Interesting. I just put in a new Ultra-High efficiency furnace and the install tech (and salesman touting it’s efficiency) told me to set it at one temp, and keep the fan running constantly. If I were to program it (at least in my house) I’d lose all the efficiency of the furnace. Coincidentally, Carrier also sells this as part of the whole system, if you chose to have it.
Where you can program everything from Temp, Fan to Humidity and air flow via. mechanical louvers. Still not as nice as the old Honeywell’s…