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Old 02-10-2021, 08:04 AM   #1
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A Heating Alternative?

Hello,

While surfing the web this morning an interesting heater came to
my attention. It was a simple, inexpensive DIY device being used on
a sailboat that looks like it would be useful in a small trailer.

The old gravity furnace in my Trillium is heavy, takes up a lot of
space, and about roasts me out of the rig in five minutes.
Perhaps this thing might be a viable alternative?

https://goodoldboat.com/diy-sailboat-cabin-heater/

Uncle Larry
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Old 02-10-2021, 09:03 AM   #2
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all that work take a look at wave heaters on amazon! they are cheap they work i have never used the furnace in our Scamp!


of course to head off complaints you must vent but if you look around in a travel trailer for the most part its pre vented!
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Old 02-10-2021, 09:22 AM   #3
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Almost any appliance you can find that was built for sailboats will be a massive improvement over anything you find built for RVs.
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Old 02-10-2021, 11:08 AM   #4
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WORK!?!? ( M G Krebs)

Yo, Bob,

"all that work" ?

Work is a relative term. Building and experimenting with
gadgets can be very satisfying.

While camping in the Trillium installed my solar electric system
using a cordless drill, hack saw, a 12VDC powered soldering
iron, and assorted hand tools... The panel legs were made
out of some parts from discarded crutches. The cable from
the panel to the trailer is a heavy duty extension cord.
Of course there was a road trip to a home center for
parts. Lotsa fun and very satisfying.. The system is still
working fine 7 years later.

I like catalytic heaters and have a Wave 8 for emergencies
at home....

Hmmmm.... looking at the stock pot stove top heater I imagine
some heat sink like fins rivited to the inside and outside of the
stock pot to increase its effeciency...

Uncle Larry
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Old 02-10-2021, 12:45 PM   #5
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Quote:
Originally Posted by Larry C Hanson View Post
Hmmmm.... looking at the stock pot stove top heater I imagine
some heat sink like fins rivited to the inside and outside of the
stock pot to increase its effeciency...
Maybe something like this:
https://www.mec.ca/en/product/1699-6...t?colour=NOC02
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Old 02-10-2021, 03:15 PM   #6
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Looks to me like the bulk of the heat is ported outside. There is noway I would use this thing.
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Old 02-11-2021, 09:13 AM   #7
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So if I understand this correctly, it’s a device that covers a standard stove burner and vents the exhaust gasses outside? It requires a pretty good-sized hole in the roof with a flashing? It draws combustion air from the cabin, so continuous ventilation must be maintained? It isn’t fully sealed, so there’s a small possibility of exhaust gasses getting into the cabin?

Personally I’m not comfortable with any fuel-burning heating system that’s not fully sealed from the cabin, both intake and exhaust.
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Old 02-11-2021, 10:37 AM   #8
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Ha ha I knew this crazy contraption would draw curiosity.
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Old 02-11-2021, 11:15 AM   #9
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Me, Im thinking this thing is not for heating a boat but rather to port the heat outside to keep it from getting to hot inside.
And in a rocking boat, even whed tied up to the dock, would be impossible to keep it in place. Thinking it was designed by Murphey.
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Old 02-11-2021, 11:15 AM   #10
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We just fire up the propane burners and make coffee to heat up our camper. Heats the cabin nicely!
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Old 02-11-2021, 11:17 AM   #11
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i think i will spend extra time camping traveling!
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Old 02-11-2021, 11:47 AM   #12
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It's a different version of this old idea that many have used on boats. The clay pot is much simpler.
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Old 02-11-2021, 11:57 AM   #13
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yep!!!
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Old 02-11-2021, 11:57 AM   #14
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It's a different version of this old idea that many have used on boats. The clay pot is much simpler.

Simpler, but inefficient and dangerous. What else does it have going for it?
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Old 02-11-2021, 01:03 PM   #15
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Simpler, but inefficient and dangerous. What else does it have going for it?
I never could figure out why this was a popular idea. It doesn't add anymore heat to the room than an open flame, and it vents all the combustion gasses into the room.

Some have used oil lamps to do the same thing.

A standard 6 gallon water heater can pretty easily have a space heater added to it that is perfectly safe, and even works with a thermostat. A simple fan convector with a 12 volt circulator can be teed into the hot and cold lines for this. With that, one can get good heat and sleep safely.
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Old 02-11-2021, 03:03 PM   #16
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A standard 6 gallon water heater can pretty easily have a space heater added to it that is perfectly safe, and even works with a thermostat. A simple fan convector with a 12 volt circulator can be teed into the hot and cold lines for this. With that, one can get good heat and sleep safely.
I sure would like to see Dometic or other water heater manufacturer sell an economical kit for converting the water heater into a combination water heater and hydronic furnace. The only combination units currently available such as the Truma Combi and the Aquahot are very expensive.
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Old 02-11-2021, 07:20 PM   #17
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John, Here are the basic components to make it work. A fan convector for about $140. and a 12 volt pump. A simple room thermostat can be added in series with the 12 volt supply and it's done. This is slightly oversimplified, but it shows the idea and the size of the stuff needed. There may be a better convector somewhere, but this one has copper piping so one could run the domestic water through it. The pump is the one I'm using for my instant hot water recirc line. Plenty of flow for heating. The whole thing with thermostat could be done for less than $200. It could mount behind a kickspace, in the bottom of a closet or under the bed, and blow hot into the room. PEX or copper lines can Tee into the hot and cold on the water heater. The convectors come in all sizes and shapes, and some have thermostatic switches in them that would simplify the installation further.

https://www.amazon.com/Underdash-Uni...82PH99N5&psc=1


https://www.amazon.com/bayite-BYT-7A...sr=1-3-catcorr
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Old 02-11-2021, 07:46 PM   #18
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So lets talk about using soapstones on the stove...
On second thought, it might be safer to talk about the impeachment trial now going on (PLEASE dont!).
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Old 02-11-2021, 08:22 PM   #19
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John, Here are the basic components to make it work. A fan convector for about $140. and a 12 volt pump. A simple room thermostat can be added in series with the 12 volt supply and it's done.
That's pretty neat. Friend of mine is experimenting with this idea in his Scamp, however, but I don't think he is using a prefab fan convector. The prefab fan convector would definitely make it easier to build. Last I checked, he was redesigning his experiment to get more heat out.
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Old 02-11-2021, 08:44 PM   #20
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Better boat heater alternative??

Here's another boat heater, but its propane fueled. The Dickinson Cozy Cabin propane heater. It has a one inch flexible metal flue and a thermocouple to shut off fuel if the flame goes out. It has adjustable heat but no thermostat.

https://www.defender.com/product.jsp?id=48912#
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