If you don't mind my asking, what did your system cost?

Also, what are the climate conditions where you live, how cold in the winter, how warm in the summer?

My system was very expensive to install, but most of the expense was labor since it was replacing impossibly costly to operate electric baseboard heat, which meant that they had to knock holes through walls and floors/ceilings, and install many hundreds of feet of copper pipe, make more holes to run the wiring for the thermostats, etc. All of this in a 20-year-old house while people were living in it. Ugly... And that Buderas furnace wasn't cheap, either. But there really was no option. Had I continued with electric resistance heating, the house would have been literally unsalable. I saw the real estate crisis coming and knew I had to get out before the crash, and in Alaska nobody would even look at an electrically heated house.

My installation, parts, labor, and repair of demolition required for running the pipes came to about $23,000.

tanstaafl.