If you have an older home, it may be hard to get proper ventilation through your entire attic. In this situation, excess moisture can build up inside the attic, making it a possible breeding ground for mold and mildew during hot summer months. An attic ventilation fan is a great way to improve the ventilation of your old house attic. The issue is running the wires from the basement to the roof is quite a process. Now you don’t need to wire anything. Let the power of the sun power your attic fan.
Solar Attic Fans
A solar attic fan is an attic fan that has a small solar panel attached to it for solar energy collection. The solar panel converts the energy from the sun into DC power which is then distributed to the fan for use when the temperature in the attic reached a certain point. You set the point in which the fan kicks on. When the fan does turn on, a standard size fan can properly ventilate areas of over 1000 square feet.
Solar Attic Fan Installation
Mark an area you would like to install the attic fan, roughly in the center of the roof about 3/4 of the way up the roof. Remove the shingles carefully, using a flat pry bar and a hammer. Set the shingles to the side for the time being. Remove the tar paper from the area and locate the roof rafters by locating the nails. Position the attic fan so that it sits between the roof rafters and mark it. Cut a hole with a reciprocating saw through the sheathing that leaves enough room for the air to escape through the attic fan. Position the fan over the hole and nail it on the top flange to the roof surface. Lap felt paper over the top for proper drainage and nail the sides of the fan flashing to the roof. Re-install the roof shingles, cutting them around the flashing. The bottom of the flashing should go on top of the shingles to allow proper drainage.
Setting the Solar Fan
The solar fan will either have a gauge on the bottom of the fan that will have to be set from inside the attic, or will have a gauge that is on the side of the fan enclosure allowing you to set the temperature sensor on the roof. A good median temperature is between 80 and 90 degrees Fahrenheit.
Solar powered attic fans are a great way to install a sustainable product, that is self sufficient and improves energy efficiency. What more could you ask for?