How to Build Your Own Whole House Fan Cover

Lead Image
What You'll Need
Utility knife
Fiberglass sheet
Tape measure
Attic fan
Duct tape
Eye protection
Safety gloves

In the winter, your whole house fan can go from being an asset to a liability. It essentially becomes a big hole in your roof, through which heated air from your living space escapes into the attic. The solution to this is a cover. Creating your own whole house fan cover is possible with the right tools and directions. Follow the steps below for an easy DIY fan cover project.

Step 1—Measure the Fan

Use your tape measure to determine the size of your whole house fan. This will help you cut the fan to the proper dimensions.

Step 2—Cut Material

There are different materials you can choose from when building your fan cover, including plywood and metal, however fiberglass is one of the best materials to use when creating a cover for your whole house fan. Now, use your utility knife to cut the fiberglass sheet to size, matching the measurements that you have just taken.

Make sure you are wearing safety goggles and a pair of safety gloves. This will ensure that you do not cause any harm to yourself with the flying fiberglass shavings.

Cut the fiberglass so that it is about 20 inches longer in length than the diameter of the fan is itself. Make sure you are careful not to damage the foil that is contained on the bottom. This should then leave you with the right-sized cover for your fan.

Step 3—Install the Cover

Now that you have successfully made the correct-sized cover for your fan, install it in the appropriate place. Use your screws and screw gun to put the cover over your fan.

Make sure you don't over tighten the screws and cause damage to your newly-built cover. It is important, however, to make sure that the screws are secured tightly enough so the cover stays on with no problem.