We recently had a new forced air furnace and return installed. The unit works great, but the return (which is in an adjacent closet to the furnace closet) is quite loud. What are some solutions I can explore to reduce the general noise the furnace makes as it is circulating air?
How to reduce the noise from the forced air furnace
forced-airfurnacenoise reduction
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Best Answer
Similar to Mazura's second answer, the Ductwork from the from the return can and should be really long. If you have the room where the ductwork for the return is, make it really long and zigzag it. Mine could be a Direct shot of 10', though I think they installed over 30' of ductwork and it curves all around the place.
You can detach it from either end, add a coupling and then add more duct.