This Home Assistant blueprint automatically turns off all climate devices in a selected area when its occupancy sensor reports “off” for 10 minutes. It helps reduce energy usage when a room becomes empty.
Nice and simple. One thing from running the same automation on my living room aircon: the timer matters less than what’s feeding the occupancy sensor. With a PIR-type sensor, ours reported the room empty for two hours straight while someone sat watching TV, so a 10 minute timeout would have shut the AC off on a person and never brought it back. mmWave is the better fit, with one caveat from my own two units: the bedroom one holds a sleeping person all night (12 hours straight, not a single off), while the nursery one drops people for up to 62 seconds, because I’d cut its range down to 2.5 m to kill a ghost and the chair sits 1 cm inside that line. So 10 minutes is plenty for mmWave as long as you haven’t squeezed the range onto the furniture, and for PIR I’d pair it with something else (door sensor, TV state) before trusting “off for 10 minutes” to mean empty.