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Old 11-28-2012, 05:27 PM   #1
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Replacing furnace!

Dang! I know I'm getting old, but it just took me like 2-1/2 hours to get the old Suburban NT24 M out of my Tradewind! And that's not even trying to take the scumsucker apart to put in a new motor!

(I guess it didn't help that the cabinet was pretty much holding up the kitchen counter)

As old as this is (35 years), and as much of a biscuit as it was to get out, I ain't puttin' anything back in but a brand new one... unless someone tells me the new ones are junk.

So, two questions:
  • Are the new Suburban furnaces as sturdy as the old ones?
  • Who's got the best price shipped on a Suburban NT30SP?

TIA!

Don
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Old 11-28-2012, 07:06 PM   #2
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I commend you for doing it and being able to articulate how you did it w/out the use of some other words.
We replaced our suburban NT 24 with I believe a NT 30 back in 2000 and that new version has been excellent. It is very efficient, was not cheap even at that time but has worked great.
I'll have to pull the paper work, but we have used it in the past recently with a new thermostat and it kicked right on when the temps in the trailer hit 58 over in Boone in Oct.
We are actually looking at replacing our current roof ac unit with a new duotherm model 651816 15K (13.5 amp) ac/heat pump connecting the roof HP to the suburban furnace. Seeing you are out in AZ, this might be an option to add a new ac unit with hp that is good on electric down to 35 degrees. The only reason we would do the hard wire connection to the suburban furnace is due to the temps on the east coast here dropping below 35 degrees where as the HP will not work.

The cost to the new suburban furnace back in 2000 was around $1250.00 to include labor. when the old one died at 10 degrees and a broken water line on the back bathroom carpet, the price was a good deal in April 2000. A new duotherm AC unit with non duct ADB and CCCII thermostat and a duct adapter kit so the air flow would not blow over the mid coach beds was quoted at $1727.00 and three hours of labor at $270.00 done at the dealer. So you might be able to get this cheaper and install it yourself and have a very efficient new ac/heating system. Again, it would only be electric, but draw only 13.5 amps, so a 3500 generator would run this, if you wanted to boondock.

great to have options and good luck.

SL4BLLT
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Old 11-28-2012, 07:23 PM   #3
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I replaced the 1974 NT-32 this past spring with a brand new NT-30. The case on the new one isn't as heavy a guage as the old one, but the new one is more quiet, has electric start, and is about an inch and a half less overall height.

The last item means that if you intend to use the same holes in the outer skin of your TT, you will probably need to build something to lift the case up.

"Something" needs to be fireproof, by the way.

Prices vary a lot. I paid $512 delivered to me here in Canada from the NT-30, but that company seems to have exited retail sales.

Good luck with your project! Don't forget to post lots of photos...
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Old 11-28-2012, 07:38 PM   #4
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I commend you for doing it and being able to articulate how you did it w/out the use of some other words.
<snip>
SL4BLLT
You can imagine, I'm sure, that the "other words" were used liberally during the actual furnace extraction process!

Best price I've found so far is like $588 shipped for the NT30SP, at pplmotorhomes.com.
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Old 11-28-2012, 07:49 PM   #5
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The new Suburban furnaces are lighter weight partly due to the stainless steel burner they use now vs. the old cast iron one (which rusted). The blower may or may not be quieter than the old one, it will most likely use somewhat less power. The electronic ignition is wonderful vs. the pilot light system.

You are doing yourself a favor in replacing it, for safety reasons alone. The combustion chambers tend to rust out, and that is never good.
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Old 12-22-2012, 07:24 PM   #6
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Well, the new one is in and working, but I still have some kitchen cabinet pieces to put back together.

The gas and electric were - relatively - a snap. Physically getting the old one out and the new one in was not a snap.

Is it just me getting older, or is every last thing on these trailers a real serious PITA?
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Old 12-22-2012, 08:59 PM   #7
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Well, the new one is in and working, but I still have some kitchen cabinet pieces to put back together.
Out of curiosity, which size furnace did you get?

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The gas and electric were - relatively - a snap. Physically getting the old one out and the new one in was not a snap.
Yes, my experience exactly. I didn't have a flare tool to re-do the shortened gas supply pipe, and wound up buying a cheap cruddy one for $40 that just did not make the job any easier.

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Is it just me getting older, or is every last thing on these trailers a real serious PITA?
Let's say that getting older doesn't help The real problem is that the furnaces changed size and don't exactly fit the old opening, requiring extra fiddling to get it in. Also, when the TT was originally built, the person installing the furnace did the install before the galley cabinetry was installed. THAT would have made the install a LOT easier!

A similar thing happened with the WH on ours: the opening had to be extended lower, and the gas supply re-routed to the other side of the WH. Once more, not a slip out/slide in situation.

I suppose one has to expect this when replacing thirty-odd year old appliances on a TT.

Look at it this way: you won't likely need to ever do that job again
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Old 12-23-2012, 08:52 AM   #8
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Out of curiosity, which size furnace did you get?
I got the NT30, replacing an NT22. Wouldn't have been my first choice, but the price was right.

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Yes, my experience exactly. I didn't have a flare tool to re-do the shortened gas supply pipe, and wound up buying a cheap cruddy one for $40 that just did not make the job any easier.
I had the flare tool already from the water heater. At least I got two uses out of it - but it seems like mine was more like $20 at HD...

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Let's say that getting older doesn't help The real problem is that the furnaces changed size and don't exactly fit the old opening, requiring extra fiddling to get it in. Also, when the TT was originally built, the person installing the furnace did the install before the galley cabinetry was installed. THAT would have made the install a LOT easier!
Same thing on the '78. And the cabinetry is essentially a slowly disintegrating tinkertoy set.
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A similar thing happened with the WH on ours: the opening had to be extended lower, and the gas supply re-routed to the other side of the WH. Once more, not a slip out/slide in situation.

I suppose one has to expect this when replacing thirty-odd year old appliances on a TT.

Look at it this way: you won't likely need to ever do that job again
I certainly hope so!!!
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Old 12-23-2012, 09:46 AM   #9
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Dang! I know I'm getting old,

Don
I know how you feel. I'm 73, it takes longer to do things on my trailer now. I have put off what you did with new heater, I'm using a portable electric, cause I'm "lazy". LOL
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Old 12-23-2012, 01:34 PM   #10
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I know how you feel. I'm 73, it takes longer to do things on my trailer now. I have put off what you did with new heater, I'm using a portable electric, cause I'm "lazy". LOL
Yeah, I'm 62. I'm also heavily conflicted, because I'm too lazy to do it myself, and I'm too cheap to pay to have it done!

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Old 12-23-2012, 08:32 PM   #11
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Yeah, I'm 62. I'm also heavily conflicted, because I'm too lazy to do it myself, and I'm too cheap to pay to have it done!

Common situation!
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Old 12-23-2012, 08:50 PM   #12
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Common situation!
Where do I sign up to join this lazy, old, cheap, guys club?
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Old 12-23-2012, 10:21 PM   #13
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Where do I sign up to join this lazy, old, cheap, guys club?
Can we add broke and old to the club membership?
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Old 12-23-2012, 10:32 PM   #14
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Can we add broke and old to the club membership?
Yep. Now I am old, broke, cheap, lazy, my heater doesn't work, it's raining and my trailer is leaking. Hmmm how did I get here? LOL
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