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loud return duct

Paul S_3
Paul S_3 Member Posts: 1,257
hey everyone i installed a new 100,000 btu 95% warm air furnace new duct work supply and return....everything operates fine, except for the return duct is very loud...furnace is in basement and return duct goes straight up 10 feet to first floor into a return box....it is NOT a AIR FLOW ISSUE, temp rise is fine and if i take the blower door off to allow maxinum air to go through system i still have the noisy return. the noise just sounds like the blower wheel & motor running....is there a way to reduce the noise with running the return duct a certain way or is there such thing as noise reduction ductwork for example if i get ductwork thats insulated inside it??? any help would be greatly appreciated   thanks   paul s
ASM Mechanical Company
Located in Staten Island NY
Servicing all 5 boroughs of NYC.
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  • VictoriaEnergy
    VictoriaEnergy Member Posts: 126

    Replace the return air drop with a larger one lined with accoustic insulation and isolate it from transfering vibration with a fabric duct connector.  It works great.
    Home Owners Please Note:

    You are receiving advice from some very skilled pros completely free of charge. One of the reasons I participate is to sharpen my own troubleshooting skills. So; did we get it right? I would be grateful if you extend this courtesy back by posting the final outcome of the issue you are inquiring about. Thanks
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