Water tank / Furnace questions (!)

[RobertInOntario]

" Thanks! So you're using a combo unit, i.e. a water heater that also heats your house (in conjunction with an air handler)? "

No Air Handler, it was convection heating. The only time we needed "air movement " was in the summer, and that was taken care of by opening the windows, and letting the ocean breeze blow through.

My parents sold the house years ago ( taxes were getting too high ), and it has been doubled ( at the least ) in size, not sure how the "extension" is heated.

Thanks... but you were, at least, using a combo unit / water tank to heat your house (Instead of a conventional furnace)?

This is what our contractor is advising and I understand it's very energy efficient & green. Almost ready to take the plunge with this!