Good Old Boat magazine had an article within the last year or two of some folks on a boat without a water heater at all. They heated up a kettle of water and added it to a Sun-shower. Works for us.
Instantaneous gas heaters have a rotten reputation. Others can comment on this.
Another source is an Espar-type diesl fueld heater, used for cabin heating, that also makes hot water through your existing water heater. I do not know if there is a way to turn off the cabin heating to just make hot water.
Or just switch your routine.
Instantaneous gas heaters have a rotten reputation. Others can comment on this.
Another source is an Espar-type diesl fueld heater, used for cabin heating, that also makes hot water through your existing water heater. I do not know if there is a way to turn off the cabin heating to just make hot water.
Or just switch your routine.