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Old 11-09-2007, 09:55 AM   #1
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Springfield , Ohio
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Furnace replacement in 345

I'm throwing in the towel on fixing the fron OEM Duo-Therm furnace. It's a model 901 as I presume they all were. Does anyone have a reccomendation for a direct replacement that doesn't require a lot of hacking to install. I'd like to keep the "stock" appearance.
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Old 11-09-2007, 01:24 PM   #2
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Speedway , Indiana
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JKW,
I have replaced the rear furnace in my 345 with a new unit. My front had allready been replaced when we got our 345. Do a search under my name and you will see my post on "345 rear furnace replacement".
You will have to make or have made a piece to cover the original intake and exhaust holes in the outer skin. No big deal.
Hope this helps, Rob
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Old 11-09-2007, 01:47 PM   #3
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Another thing I just thought about. On the front unit the cover on the furnace that faces the inside of the MH has to be modified. The lower portion of the cover is modified to supply the isle rectangular vent with heated air. If needed I can post a couple of pictures.
Rob
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Old 11-09-2007, 02:20 PM   #4
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RE: Furnace replacement

Rob,

Thanks for the input. It is my front unit that needs to be replaced. I did see a post where someone had installed an Atwood unit and did a very nice job.
It required however installing a large door on the side which I prefer to avoid.
I'd like to find a unit that can be installed using the original ducts and intake/exhaust.
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Old 11-09-2007, 06:05 PM   #5
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1985 345s

We have 2 345s made months apart. One has horizaontal exterior vents and one has vertical -------go figure!
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Old 11-11-2007, 04:07 PM   #6
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replacement furnace

I take it that nobody has any suggetions for replacement models that will fit?
Amazing. I expected a plethora of suggestions..
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Old 11-11-2007, 06:04 PM   #7
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i tried a google search and that came up short too. you might send lew a PM message.

http://www.airforums.com/forums/members/lewster-10325.htmlhttp://www.airforums.com/forums/members/inland%2Brv%2Bcenter%252C%2Bin-39.html

oh, and let's not forget that quiet guy ;-)http://www.airforums.com/forums/memb...C%2Bin-39.html
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Old 11-12-2007, 11:38 AM   #8
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Another couple of suggestions would be to call the Service Center in Jackson Center and ask them how they would solve your problem.

Also, given the model number of your existing furnace, you should be able to look up dimensions and configuration. Vendors of new furnaces SHOULD be able to recommend replacement units (there could still be issues)
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Old 11-12-2007, 05:54 PM   #9
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choctaw , Oklahoma
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I had the rear furnace valve malfunction and burn up the side above the exhaust hole. Had to cover a large area with new skin. Got a Suburban and cut holes in the new skin. Had to re-route the sewer vent and the water lines (the H2O lines got a little hot from the fire anyway) Works great, don't sound like a blow torch like the Duo-Therm did/does. The front is still the original blow torch Dou-Therm.
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Old 12-01-2007, 02:18 PM   #10
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1985 34.5' Airstream 345
Fishers , Indiana
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I did take one of our 345's to Jackson Center to have the front heater fixed. They had the MH for several days and charged several hundred dollars to finally tell me they could not fix it and provided no guidence on upgrading other than that modifications to the outside would be required. That is why I came back to our own shop and put in the exterior installed Atwood (see previous post with details) which is easily serviced and is commonly used on new RV's today. But, I agree with you that we all try not to make too many changes to the exterior look. However, after it was done, I really did not notice the exterior change as much as I thought I would.
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