Lbendlin wrote:I am collecting all the data from my thermostats in a little database. I plan to learn the hysteresis of the house, taking outside temperature into account, and then to apply this to adjust the schedule myself. Personally I wouldn't want a third party make these decisions for me.
That may work in a climate with fairly constant temperatures, but it won't work in climates where the temperature varies substantially day to day, especially if you have a large setback at night (ours is 55F). On warm nights, it takes only 30 minutes or so to get our house up to temperature. On cold nights, it takes a couple of hours.
Our current thermostat (a 20 year old Honeyell) characterized our house and HVAC system in a few weeks, and now gets our house to the target temperature within minutes of the prescribed time, saving lots of energy (or conversly, lots of complaints that it's too cold) vs. me manually setting the recovery time. And the feature is selectable, as it should be when RTCoA implements it.