wrote in message
...
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.