NT22A Furnace replacement

[Blues Bill]

I have a 1971 25' Tradewind with what appears to be the original NT22A furnace and I believe it needs to be replaced. I would appreciate suggestions as to what to replace it with. I know that the 22000 BTU is no longer available. Can anyone tell me if the NT30 would be a direct replacement, or will I have to modify the ductwork?

[Lumatic]

Originally Posted by Blues Bill

I have a 1971 25' Tradewind with what appears to be the original NT22A furnace and I believe it needs to be replaced. I would appreciate suggestions as to what to replace it with. I know that the 22000 BTU is no longer available. Can anyone tell me if the NT30 would be a direct replacement, or will I have to modify the ductwork?

You can use a new NT30 but you have to make some modification. You need to build a base to raise the furnace to a level which will line up with the original inlet/ exhaust outlet. If you want to use the original ductwork you need to build a plenum. I used wood for the new base and repurposed the old furnace cabinet to use as a plenum. I believe you can find this info in the archives if you do a search If you need more help let me know.

By the way the NT22 was recalled because of CO leaks.

[Mx468]

I used the nt30s for my 1971 replacement furnace, I used the original plenum and had to raise it as well to line up with the furnace exhaust holes. PM me if you need any help.

[strangepod]

Just recently did this on my 76, it had a NT24 but the idea was the same. All I had to do is raise the furnace up, I think it was about 1.5 inches or so. Everything else lined up. I found the NT-30 online and paid somewhere around $600 shipped. Good luck!
John

[Blues Bill]

Thanks all for the replies.
Anyone have some pictures of the modifications used? I have removed the old unit and am ready to rehab the old case/plenum for the new unit.

[strangepod]

Originally Posted by Blues Bill

Thanks all for the replies.
Anyone have some pictures of the modifications used? I have removed the old unit and am ready to rehab the old case/plenum for the new unit.

Bill,
I will post some pictures later this morning of what I did and what I would do differently.

John

[strangepod]

Bill,
Sorry for the delay, here are the pictures of the way I did it, the 2x4's are OVERKILL and I would have scaled it back some (like 2x2) if done again. also I had to raise the front up about 1/2" vs the back(side against the skin) due to the curve in the trailer - Hope this helps..
John