How can I reduce the noise from an air handler unit?

I have a Goodman AR42-1 air handler unit in an open closet. The setup looks like this:

Air handler setup

When the air handler activates it sounds like this:


Current sound levels:

Everything off:           36 dB
A/C on and inside closet: 63 dB
A/C on with door closed:  59 dB
A/C on in Living Room:    55 dB

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  • It sounds like vibration noise, suck/blow noise and squeaky fan? For the vibration you could try a rubber matt under the assmbly, if the entrire wall vibrates not sure you can do much with out a major rework. The suck/blow. Does the lovred door being open closed make any difference to that noise... may be indicitive of not enough makeup air. Squeaky, oil it?
    – beast
    Commented May 23, 2016 at 14:49
  • 1
    Funny timing, I just moved out yesterday so I can't test any theories.
    – Joe
    Commented May 24, 2016 at 20:29
  • soundproofpeace.com/soundproof-water-pump Commented Aug 12, 2021 at 17:48
  • 55dB is about the same as my dishwasher. Unless you're recording, odds are that if you gave it some time you'd brain yourself not to notice it. My boiler makes a bit of a thump when it ignites; seemed loud when I'd just moved in but I can't remember the last time I consciously noticed it.
    – keshlam
    Commented Aug 20, 2023 at 12:54

1 Answer 1


I don't have air handlers, but I am into audio.

Air going thru pipes is like a speaker. It makes noise. Make sure everything is tight. It may sound crazy, but I put a 2 inch plastic pipe to my ear and "pin point " where the noise is coming from.

Once all that is done, wrap the pipes. Improves efficiency as well.


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