Options for hot water

Wiring your boat, How to Wire Lights/Accessories, All things electrical other than actually powering your boat by electric motors.

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Scot2640
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Options for hot water

Postby Scot2640 » Thu Aug 04, 2016 8:10 pm

I'm a new guy so apologize for this probably dumb question.

In the larger cruiser designs I see that the shower is often integrated with the head. How do you make hot water on a boat? I envision/dream of a time when I'll be cruising with extended periods at sea and would like to be able to have a hot shower. Is this kind of thing a dream on a cruising style boat under 30 feet?
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specialk
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Re: Options for hot water

Postby specialk » Fri Aug 05, 2016 6:26 am

Scott .. I just saw this... I think one option... Google Propane Reddy hot... I think this would work... we have one we take camping...!
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Re: Options for hot water

Postby Bill Edmundson » Fri Aug 05, 2016 10:58 am

Scott

This my heater. I think this is the same one Ray M. has. It's 6 gal. runs one 110V. If your running an inboard, you can heat it from that. A 2KW generator or shore power will run it also. If you run off the 2kw, you will have to do some power management. You can't heat water, cook and run a hair drier at the same time.

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Scot2640
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Re: Options for hot water

Postby Scot2640 » Fri Aug 05, 2016 12:19 pm

Thanks guys, makes sense.

Understandably there are power limitations but for the occasional shower that's ok with me.

Appreciate the help.
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psychobilly
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Re: Options for hot water

Postby psychobilly » Fri Aug 05, 2016 2:44 pm

If you're running an inboard, there's this option.

http://www.skidim.com/AQUATIK-SHOWER/pr ... 1%2DS%2DC/

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Re: Options for hot water

Postby Scot2640 » Fri Aug 05, 2016 7:35 pm

Thanks billy, that's a good one to.

It leads me to my next question further illustrating my depths of ignorance. How do you get water pressure with the smaller 6 gallon style hot water heater? I'm guessing a pump of some kind. I assume that pump would also play a roll in the cold water supply in the gallery and the head.

I have taken so much for granted in a regular home. When truly off the grid, considerations have to be made for every seemingly simple system. I'm really enjoying the planning and learning.
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Re: Options for hot water

Postby raymacke » Sat Aug 06, 2016 6:06 am

A small 12v pump in installed in the water line that comes out of the water tank. Anything downstream of the pump is then pressurized. Since the water heater is supplied water from this line it too is pressurized by the single pump. These pumps run and build pressure to a preset limit and then shut off until there is a demand. They have a built in check valve so the tank does not become pressurized. They are also self priming so can be located higher than the tank.

Here is a link to the one I have installed but there are many available as they are commonly used in RVs.

https://www.amazon.com/gp/product/B00W5 ... UTF8&psc=1
Last edited by raymacke on Sat Aug 06, 2016 6:14 am, edited 1 time in total.
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Bill Edmundson
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Re: Options for hot water

Postby Bill Edmundson » Sat Aug 06, 2016 6:11 am

Scot

You come out of your storage tank to a pressure controlled pump. From the pump you split the line with one leg going to cold water and one leg to the water heater. The hot leg from the heater is slit to go wherever you want. One pump serves both.

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gap998
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Re: Options for hot water

Postby gap998 » Sat Aug 06, 2016 6:10 pm

On the narrow-boats I've hired here in the UK, the hot water is provided by a calorifier linked to the Engine closed cooling system, so the water is heated as you cruise. There is also an Eberspächer diesel heater which runs the central heating that can heat the water when moored without the engine running
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