It might be something else.
Air conditioner return vent noise.
6 best ways to soundproof an air vent because the easiest and most effective solutions to stop noise from coming through air vents involve closing off the holes entirely i ll start by suggesting 3 ways to do that.
Ducts don t make much noise on their own.
All air vents meaning supply registers ceiling diffusers floor vents and return grilles make some noise when the system fan is running.
Despite their name it s also through these outlets that the air conditioner takes in air.
Some systems are much louder than others.
When this is the case too much air is being forced into a confined space which can cause whooshing or whistling sounds.
Dirty air filter a dirty filter acts like a barrier to return air forcing the blower to work harder and longer to circulate air say hello to a larger electric bill.
If the usual noise volume increases or you start to hear flapping rattling or high pitched sounds from the supply vents return grilles or ceiling diffusers it s likely due to an increase in pressure caused by airflow restrictions somewhere in the hvac system.
Everything was fine until the air conditioner came on.
In my home the air filters are located just inside of the two large return air registers.
Blocked return vent the return vent may be blocked due to dust or other debris.
Check the filter and change it if it looks like the one on the right in this picture.
It s normal to hear some noise coming from your air vents when the hvac system is running.
Depending on how close you are to the fans of the air conditioning system you can hear the sounds of the fan pushing the air through the ducts.
Still let s go through some ideas on how you can reduce the noise coming through your air vents.
Poor duct installation jobs will often result in large return vents paired with small ducts.
Some systems are louder than others.
Noisy air vents high pitched noise.
The air moving through them makes noise and a variety of factors can make air movement more or less audible.
Except it might not be your ducts.
Once the dampness is separated from the air your ac unit cools the warm air and sends it back into your home through the return air vents.
Now those noisy air ducts are intruding on your solitude.
An air conditioner works by absorbing the warm air and moisture from your home.
Another sign of poor ductwork and a culprit of noise coming from your air return vents is unlined return ducts.
When i installed better i e.
