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  #1  
Old 04-19-2010, 05:48 PM
brulaz
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Default Elkmont furnace ducting

http://picasaweb.google.ca/bruce.laz...eat=directlink

I've added some new photos to the end of our Elkmont album showing changes made to the furnace ducting. The Suburban NT-20SE furnace is supposed to have a large rectangular main vent into the living area. There is one 4" round cut out that can additionally be used. For some reason, Trailmanor capped the end where the main vent is supposed to be and forced all heated air out the 4" vent on the side. They then forked this small duct to the living room and bathroom.

One of the first things we noticed about our Elkmont was that it wasn't heating the living area very well. So I added a regular household floor vent to the front of the furnace. There was some Al sheet metal screwed in and taped with Al duct tape around the front of the furnace so that the ~4"x9" vent fit well with no hot air loss. We could have used a larger vent but we wanted a balance between air going to the bathroom and the living area. A little testing indicated that a ~4"x9" was about right. All the 4" round corrugated ducting was replaced with smooth Al tubing and angles, insulated. The tee was removed so the furnace's 4" side port now only feeds the bathroom, and the original 4" round living room port is just ornamental.

And I put a 1/2" piece of plywood under the furnace and screwed it to the floor. Originally I thought the furnace had been screwed in, but it had just been jammed up tightly against the front partition.

There's a lot more hot air coming out into the living area now. The balance between the bathroom and living area is about right, but we can adjust the living area vent to force more air into the bathroom if wanted. And we can now see the flames in the inspection window and remove the 4x9 vent to have access to the burner.

The air circulation in the trailer was improved (I think) by increasing the return flow from the bedroom by replacing the small 4" round duct there with a much larger household return vent. But there's still big gaps under the setee through which hot air can return. I'm not sure what to do about that. Maybe some baffles can be installed, but the setee does have to pull out so it can be made into a bed. We'll see.

That's about it for now. My ToDo list has shrunk to just a couple minor items. All the major stuff has been done ... hopefully. I'm really looking forward to taking this thing out on the road again. Our next big trip will be to the Gaspe Pennisula, Quebec, Prince Edward Island and Cape Breton, Nova Scotia early June. With maybe a couple of short trips before just to make sure things are working as they should.
  #2  
Old 04-19-2010, 08:34 PM
harveyrv
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You're doing a nice job on my future trailer....

Keep up the good work....
  #3  
Old 04-20-2010, 06:52 AM
brulaz
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Persistence is a virtue ... usually!

Last edited by brulaz; 04-20-2010 at 06:54 AM.
  #4  
Old 04-20-2010, 08:37 AM
Beak12
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Quote:
Originally Posted by brulaz View Post
Persistence is a virtue ... usually!
You plan on going to any southern CA rallys? Sure would like to see this change.

Last edited by Beak12; 04-20-2010 at 08:40 AM. Reason: posted too soon
  #5  
Old 04-20-2010, 04:26 PM
brulaz
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Quote:
Originally Posted by John Wahlsten View Post
You plan on going to any southern CA rallys? Sure would like to see this change.
I would love to, but So Cal is a long ways away. We'll have it in Florida this winter ... but I guess people from So Cal don't go to Florida in the winter.

We were tent camping in the New Mexico Rockies last year and loved it. Except for the last day's thunderstorm which prompted our Elkmont purchase. Maybe next year we'll go back? And I guess the Sierra Nevadas are not too far from there...

But, realistically, I can take more pictures if you want. Although it would have been better if I took some while things were torn apart.
  #6  
Old 04-20-2010, 09:05 PM
Beak12
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But, realistically, I can take more pictures if you want.

Thanks, but it would be fun to see this in person. We hope to be in Bufalo NY in Aug. At a place called Chautauqua.
  #7  
Old 04-21-2010, 07:34 AM
brulaz
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Well, lets keep in touch. We're about 300km (~180miles) north of Buffalo. But my daughter wants us to move her to the West Coast late in August ...
 


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