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Old 10-28-2008, 10:37 PM   #1
2 Rivet Member
1975 27' Overlander
saucier , Mississippi
Join Date: Sep 2008
Posts: 34
Rivet Heater

Hi I have a 1975 int 27ft i want to upgrade to a newer better furnace but dont no what will fit is it a major mod or do they make a direct replacment or something close with all the new stuff like auto lighting and what not the one that is in it now is a surbaban dont no the model any help would be great

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Old 10-29-2008, 07:00 AM   #2
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1967 26' Overlander
1968 30' Sovereign
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Mosheim , Tennessee
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If yours is the original furnace, it is most likely an NT series furnace by Suburban. The dimensions may have changed slightly, but the Suburban is still the best candidate for a replacement. I had to slightly modify the ductwork and mounting area when I installed a new furnace in a 1965 Safari, but it was a rather easy job. For your trailer, check out the Suburban NT30SP. This is rated at 30,000 BTUs. Unit size is 12 1/2" x 12". Best of luck to you.

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Old 11-07-2008, 07:40 AM   #3
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1975 31' Sovereign
Pelzer , South Carolina
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About to change the furnace in my 1975 Sovereign, bought a NT30,
old one was a NT32 both ducted. Question, the large steel case the old furnace was in, can I leave it?? Do I need to cut some additional vent holes, seems it would be a huge project to remove. Gas line just needs to be cut off and new fitting flanged on.
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Jim in Pima Az, enjoying our 1975 31 ft Airstream Sovereign
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