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  #1  
Old 03-26-2007
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Propane Hot Water Heaters

I am thinking about getting a tankless propane hot water heater for the boat. A couple of our members have a "Paloma 5 Propane Hot water Heater". Anybody have any opinions or recommendations on this type of heater? Unfortunately my engine is strictly raw water cooled with no heat exchanger.
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Old 03-26-2007
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We have a Bosch (Junkers) brand on demand propane water heater and absolutely love it. make sure you follow all the ABYS requirements during installation.
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Old 03-26-2007
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Why do people call these hot water heaters? Hot water doesn't have to be heated. It's a cold water heater.
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Old 03-26-2007
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For the same reason we park in the driveway and drive on the parkway: To confuse alien invaders and illegal immigrants.

Ron, they are absolutely great. The early ones (20 years ago) were problematic because when vented improperly they could give off enough carbon monoxide to kill you while you were showering. Look for one with CO detection (or get that anyway) and make Real Damn Sure you follow the instructions for ventilation. "Proper" marine ventilation probably will mean that both the intake and exhaust are outside the boat and you may have to run some ductwork to get them installed properly.

Outside of the US, a very big piece of the world market for home hot water heaters has been using these for a long time now. The technology (including installation precautions mainly) is way better than what scared sailors 20 years ago.
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Old 03-26-2007
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These things do make a lot of sense for home and anywhere else- far more efficient use of energy for sure.

The major caution is to make sure that your insurance carrier is willing to cover them - they can be safe but some insurers may still simply reject them.
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Old 03-26-2007
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And check out Practical Sailor. There are some issues with some units about burners staying lit when it is breezy. And ABSOLUTELY follow all recommendations about installation. When they were first introduced for marine use they got a bad reputation largely because of installation issues.
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IIRC the surviving "marine" units now have thermal cutoffs for that reason, so that if the burner goes out they cut off the gas. Something home stoves had for a long long time.
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Old 03-26-2007
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Hellosailor-

I haven't seen any home stoves that have a thermocouple shutoff for gas flow. Can you point out a model or two???
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Old 03-27-2007
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Ronbye,
Here is a link to one that I was considering.... http://www.excelonlinestore.com/serv...ces/Categories
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Old 03-27-2007
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Thanks everyone, For the price, I may opt to buy a new Excel Hot water heater as opposed to a used one. I like the idea of not having a separate exhaust flue.
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