I have a HVAC duct that is almost totally blocked. It has
been this way since my home was constructed. I suspect a crimped vent
or trash in the vent. The problem is the obstruction appears to be a
good distance away from either end. I have easy access from the
basement and from the second floor outlet. In between those is a long
run with several 90º elbows.
I don't want to start tearing up floors and walls to correct
the problem. I am looking or suggestions. I was thinking of a camera
that could be snaked through the vent. Since I don't know which way
some of the turns may be just snaking a standard snake would not
likely be really helpful
Suggestions? Sources for a rent a camera?
Long run, several elbows and if it takes off from the lower pressure side of
the plenum might be perfectly normal.
Not all discharge vents have equal air flow.
You might be able to rent a sewer cam from a rental store. I think I saw
one in a Harbor Freight ad a while back.
Are you sure there is not a damper installed in the duct?
My system has dampers on all ducts located near the furnace at the main
plenum. Look for a small handle sticking out he side of the duct(s).
I'd try the local tool rental shops for a camera. Or take a look
online. There are cheap cameras you can hook to a notebook PC. You
might be able to use one of those connected to a snake with a
If it's a small duct, It's also possible that with multiple 90 turns
and a long run, the duct isn't blocked, it just can't carry much air.
On Feb 27, 10:05 am, email@example.com wrote:
I think USB is specd to work to 15 ft. Which would seem to be long
enough, given that you can get at it from both ends. Also, that's
the specd limit, I would guess it's fairly likely you could go
*When doing some remodeling on homes, townhouses and condos I occasionally
notice that some ducts from the original construction are sometimes a little
crushed. However what I find more often is that duct connections are
separated. Some of them were just shoved together without screws or foil
tape and they came apart for whatever reason. Sometimes in attics I see
flex ducts that are flattened from tradespeople and homeowners climbing over
them. I have also seen flex ducts that have holes chewed in them from
Check out plumbing supply companies. You may find one that rents a camera
or perhaps they can refer you to a company that does.
I have one that doesn't go anywhere at all. Building inspector must
have told the builder to install a cold air return in a hallway.
Builder cut out a square of drywall, stuck in a grill, and called it a
On Feb 27, 1:39 pm, firstname.lastname@example.org wrote:
I wish that were the case here. It's just an empty cavity bordered by
the top plate, the bottom plate, and two studs. Stuck my head in and
looked. And, yes, the HVAC performance on that floor is not very
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