Report on the stat selection. Got the new thermostat last week. Temps stayed in the low 70s for several days, so it didn't do anything. Finally got up to the mid 80s Sunday and the AC kicked on. Last night, low 40s. Automatically went to heat. Pretty happy with the way it works. I have the heat at 68*. With a 2* swing, it goes on at 67* and off at 69*. It will not likely be cold enough to go to aux for a while, but so far, so good. This stat is very simple to use. I think I can set it and forget it. Link to the one I chose below. http://pro1iaq.com/resources/install_manual_t855.pdf.