Plumbing in the Home/vinegary smell


We have a vinegary smell coming form one of our heating vents in the family room.  It is only in that room that we smell it.  Sometimes stronger then other times.  I had the vents cleaned but it still stinks.  It comes and goes.  Our furnace is in the garage and the family room is a ways away from the garage. Help please.

Deanna, The only thing I can think of that would give off a vinegary smell that is used in the plumbing/heating field is silicone caulking products and some types of insulation  or insulated duct board.  Some people have said that insulated flex-duct sometimes smells vinegary due to the fiberglass insulation.I would have the duct cleaner run a camera down the line and inspect the runs from end to end. I suppose something could have gotten in from the garage but it seems unlikely.  

Plumbing in the Home

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Jay Nicholas


Plumbing & Heating (warm air, hot water & steam heat)


40 years in the business, 35 years as a lic. master plumber in NY State. Retired

Graduated Magna cum laude at the School of Hard Knocks

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Commercial, residential and light industrial. You name it ...I have probably worked on it

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