Water tank / Furnace questions (!)

[RobertInOntario]

Circulated hot water, baseboard heating ( copper pipe with aluminum fins to radiate the heat ). It's your heat, and hot water both. The boiler we had was not all that different from a standard hot water heater, and the system kept the house warm all winter. We also had the option of stoking up the fireplace.......we got heat, and as the fire burned down we could "toast" a few marshmallows.
It helped that the walls, and ceilings, were fully insulated.

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