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I have a conventional gas hot air heater with a/c a-coil on inlet, connected to metal ductwork of my design, no jokes please, which emits a high frequency whine when the fan runs. The noise seems to come from both the supply and return ducts. A point of interest is that this noise is not noticeable at the heating unit. The ductwork is professionally made and installed (?). I applied a good coat of a fiber based duct joint sealer at every connection, mostly inside.
Is there a solution to this problem? Is there a product which I can install in the duct to absorb the sound and not restrict the air flow significantly.
Believe it or not, this is the only disappointment we have with our self designed and constructed home.
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I have a conventional gas hot air heater with a/c a-coil on inlet, connected to metal ductwork of my design, no jokes please, which emits a high frequency whine when the fan runs. The noise seems to come from both the supply and return ducts. A point of interest is that this noise is not noticeable at the heating unit. The ductwork is professionally made and installed (?). I applied a good coat of a fiber based duct joint sealer at every connection, mostly inside.
Is there a solution to this problem? Is there a product which I can install in the duct to absorb the sound and not restrict the air flow significantly.
Believe it or not, this is the only disappointment we have with our self designed and constructed home.