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First, a bit of terminology, so we can be certain we are on the same
page:
> "... off to the left are two vent ducts. One is the hot exhaust from the
furnace and the other is probably the kitchen fan exhaust"
Furnace *vent* piping carries combustion products to the outside,
typically for older furnaces this is a rigid round metal pipe around
6" in diameter.
Furnace *ducts* distribute supply and return air within a structure,
typically these can be round, square or rectangular. Except for round
6" duct used at the terminal end of a supply or return it's larger than
6" across, and in some cases it can be made of flexible material.
If what you are seeing is furnace vent piping you are correct in
assuming that it should not be in direct contact with insulation. It
might be possible to enclose in in a box of sorts (a chase), but there
are special rules about how this can and can't be done, and it would
be well beyond the scope of a DIY project for most people even if
local codes allowed it to be done by a homeowner.
> "Music from the attached townhouse next door can often be heard very clearly
through the cold air return in my master bedroom, even though it's not loud
enough to hear through the walls... The heating systems of the two homes are not
connected. I pulled the grill off of the cold air return.... What I saw was a
large space underneath my bathtub and off to the left are two vent ducts."
My first though is: do you know for a fact this this is original, or
has there possibly been a major remodel, or even perhaps conversion
into a 'townhouse" from something else?
Michael Thomas
Paragon Home Inspection, LLC
Chicago, IL
mdtATparagoninspectsDOTcom
eight47-475-5668
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Re: Sound transmission through furnace exhaust vent
