A way of save energy at home is having a thermostat that control temperature intelligently. And this model of TADA It’s on sale.
With it you can program the temperature of each of the rooms at specific times. This way, the house will be warm whenever you are inside. Even if you just arrived.
Now, you can also do it in a more manual way. And, during the hours you are away from home, deactivate the heating so that when you return, it notifies you that you have to reactivate it.
On the other hand, detects if you have left a window open and are losing heatthanks to the detection of changes in temperature and humidity.
No WiFi connection needed. AND can be linked to any smart device in your home.