Introduction to Solar Attic Fans

Published October 2013 by

There’s a reason spring cleaning is in the spring, because our attics are far too dark in the winter and far too hot in the summer. Unfortunately, the heat that builds up in their can negatively affect the overall temperature of our homes (not to mention the sheer amount of dust that builds up on our belongings!).

Sometimes you can spot a passive vent on an attic, it’s usually a free moving fan, that’s designed to rotate with the wind. This type of ventilation does very little in the way of cooling your attic, especially without a breeze. A solar powered attic fan, on the other hand, can reduce the amount of heat in your attic and circulate air to reduce moisture. And running the fan is absolutely free because it uses solar energy!


A solar attic fan can be installed on the roof itself or on the side your house. The unit usually comes as one piece so it’s a quick and easy project to get up and running. You simply cut a hole in the roof to fit the fan, ideally facing due south but any southward direction should be fine. The solar panel attached should be angled to face the sun. Once the fan is mounted and sealed, if the system has a controller you can mount it to a rafter beam nearby to monitor the temperature and humidity in the attic. The process is essentially these same for if you install it in the wall, similar to a window-like vent.


If you have allergies, depending on your settings, it could bring pollen and dust into the house. This is something important to keep in mind when running the fan. If you live in a humid area, the fan could suck in humid air. Just be aware of the weather and your fan’s settings and you’ll be fine.

Solar attic fans are a great way to keep your house cool in the summer. The device is powered using renewable, clean solar energy and will suck the warm air out of your attic. The colder the attic, the less heat will radiate down in to the central parts of your home, the less your air conditioner needs to work. Look into installing a solar powered attic fan today!

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