Hi all-Does anyone know where I can access a hot water tank(heat exchanged calorfier) which plumbs into the cooling water circuit of the inboard engine.Northshore yachts and others used these and were an effective way of having hot water onboard.They would hold about 15-20 litres in total.
I am building a small Tug and this will help me out greatly.Cheers.
Google "marine water heater" should get you a few thousand hits including this:
www.whitworths.com.au/kuuma-24-litre-water-heater-front-back-mounting
Thanks.To be more specific,I am looking for a pure heat exchanger type with heat gained from the motor alone.All the ones I have 'trawled' on the net are mostly electric or a combination suited to the bigger motor boats with onboard gensets and cost a packet.
Regards CR.
i dont know of any that are raw water heated myself, but the one i had on board was able to be heated both by engine and 240v. very efficient off the motor. held 20 litres. cant find them now though.
Mine cost $750 it is the isotherm brand installed it 6 years ago after 1.5 years the 240volt element blew up..... Cost me $350 for a replacement. It's basically just a 20ltr keg with copper coil for the engine take and a 240volt kettle element running on a thermostat.
Thanks guys-Could be in the too hard basket! I just wanted to purchase a simple HW tank system for the Tugboat as installed in our yacht without the 240v elements etc,which as you mention is quite efficient just off the motor.
We are not intending to have shore power fitted and don't want to 'junk' it up with too much gear,but having hot water is a nice luxury for a cockpit shower etc.
CoolRunnings; My yacht has a heat exchange only HWS, works well only takes 20 mins to heater up to a point you need to add cold water to shower under.
The tank is about 15-20lts
I 'll check on the weekend to see if I can get a brand name off the tank.
I use a Companion Aqua Cube for a hot cockpit shower (got from BCF $160). Simple to use; conects to LPG Gas bottle and drop pump unit in a bucket. Comes complete with protective carry bag. There is some youtube clips of these in operation. Coleman also make a similar product.
Coolrunnings no luck with a brand name, it looks like it's been made to suit the location.
You should be able to make your own see photo; line in and out to the heat exchange and a cold water in and ( after heating) hot water out.
I guess there must be a coil inside the SS tank that the water coming from the heat exchange runs through to heat the cold water.
Thanks Seabird in going to the trouble of taking a pic in my quest to find something.It's the type I'm looking for and looks very similar to the one fitted in our NS33.
Little Jon's referral on the Glind unit is a good lead and for not a lot of money either.You just have to keep the engine running as it is a non storage system and will go that way now. I do not think anyone can make me a tank with an inbuilt coil for around $250.00.I am not that talented to try and make one myself !
My thanks to all involved on this topic-Cheers C.R.
