In the diesel engine forum I've been bemoaning the fact that our engine stubbornly refuses to produce enough heat to make an heat exchanger do its thing. Ergo I've been looking at options.
Bosch (for one) manufacture an instant gas hot water heater which has AGL approval for installation in boats but to my mind is problematic. For one they suck up oxygen at an alarming rate meaning that ventilation is crucial and installing one in a head compartment is fiddly to say the least. They also of course have to be mounted on a bulkhead taking up space in an already crowded compartment. Also, in the case of the Womboat, there is no suitable place to install in the galley.
I did look at a 12v electrical heater a year or so back but the thing simply sucks up too much juice to make it acceptable on a sailing boat. I like it because it took up little space and didn't require heat exchanger (optional) or mains voltage which we do not have access to.
Enter the Truma B14.
Truma - Boat boiler for hot water while offshore
LPG powered (a mains voltage booster is an option), fully approved and at 14 litres is small enough to fit into the limited cockpit locker space we have available. Takes about half an hour to heat up from cold using 120g/h whatever that means though my gas fitter reckons that is pretty good.
We are not concerned by the relatively small capacity. All we are after is hot water for a couple of navy showers a day and any left over will be used for washing up. Gas will not be left turned on permanently, we'll turn it on at bottle, heat water, turn off, just as we do with our stove. We also have a pressure gauge on our gas line that detects any gas leaks. No need to run engine even if that was doing its job temperature wise.
Thoughts anyone ?