like letting you know the heat isn't turned on when the temperature is expected to drop.
So this is my interest... forget programmable or learning thermostats, I want a PREDICTIVE thermostat.
I'm fortunate to have cast iron radiators that are very efficient. However, if the thermostat heats the house to a set 70 and shuts off, there is so much heat still emanating from the radiators that the temp continues to climb.
First, you feel nice and toasty. Then the heat won't come on until the temperature drops to the set point. It's only a 1 or 2 degree difference but it's very noticeable.
Why can't a thermostat either read the returning water temp to see that the home is getting warmer or better yet, figure out the rate of rise to slow things down. For that matter, a predictive thermostat could figure out that at the rate the temperature is dropping it will be cold in an hour and gently nudge the furnace for a little heat.
Maybe there's something out there, but I have yet to find it.