Have the newer model 1S with latest firmware and official MiHome app.
Testing experience at a 30m2 living room, starting at 15°C:
- With target temp at 20°C heater is consuming 2100W;
- Reached target temp aprox after 2h and heater didn't turn off, only lowered consumption to 1100W and never passed the target temperature;
- Maintaining the room temp, I have to lower the target temp until 16°C in order to heater turns off completely;
- Imediatley raised target temp to 19°C and heater maintains 860W consumption, if go to 20°C raises again to 1100W...
This means heater doesn't turn off automatically and it seems that only adjusts its power consumption to the lowest by regulating target temp, and only after have reached it... Same result by adjusting on the panel or in the app, by the way.
Later I will test total consumption in an average day use, with this "constant power" heater auto management Vs auto off/on automation management - already tried heater off above 19°C and heater on below 18°C, this way it keeps on standby for 40min and then keeps running for 25/28min until stops again.