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Old 07-02-2009, 07:32 AM   #1
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Replace a NT24 with a NT30 Okay?

New furnace time for me. My old rear bedroom furnace is a Suburban NT24 and I wonder if it is okay to use the NT30? The NT30 may be more common as a replacement furnace. But I wonder if the larger furnace will give rapid heat cycles instead of even heat. My front furnace provides about a 5 degree difference between ceiling and floor, and about a 5 degree difference between off and on. Not the most comfortable thing. Outside temp was about 25 degrees.

Anyway, is it okay to install a larger rear furnace?

David
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Old 07-02-2009, 07:39 AM   #2
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Your old NT24 should have had the trailer warm as toast. You don't need a bigger heater, you just need one that works right. The is a lot of difference in the size of the heaters. Fitting in an NT30 could prove to be difficult. Measure the old heater carefully and the check the specs on the new heater. It's better if the new one is the same size or just a little smaller.
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Old 07-02-2009, 08:16 AM   #3
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Installing a furnace rated at or near the same should be fine. The heat cycling can be somewhat controlled by the anticipator setting on the thermostat. The setting controls when the furnace cycles on and off. I'll have to admit, when it's that cold (25 degrees outside), the furnace is working very hard to keep ANY trailer warm.
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Old 07-03-2009, 06:32 AM   #4
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Where To Buy Furances

Where is a good place to buy a replacement Suburban furance. Camping World? The NT24 and the NT30 are the same size. Maybe the burners and gas flow are different. I think I have the anticipator in the thermostat adjusted correctly. I'm no HVAC engineer, but I didn't want to oversize the furnace to the point of having it blast out heat to quickly and inefficiently.

David
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Old 07-03-2009, 10:12 AM   #5
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I don't think they make the NT-24 any more.
I looked for one a year ago and couldn't find one anywhere.
Ended up getting an NT-30, it uses a little more current for the fan (than the NT-24) but a lot less than the original one in my 1965 Safari. The bigger furnace may not run as long so the higher current usage may be a wash. (NT-24=3.5amp;NT-30=5.5amp;Original 25K-BTU=9.2amp)
The NT-30 should work fin as a replacement
BWH
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Old 07-04-2009, 05:48 AM   #6
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Good Place to Buy a Suburban NT30?

Thank you BWH. Since we don't boondock very much, the current draw won't be a big issue for us. I just didn't want to install a "bonfire" when a "campfire" will do.

I have not seen the NT24 for sale yet, but the NT30 is readily available. I believe they are in exactly the same sheetmetal casing.

Where is a good place to purchase a new Suburban NT30?

David
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Old 07-06-2009, 10:59 AM   #7
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dbj216 - asked - Where is a good place to purchase a new Suburban NT30?

I don't know, I got mine from an ebay seller that had a couple new ones that he was clearing out when he shut down an RV repair business.

I would check: Andy @ Inland RV, PPL Motor Home, Kearbey RV, ebay, do a Google search, and any local RV shops. Good Luck

BWH
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Old 01-29-2010, 09:56 PM   #8
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if you haven't purchased your heater, I would suggest American RV in CA or Adventure RV in TN
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