I just "Binged" that house and while i don't know how old the photos are there are quite a few very large homes under construction in that area.
Does the roof have a stick frame or are they also concrete block...also, how is the R-value of the insulation??? Do you still need seperate insulation between the outside walls and the inside dry wall???
The house uses infloor radiant heat, there is a secondary backup system that is forced air that utilizes the central air system