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Old 05-09-2011, 08:40 AM   #1
Join Date: Apr 2011
Location: Illinois
Posts: 87
using PVC for heat duct ?

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?
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Old 05-09-2011, 08:46 AM   #2
Join Date: Apr 2011
Location: Illinois
Posts: 87
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
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Old 05-09-2011, 10:42 AM   #3
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Posts: 668
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.
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Old 05-09-2011, 11:40 AM   #4
Join Date: Oct 2000
Location: Clearfield, PA, US
Posts: 60
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.
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