Reelplayer t1_j5au5fu wrote on January 21, 2023 at 5:32 PM

Can you get the noise to stop by using something (like your hand) to stabilize the duct? How have you confirmed the noise is from air passing through the duct and not the fan itself?

As a side note, exhaust fans are notoriously noisy. They are often undersized with a high speed fan. The quietest ones use a larger duct and slower, bigger fan. Insulated, flexible duct can also help.

PerspectivePure2169 t1_j5c72of wrote on January 21, 2023 at 11:05 PM

This is the answer. Something is loose, OP needs to find that and tighten or secure

Adamdaly OP t1_j5ax87o wrote on January 21, 2023 at 5:52 PM

I can’t access the duct while the fans in place, but with the fan unscrewed it’s pretty quiet, I can somewhat trigger the noise while holding the fan in place.