Additional return duct addition cost

noname · 2015-06-28T20:59:52+00:00

I had a HVAC contractor come over and evaluate the loud noise we get from o ur vent in our living room (built in 05). He says the original contractor under spec'd the size of all the return vents in the house causing us to he ar the blower through the vent (The 16x20 vent could suck a piece of cardbo ard down it there is that much pressure). His solution is to add another floor return vent across the living room. S o he will cut a hole in the main return line at the furnace and run a flexi ble line about 12 feet and cut a hole in the floor and add a vent. Quote is $1250. To me that seems somewhat high as I can't imagine the part s will cost more than $250 and the job (to my mind) can't be more than 4 ho urs. Should I get a second quote or does that quote seem rational?

Jun 28, 2015 21 Replies

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noname 11 years ago

In CT, the main duct work is solid rectangular, the offshoots are the flexible type.

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trader_4 11 years ago

It does have higher restriction, exactly how much IDK. But that can be made a non-issue by correctly sizing it. Noisier, I strongly doubt. I've seen it used in many new houses, and there is no noise. If anything, you'd think the nature of it's construction would tend to absorb noise. And it sure doesn't have the bang noise that aluminum duct work can have when the blower starts up.

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