This will be my success story thread for our Geothermal system installed on 8/6/2010, after help from others from these forums. A little history on our home located in O'fallon, MO. It is a ranch built in 1994, just under 1200 square feet. The system replaced an original 2-1/2 ton A/C and strip heat. Load Calculations: St. Louis, MO area Summer outdoor drybulb 95, indoor 75 Winter outdoor drybulb 0, indoor 70 Heating-24580 Btuh, Cooling-23238 Btuh We installed a Bryant GT-PX 2 ton, it is a 2 stage system with 12 KW of backup strips. The system is linked to 2-200 ft vertical wells. Just received our latest bill, 1134 KWH/ 453 cooling degree days, the last two months were 1356/467, 1462/426. Our new system was only in place 20 of the 30 days on this bill, and the desuperheater wasn't hooked up until the last 10 days of the period. I am only home during the evenings on weekends and have only heard the system in second stage during the 2 degree drop for night and 1 other 93 degree day when everyone was home and we were cooking a big meal. We are very happy so far, the system is quiet, and the house is very comfortable at all temperatures. The old system left the house humid on days below 90. We have had a high of 98 and the system handled it with no problems, although run time increased it was cycling and not running continuous.