This is the coolest thing I have ever seen...3.5 ton system holding a 73 degree temp in 100+ degree weather on 2500 square feet with 10% outdoor air.
The house was foamed from the foundation to the crown of the attic. every exterior wall and celing were foamed and there was NO other insulation in the attic!!! AND it was 78 degrees in the attic!!! Like I said, "the coolest thing I have ever seen"