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Old 11-29-2020, 11:54 AM   #1
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Diesel heater

Hi I installed a diesel heater in my motorhome in the space where the propane heater had been. Most of the exhaust pipe is still in the space. Can I and should I wrap it with exhaust wrap to keep it from getting to hot and catching my home on fire?
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Old 11-29-2020, 01:32 PM   #2
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Definitely, if the surround for that space includes any flammable material as the exhaust gets verry hot. Also, assuming that the space is within the cabin, be sure no leak at the exhaust connections. In my case, I was able to install the body of the heater against an outside surface so that the exhaust connection was outside the cabin environment.

Since you did a replacement, did you pipe the heat direct into the cabin or into the existing ducts?
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Old 11-29-2020, 02:40 PM   #3
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Is it one of these Wabasto heaters? If so, be sure to keep the exhaust flex pipe away from anything that will burn.

These are the onws we used to instal in trucks so the truckers didn't need to run the engine for heat at night in the sleepers. They work great, and use very little power.

https://www.amazon.com/Webasto-2000-...55814&hydadcr=
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Old 11-30-2020, 07:34 AM   #4
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Thank you. I am trying to go through the ducts. Haven’t quite figured it out yet. I saw a YouTube video that said if I wrap the exhaust it could cause stress cracks in the pipe. I also lined most of the space with foil tape. The heater itself is also in the space.
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Old 11-30-2020, 07:37 AM   #5
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No it’s a cheap chinese heater.
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Old 11-30-2020, 07:42 AM   #6
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I installed diesel heater in my boat. It was a Walles brand and had a double pipe for intake and exhaust air.

The outer flex pipe never got to hot to easly hold with your hand. It made contact with a wood seat back and was fine.
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Old 11-30-2020, 03:18 PM   #7
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Quote:
Originally Posted by Denny63 View Post
... I am trying to go through the ducts. Havenít quite figured it out yet.
Replacing the original furnace, are you thinking to make an adapter to the existing plenum? In my case, it was an addition to the existing furnace, so I T'd into the existing duct downstream of the furnace. FYI, I had to up the fan speed of the DAH to 5000 rpm to push the air to furthest outlets. Even then, it is sooo much quieter than the furnace and does not wake us up during the night while using less power!!

Quote:
I saw a YouTube video that said if I wrap the exhaust it could cause stress cracks in the pipe. I also lined most of the space with foil tape. The heater itself is also in the space.
Stress cracks sound bad, however there are many examples of wrapped exhaust in the Facebook forums. If you don't go for the wrap, just be sure the surround is well protected from the pipe, maybe multiple layers where it's close to a wall. Enjoy the quieter heat.
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