2022 is a harsh and cold year for Europe as the gas bill increases at large gap. More and more people are replacing the mechanical thermostat and install smart programmable digital thermostat. How do energy efficient thermostats work during this cold winter?   Smart progam thermostat offers 7 days 4 periods programmable function. Warming up the room at a cozy temperature setpoint within 7 days 4 periods, such as when you go to work, go back to home and go to sleep etc. Program function makes home heating but save more energy without constant manual control.   In addition, LCD digital thermostat is ±0.5℃ temperature control, which is more accurate than mechanical thermostat. And ETOP thermostat can do ±0.1℃ heating control and wifi remote control.