In january 2011 i noticed a loud noise from one of the roof fans located above my bedroom.
Noisy roof exhaust fan.
The fans are vented out the roof through a vertical pipe connected to the fans by an insulated flexible ducting above the ceiling.
Be sure to lubricate the bearings.
Climb onto the roof and locate the vent that is causing the noise.
I have lived at the top floor of a 12 story high rise apartment for over 10 years.
The noise is annoying but i m also concerned about the heat loss in the winter.
Attic fans also have small ball bearings that help lubricate the fan s movement.
I contacted apartment service and they told me that they just changed the fan belt on the roof ventilation fan and that the belt needed to break in.
Climb the ladder remove the access panel and enter the attic.
Some of this noise can be reduced by adding a flexible insulating padding layer between the fan s mounting flange and the roof sheathing to absorb some or most of the vibration and sound.
Due to regular wear and tear these bearings can become worn out or lose their lubrication ability.
Often a stiff wind will open vent dampers causing them to periodically clang shut.
Tighten the fan s mount and other loose parts.
Remove the old vent.
This is actually the most common noise issue with attic fans.
These are located in the track where the pipe coming out of the roof meets the spinning part of the vent.
The mount can become loose especially on fans that are installed on the roof.
Typically it is impractical to attempt.
Find the noisy turbine and apply the lubricant to the moving parts of the turbine.
The attic fan tends to makes a humming noise when it has a few blades and is running at a high speed setting.
The other option is to call the manufacturer or the store where you bought the attic fan and see if they have any available for the exact model you have.
Remove the current worn out bearings and replace them.
This can cause the fan to start making constant noise and in some cases even a loud squealing sound.
The vent hood ducts through a rigid or flexible pipe to a cap on the roof or side of your home.
Attic fan making humming noise.
Remove the screws holding the vent in place.
It was very annoying.
Place the stepladder under the attic access space.
We live in a windy area and the flabber doors on the fans are often banging open and shut.
If the noise drives you crazy new spring loaded backdraft dampers 9 to 30 depending on the size should solve the problem.
Lift up the edges of the surrounding roof shingles so you can see the edges of the vent.
Cut through any sealer that may be present.
Our turbine roof vents whirlybirds were really noisy and had some rattling that was causing some vibration in the house.
