still looking to heat water but maybe from a different angle

[Dodgy Diver]

https://www.fruugo.co.uk/small-hous...pks50jLqeAdqXLhU3QMqH66QH3WCEKwxoCjXoQAvD_BwE

ambulances and similar have 2 alternators , what about fitting one of these to the boats engine . and using a small immersion element to heat water , I understand that the engine would need to be running and that its not feasible to do that whilst docked , but for a wash , shower I could always wait till driven for a hour to heat up a 12l tank ??

 

[simonfraser]

you could heat up a kettle or two and fill up a portable shower

 

[jrudge]

Why then the engine makes large volumes of hot water anyway?

It will also draw power from the engine.

 

[Dodgy Diver]

Why then the engine makes large volumes of hot water anyway?

It will also draw power from the engine.

I didn't think mine had a closed loop system . I have no radiator cap and no heat exchanger . im pretty sure it just uses the sea water to cool ...... but im also highly miss guided some times . so could be talking crap

its a 5.8l v8 cobra engine

 

[Dodgy Diver]

you could heat up a kettle or two and fill up a portable shower

the thing is that I find very odd is the boat has a fully fitted shower . but only cold water to it ,,what's the point of that

 

[QBhoy]

You could get a diesel water heater. Or if you have power or a portable generator…just get a combo hot water tank that has an element and fed off engine.

 

[Dodgy Diver]

You could get a diesel water heater. Or if you have power or a portable generator…just get a combo hot water tank that has an element and fed off engine.

its only a 23ft motor boat , so no 240v im afraid

 

[QBhoy]

its only a 23ft motor boat , so no 240v im afraid

Easily remedied perhaps. Just fit a ring main and a shore power socket. I had such a system in my sealine 218. Similar size. Great thing to have. Probably easier than the suggested ?

 

[Dodgy Diver]

im a commercial electrician , but the issue is that I won't have 240v available unless in port

 

[simonfraser]

the thing is that I find very odd is the boat has a fully fitted shower . but only cold water to it ,,what's the point of that

as in a seperate cubicle just to shower ?

 

[LittleSister]

I didn't think mine had a closed loop system . I have no radiator cap and no heat exchanger . im pretty sure it just uses the sea water to cool ...... but im also highly miss guided some times . so could be talking crap

its a 5.8l v8 cobra engine

You don't need 'closed loop' (indirect) cooling to heat a water tank. My boat is direct (seawater) cooled, with a much smaller engine than yours, and very satisfactorily heats a hot water supply via a calorifier.

Useful info about installing such a system on the excellent website of Vyv Cox (of this parish):
Calorifier installation

 

[QBhoy]

im a commercial electrician , but the issue is that I won't have 240v available unless in port

All you need is a generator. Much simpler than trying to make one perhaps.

 

[Dodgy Diver]

as in a seperate cubicle just to shower ?

shower and toilet area

 

[Seastoke]

shower and toilet area

Just about your240 , I saw a portable unit today with lion batteries you can charge at home or it comes with solar panels , it would TV games etc but not kettles , I could findinfo if you want.

 

[Dodgy Diver]

I doubt it would have the power to heat water , thanks tho

 

[Seastoke]

I doubt it would have the power to heat water , thanks tho

Gas kettle

 

[Dodgy Diver]

Gas kettle

not exactly viable to shower with

 

[burgundyben]

Why not a Hydronic and calorifier?

 

[waynes world]

have you got a diesel cabin heater like the cheapo chinese ones ?

 

[waynes world]

found it for you, spent ages to find this as forgot what they are called.

Bobil Air Xchange | Bobil Vans

the heaters are diesel air cheap so the two maybe £500 all in.