From this thread on wattsupwiththat - Click here
Posting by Sturgis Hooper - Click here
The Evap In is the air going into the return air for the Air Condition System.
The Evap out is the air coming out of the vents that cool the rooms in the house.
The Cond In is the outside ambient air that is sucked into the AC unit outside.
The Cond Out is the hot air that is coming from the AC unit outside.
Earth Temperature is regulated. It looks just like this.
The cooling comes on when needed, it runs as long as necessary and goes off when not needed.
This is Data from the Air Conditioning System in a house.