"Bob" wrote in message
...
Geothermal heat pump.


Have they gotten more cost effective? After geothermal, a good solar system
but that depends on how much sun you get too. In any case, the system should
have backup if power lines are down or it would not be so state of the art.

In addition to a good heating system, I'd want state of the art construction
for maximum thermal efficiency using something like ICFs (insulating
concrete forms) www.polysteel.com or www.integraspec.com