I have been looking into getting an on-demand hot water heater; but in talking with some local plumbers they are leary of them. Main reason is costs, a good on-demand cost up to $1700 compared to a $700 regular system. Another issue is that they need special ducting for their chimney. A couple of plumber I talked to said the life expectancy of an on-demand is about 1/3 to 1/2 of a normal water heater.
Where our cabin is located we would have to completly drain the system to winterize, and the on-demands seem to have a certain amount of water that cannot be drained.
Anyone have any thoughts on this.