[turbo6bar]

Wish I could, but the humidity in Tennessee is brutal. The added load from humidity control would negate some/most/all of the benefit of the whole house fans.

I'm going to bug a few local vendors this week re: spray foam insulation. The cost of the product is on par with fiberglass. The equipment cost is the real issue.

Basically, I'm trying to maximize the efficiency of the HVAC equipment installed by the last owner. It appears the units are plain 80% efficiency natural gas heat and no more than 12 SEER A/C. In an perfect world, it would have been a geothermal ground loop system (superb efficiency), but I just cannot justify the cost of ripping out thousands of dollars worth of brand new equipment to go with something more efficient. jurgen