Fairly whooshy vent return problem
I just had a Carrier 2 ton AC and Performance 80 installed in a 887 sq ft. condo.
The return grill is in my hallway closet. 26"x16". With the AC going, it's
noiser than I would like. I have a pic for some suggestions to baffle or
reduce the sound. It almost seems that cavity is huge and could well
do with some noise reduction remedy. It's like a mini hurricane in there.
What I mean by that is that there's actually downward flow too and some
of the light insulation debris can be seen moving around by the turbulence.
It that normal? The duct work is pretty good sized round.
The vents on the walls are fine, sound wise.
Anyways, some ppl are limited to their return vent area to mess with.
I'm sure not. That white texture overspray is where air enters in.
I'd appreciate some baffle suggestions. What's better than carpet to lay on the floor in there?
Sound travels in straight lines - air turbulence creates noise
So you want to avoid a straight path for the air to follow and you want the flow-path to be very smooth.
First: did they do a heat load calculation to determine that you actually need 2 tons of cooling and the aproximately 800 cubic feet of air flow for it?
Next: did they test to prove that you are getting the correct airflow? Or did they just set the blower for "the highest speed for cooling" and run out the door with the check? <g>
After the above two questions are answered correctly, and if you can tolerate the loss of space, a blank, well overlapping 'baffle plate' can be spaced out from the wall to cover the return opening.
Or two sets of 45 degree vanes could be installed internally in the air return path.