Gary, I think you mis-read Fran. The 4.5k unit is just an emergency backup. As he said, my house is all-electric and that includes three large HVAC units with the largest unit also zoned to a heated garage. The house is super insulated so heating and AC is fairly reasonable; also I don't have any kids running in and out so once at temp, the units run very little. However, I'm a creature of overkill, so I've got a lot of stuff that burns a lot of juice . Mainly, I wanted a system that would easily run all the systems at once. I have whole-house on-demand hot water but also a single point on-demand in the kitchen.

Oh, and yes, I intend to sell and move into a townhouse. It would be an apartment or condo if not for my musical toys.

chas