Solar Attic Fan Installation Guide
Keeping attic temperatures low is an easy job for a solar attic fan. If you live in an area where you have typically face high temperatures all year round, you have air condition to keep you and your home cool.
Installing a solar attic fan is easy and can be done in about 30 minutes. Furthermore, you do not need professional help since it does not require any kind of electrical wiring to install and operate. You will simply need a few basic tools that you very likely already have in your home or can easily rent from a local hardware store.
Parts of Solar Powered Attic Fan
A. Self-Tapping Screws
B. Solar Panel
C. Connecting Wire from panel to motor
D. Adjustable Solar Panel
E. Aluminum Shroud
F. DC Motor
G. Motor Isolation Bracket
I. Stainless Steel Wire Mesh
J. Shroud Support Bracket
K. Stainless Steel Head Screws
L. Aluminum Flashing
Necessary Tools for Installation
You should always follow the installation guide that comes with your solar-powered attic fan. This is simply an overview of how to install a typical model.
Choose a spot on the south side of the roof for optimal placement of the solar attic fan unit. If selection of the south side is not possible, then the fan can be installed on an alternate spot for optimal sun light. An adjustable solar panel will also help to capture the maximum amount of available sun light.
Hammer a nail from the inside of the attic between two roof rafters. Push the nail through the roof shingles. Measure the length of the flashing and divide it by half. (If it is 19" in length, then half would be 9.5".) Next, cut a length of string or twine equal in measure to half of the flashing diameter (9.5" in this example).
Ascend to the roof via the ladder, but remember that whenever you are working on the roof,
the most important thing is safety. To prevent accidents, use a safety harness. Tie the length of
string from step two to the nail from step one and attach a marking pen to the other end.
Use the pen to draw a circle on the shingles of your roof.
With the knife cut the shingles in a previously circle.
Remove the nail. Then it's time to remove the shingles within the circle from the previous step.
Using your knife, carefully cut up to 4" through the shingles at the 3 and 9 o'clock positions.
This will allow room for the flashing footprint to be inserted under the shingles.
Insert the saw blade sideways at the 3 o'clock position and begin cutting the roofing
spikes up and around to the 9 o'clock position. This process will remove nails that will
prevent the flashing footprint from properly sliding underneath the shingles.
Measure the diameter of the inner side of the attic fan. Use this measurement to create a ventilation hole in the roof sheathing. Be sure to only remove roof sheathing.
Use the saw to cut a hole in roof. Generally roof rafters have either 16" or 24" of distance between them. If 16", the roof rafter will run through the previously cut hole. If 24", the attic fan will be centered between the rafters.
Remove the shingles from around the vent opening. Apply tri-polymer roofing cement or caulk around the edge of the hole.
Slide the flashing underneath the tar paper and shingles. Take care not to transfer the
roofing cement onto the exposed shingles. Force the flashing up until the shingles come into
contact with the raised portion of the flashing. The bottom side of the flashing will be on top of the shingles.
Position the four screws around the flashing. Two screws go on either side, and the remaining two go on the top and bottom. The side screws should go underneath the shingles. The top and bottom screws should go on top of the shingles.
Since the screw heads located at the top and bottom will come in direct contact with weather
and the elements, protect them with a layer of caulk. Use the remaining caulk to seal slits made
around the area where the shingles touch the raised area of flashing.
Position the solar panel so that it will absorb most sun light.