My condo is 887 sq. ft with the furnace/evaporator in a small hall closet with the air return below it (by design).
2 Ton Carrier 38HDR and Carrier Performance 80 furnace. The 2 bedroom 1
bath has only 5 registers and the return (which is plenty big).
I know the circumstances with having a small condo and everything in a small hallway closet. Howerver, I just feel there is more I can do to lessen the
noise coming thru the duct work. The duct work is flex insulated, but the
thing is...there's such a short run from the plenum to each of the 5 registers.
This causes a louder noise than I would like. Not extremely bad, but somewhat like the distant sound of the ocean roaring coming thru the ducts.
I've done about as much sound absorbing at the large cavity return under the furnace. The company tech is coming out tomorrow afternoon to look at it.
I'll have him check the CFM because when I stand 8 ft. back from the large living room register up near the ceiling...it actually blows my hair back, and moves my vertical blinds quite a bit.
It cools the unit well, and everything is working fine.
I'm mulling over maybe having the duct lengths extended and using flex
insulated acoutical ducting, the kind with perforations inside. I'm thinking
extending the duct runs might help with the ocean sound. Thoughts?
I realize the limiting factor of having HVAC in a small condo hall closet, but I'm determined to at least attempt some quieting.
Any help appreciated before he arrives tomorrow afternoon. Thanks guys.