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Old 05-19-2014, 01:20 PM   #21
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Thanks for the heads up, I'll keep my eye on it. What are the signs that it's needing replacement, leaking, not heating?
Our Seaward worked great too, even after it started leaking brown cruddy water out the base. If you are contemplating a long cruise to foreign places, change it out. Finding a NA rated electric heater in Europe or SA is not easy. The later year Nordhavns I've been on seem to have gone with Raritan heaters and according to the spec sheet I have in front of me.
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Old 05-19-2014, 01:25 PM   #22
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Our Seaward worked great too, even after it started leaking brown cruddy water out the base. If you are contemplating a long cruise to foreign places, change it out. Finding a NA rated electric heater in Europe or SA is not easy. The later year Nordhavns I've been on seem to have gone with Raritan heaters and according to the spec sheet I have in front of me.

Yeah in the future when it needs replacing we'll more then likely go with a Raritan since they are local to us, also I believe Lewis Marine carries them.
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Old 05-20-2014, 07:10 AM   #23
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ON our boat we have a small electric circ pump that is for the box heater feed.

In cool evenings after shut down we run the circ pump and box heater fan on low and can enjoy a couple of hours of >free< heat .

This could easily be done for a HW heater , a 3000lb engine at 180F has a lot of BTU ready for the taking.
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Old 05-20-2014, 07:27 AM   #24
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Getting rid of a Torrid (not leaking) after 16 years. Have changed the anode every five years. Just a preventive measure. Our location would make replacement during season expensive with a three week time delay.
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Old 05-20-2014, 12:56 PM   #25
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Anyone have experience with Solaris water heaters. They are expensive but the copper tank is interesting.
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Old 05-20-2014, 07:06 PM   #26
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Hot water heater recommendations
Why would you want to heat hot water?
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Old 05-20-2014, 07:15 PM   #27
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Thanks Ron! Pet peeve of mine too.

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Old 05-20-2014, 10:25 PM   #28
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Thanks Ron! Pet peeve of mine too.

Rob
Google cold water heater and see what you get, pet peeves aside.
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Old 05-21-2014, 12:15 AM   #29
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To save the pedantic ones , use Hot water systems.

I recently got rid of my gas hot water system and replaced it with a Force 10 (Kuuma) 45 lt (10 gal) 1500 watt, 240 v unit. I am more than pleased.
I don't use the engine heating as gen set time makes more than enough hot water for us and when we are motoring I have a 5 KVA cruise alternator to supply the power.

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Old 05-21-2014, 08:54 AM   #30
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Ron, it may very well be your pinch point but these units are called hot water heaters. When discussing circulating or creating hot water I see nothing wrong in using the term hot water heater...
Would you prefer hot water creation devices?
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Old 05-21-2014, 09:56 AM   #31
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I and many others just use cheap Home Depot type domestic water heaters. No option for engine heat recovery, but in my case gen has to run a few times a day for other reasons so it is not a big deal missing that. Also easy to access should it need replacement. Bottom supported on thin wood strips so if water gets under unit, it can air dry to minimize rust. 7yrs, looks and works like new. I think the tank is glass coated.
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Old 05-21-2014, 10:22 AM   #32
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I and many others just use cheap Home Depot type domestic water heaters. No option for engine heat recovery, but in my case gen has to run a few times a day for other reasons so it is not a big deal missing that. Also easy to access should it need replacement. Bottom supported on thin wood strips so if water gets under unit, it can air dry to minimize rust. 7yrs, looks and works like new. I think the tank is glass coated.
I didn't know Home Depot made 110VAC water heaters. So as long as you are not (Ethanol) gas powered ignition protection isn't needed? Even though I'm new to diesels I prefer using IP certified devices on my boat.
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Old 05-21-2014, 11:25 AM   #33
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It's a "water heater". more specifically, a "domestic water heater". Some people may call them hot water heaters but that doesn't make it right. As I posted, why would you want to heat hot water?
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Old 05-21-2014, 11:32 AM   #34
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Are we really going De-rail a good thread because someone has a pet peeve?
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Old 05-21-2014, 11:45 AM   #35
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It's a "water heater". more specifically, a "domestic water heater". Some people may call them hot water heaters but that doesn't make it right. As I posted, why would you want to heat hot water?
Hot or warm water heats faster than cold water.
No thread derail just opinions?
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Old 05-21-2014, 11:52 AM   #36
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I didn't know Home Depot made 110VAC water heaters. So as long as you are not (Ethanol) gas powered ignition protection isn't needed? Even though I'm new to diesels I prefer using IP certified devices on my boat.
Thanks,
Bill
Lots of things in your engine room are already not IP such as alternator, starter, various switches and motors. IP not required for diesel boats. I would not worry about the water heater thermostat.

Even if the heater you want comes with a 220v element, elements can be changed to 110v. Little water heaters are often 110v off the shelf. HD usually has a bunch of replacement elements off the shelf too.
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Old 05-21-2014, 05:10 PM   #37
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Are we really going De-rail a good thread because someone has a pet peeve?
All I did was ask a simple question.
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Old 05-22-2014, 06:21 AM   #38
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One option that might be used is a Home Cheapo 240v hearer that is modified.

IF the heater has space for 2 heating elements , if one is 120V , the other can have a DC heating element.

The wind screamer folks sometimes have excess energy , that could easily be dumped into making hot water.

Most DC elements are only 50w or 100W so for some folks with big solar it could also be an option.

Our boat lives without a power hose , and usually when I check even at 9AM the batts are back at float , so another 10 hours might make enough HW for modest tasks.
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Old 05-22-2014, 07:54 AM   #39
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My idea for heating water via solar includes a pair of water or anti-freeze filled panels (collectors) with a circulation pump heating the closed side of the water heater. This should provide a higher degree of efficiency than just dumping excess electric be it solar or wind into a 12VDC water heater dump load.
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Old 05-22-2014, 07:56 AM   #40
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A marine water heater with a heat exchanger is the best option unless the boat runs a genset 24/7. A couple hours cruising provides "free" hot water. No need to run a genset for twenty minutes just to take a shower or wash the dishes.

And of course, not every boat has a genset.
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