With a grin on my face, and no insult
intended, I will say this.
SteveRF, I grew up in the midwest. Our idea
of Geothermal heat pumps are cattle.
If you put 3 1/2 tons of those heat pumps in
your living room, no x10 device in the world
is going to be able to accurately control
them.
My use is much more simple. Turning
electrical heating units on and off and
activating exhaust fans.
Have a good day,
Ken