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Old 03-31-2007, 07:36 PM   #1
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2008 31' Classic
Benton Harbor , Michigan
Join Date: Mar 2007
Posts: 47
Need help with furnace dimensions

I tried to post this once but got a "Server too busy" message. My '88 Excella has a Suburban NT-35K furnace that I am considering replacing but the available new furnaces appear to not fit the space of my old one. Does anyone have the dimensions of the location of the inlet and exchaust pipes relative to the box for the NT-34SP and the SF-35F? It appears that the NT-34SP may have these pipes higher than my current box. The inlet is about 4" up from the floor. Also, my current setup has two exhausts and one inlet, so I guess I would have to plug the second one.
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Old 03-31-2007, 08:32 PM   #2
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Naples, FL , Hood River, OR
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Hi 'Coast,

It looks like the newer units will not fit your existing outlets based on my observations in servicing many of them. You might try the Suburban website for dimensional drawings, or call their tech line for more info.

New units can mount either from the inside or outside of the rig. You might be OK if you get an exterior mounting model and get a brushed stainless or aluminum cover for it. It would blend right in to your exterior of the trailer, and you would have a perfectly aligned cover too.
Lew Farber...RVIA Certified Master Tech...ABYC Certified Master Marine Electrician
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