using PVC for heat duct ?

[jimzz2001]

I am in the process of replacing the flooring in our 1985 Georgie Boy Class A. I took out the seating to reveal the flexible heat duct tubing is in poor shape...many tears and holes, so it needs to be replaced.

I am wondering for the longer runs would it be possible to use 3" PVC pipe? I would think it would be more stable, and more efficient to deliver the heat where it was to go?

Any thoughts on this or should I just get some of the flexible stuff and repair as needed with duct tape?

[jimzz2001]

right after I posted I found this link on another site I go to for stick built projects... not many replies but looks like it should be ok. think I will go out and look at it further

Using PVC Ducts Instead Of Standard Ducts - HVAC - DIY Chatroom - DIY Home Improvement Forum

still looking for thoughts and opinions though

[BA-in-Mich]

You know i wondered this myself. I looked at the link that was posted and the last post the person responded that PVC ductwork and connectors are not cheap. I always thought if I did it it would be with plumbing PVC. With my Georgie Boy the duct work to me has a plastic smell and if possible I avoid using the furnace. I guess if I was to do it I would run a couple of runs of 3" PVC pipe and let the furnace run for a hour or so to see if you could smell the PVC.

[Joe O'Melia]

Look at flexible gas dryer vent is metal and very tough or aluminum foil flexible dryer vent also they make flexible insulated heating duct, but in some locations in a RV you want the heat loss from the duct to keep the pipes from freezing.