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?