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Go Back   SailNet Community > On Board > Gear & Maintenance > need hot water heater
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Topic Review (Newest First)
01-15-2011 12:57 AM
twisted23 i guess there isnt a good solution , looks like i am going to use a small tank style heater.. thanks ...Ron
01-12-2011 03:26 PM
ffiill Propane safety-if you have a gas sniffer installed and mine has two sensors its impossible to get any gas from storage locker as without power the gas solenoid is shut.Plus you get a very noisy siren blasting off.
So you remove gas supply if portable;and start pumping bilge with your manual bilge pump to pump any gas overboard.
Whilst propane gas explosions do occur its not just as simple as gas plus a match.Mixture has to be just right.
Having said all of this my boat has a calorifier running off the indirect engine cooling system.
Once the engine is up to operating temp a little below boiling point so the 8 gallon calorifier is at the same temp.After a run into harbour mine is quite capable of giving several hot showers plus enough water to wash pots and have a warm wash the next morning.
It has the facility to add an immersion heater/heating coil for shore power although I have never found the need as if its available a nice shower onshore always seems more appealing.
01-12-2011 01:22 PM
mitiempo I guess that would depend how large your tank is and if you cared about being frugal with your supply or not. I have a 27' boat and my galley sink has a small Flojet pump rated at 1 gpm. But I am not looking for a water heater - of any kind.
01-12-2011 12:41 PM
deniseO30 Brian... the specs on precision.. 2 gal a minute is a trickle imho

Capacity:

55,000 Btu input - 44,000 Btu output at maximum burn at 8.5 WCI manifold pressure.

15,000 Btu input - 10,600 Btu output at low burn at 1.2 WCI manifold pressure.

(88°F temperature rise per gallon per minute continuous flow at high burn).
Fuel Consumption: 2.55 lbs per hour at maximum input. ( At 2 GPM of water, 20 lbs of propane will produce over 940 gallons of hot water).
01-12-2011 12:24 PM
boatpoker
Quote:
Originally Posted by SanDiegoChip View Post
We have friends on two different sail boats that have propane hot water heaters. They like them a lot. They are installed in the engine room. They have CC 41’ sail boats here in the states. We asked our insurance company if it would be OK and they sail only if we mounted it on the rail (or such a place). So that is the rub. Nice hot water and no insurance or well maybe when we go cruising we will not be able to afford insurance so .. well propane hot water heater
They are popular in Europe I hear.

Chip
Propane in an engine room.........BOOM !
01-11-2011 10:54 PM
deniseO30 I sell and we install Quietside on demand units, Only one that uses pvc venting that I know of. Not Marine rated of course.
120 volt on demand WHs, would only be good for sink use, dishes, tea or coffee. very small input at 1500 watts there abouts. I don't think would be able to supply continuous flow for showers.
01-11-2011 08:25 PM
mitiempo As far as I know all the common makes in North America do not have closed combustion chambers, Paloma, Bosch, Excel among them. I did see one that had a closed combustion chamber as an option.
PrecisionTemp.com: For Recreational Vehicles and Boats
01-11-2011 03:49 PM
ffiill Actually its quite common practise to see yachts in the uk fitted with balanced flue instant hot water heaters-for those with a scooped stern with bathing platform outlet is often here.
A balaned flue is where air is taken in through an outer jacket surrounding the inner flue pipe and combustion takes place in a combustion chamber completely sealed from interior of boat.
On caravans and RVs its easier .You can also get ones that take air from inside and flue vent overboard but are problematic /illegal on new builds.
When my boat was built 30 years ago it had one of those instant gas gesers which vented into the cabin-totally no go these days.
01-11-2011 02:31 PM
mitiempo They are popular in Europe - but in homes, not boats.
01-11-2011 01:23 PM
SanDiegoChip We have friends on two different sail boats that have propane hot water heaters. They like them a lot. They are installed in the engine room. They have CC 41’ sail boats here in the states. We asked our insurance company if it would be OK and they sail only if we mounted it on the rail (or such a place). So that is the rub. Nice hot water and no insurance or well maybe when we go cruising we will not be able to afford insurance so .. well propane hot water heater
They are popular in Europe I hear.

Chip
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