is then exhausted through the fan to the outside. Website link deleted by editor. 1 by builders and are the highest attribute made in the usa.

The single solar powered attic fan i have has not lowered the temperature in my attic at all. This reduces the amount of work your hvac system has to do to cool your upstairs living area. If you have an upstairs bonus room or bedroom that gets uncomfortably hot in summer consider adding a solar powered fan to your attic. Good attic ventilation is excellent for preventing moisture and condensation but it is usually not enough for cooling in the summertime.

Watch this video to find out more. Attic fans exhaust hot air from your attic to the outside. A retrofit example that works. Strong attic fans can actually back draft furnaces or water heaters by pulling combustion gases out of their burnersand into the home.

If a cloud blocks the sunlight the fans slow or stop. Yes the solar powered attic fans spin at different speeds. Brand name deleted by editor solar attic fans are no. In summer the heat energy from the sun is absorbed and conducted to the attic.

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. Yes during the summer you should run the attic cooling fan. Fresh air is pulled in from your soffits and or roof vent creating a draft through your attic. With more concentration of heat in the attic it can be conducted to the living space creating an uncomfortable environment.

But they re much easier to install since no wiring is needed. 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. Solar attic fans are easily managed and fixed and a great product for proper attic ventilation.