Alarm user if open window has been forgotten
A few times a window has been left open overnight which have caused quite a bit of heat to be wasted. Could you consider implemebring a feature to take care of this? You could fx calculate the heating rate under normal circumstances, and if the heating rate at a given time is much lower (if a window is open), could you then turn off all heating and notify the user with an alarm. Likely a loud one so the user will be woken up if asleep.