Thanks Dura. I'm sure I'm showing my lack of knowledge on this subject by using the term furnace where I should be saying boiler. Right now I have straight forced hot air (furnace), and a elec. hot water heater. I'm thinking I might want to go with a system that would enable me to do forced hot air, but also be able to do my hot water, and possibly a zone or two of BB heat (boiler?) With this type of system, if its possible, I figured I could get a airhandler that would be able to have cooling coils in it and solve my central a.c.(lack of) problem as well(would need condenser outside, I know). This would probably be some sort of hydro air system right?