I'm thinking of switching to a tankless water heater to do away with my oil burner. I am wondering if I can use a seperate tankless to heat my house.
It may, indeed, be possible, but I'd have to think that a regular gas fired hot water boiler would be much more efficient. Hot water heat has to be circulated constantly and that would make an astronomical gas bill. The heater would run all the while water was flowing through it.
I know if you use a normal tankless with a circulator pump, which I think you'd need to do, it voids the warranty on some of the parts (like heat exchanger).
