Attic fans are a great resource to help keep a home cooler in the summer, especially on hot days. Stale air can accumulate in the home, but the attic fan will help bring fresh air inside. They must continue to run to receive the best results, but a noisy fan may not be worth the effort. If you can figure out why your fan is noisy, you might be able to fix it. Here are seven reasons your fan might be making so much noise.

1. Blades Out of Balance

A clanking noise may be a sign the blades are out of balance or bent. Several options include trying to bend the blades if it is obvious that is the problem or replacing them. Either method should remedy the issue.

2. Rusty Motor

As a fan motor ages, it may become rusted from the humidity in the attic. The motor has many components making it a difficult chore to check. It would be advisable to replace the unit to eliminate the noise.

3. Loose Screws

The unit is attached to the wall with screws, and with time, the screws may become loose because of the constant rotating fan. The vibration will become obvious but can be easily fixed by tightening the screws.

5. Check the Bolts/Screws

If the screws don't have any padding at each bolt/screw, this could be the problem. An isolation pad needs to be in place for each bolt to eliminate any vibration noise. You can purchase them at a mechanical supply store if they are not on the unit in the attic. If it is a new fan, the padding should be included.

6. Bearings

The fan has ball bearings to help lubricate the motion of the unit and reduce the noise. Wear and tear may cause them to become damaged, making the fan noisy. Replacing the bearings is simple by using the same type from the make and model of your current fan.

7. Bird Mesh

If you have screen mesh over the unit to prevent animals from getting into the attic, it may be loose. Check to ensure the mesh is securely fastened. This can cause a mechanical vibration.

Your attic fan should give you many years of satisfaction. You will also enjoy fresher air with the added circulation.  If you troubleshoot the unit and don't discover the problem, it may be cheaper to replace the unit. If you don't want to bother with the problem, it may be time to call a professional technician. For more information, go to sites like http://www.alliedairheat.com.