Do you turn off the heating in every room in your house when you go out to work?

Even if you did have some "smart" appliance that would make it easier, you'd have to "over-heat" when you come back to get again the desired temperature (or pre-heat a few hours before coming back), which would mostly make the effort's result insignificant...

It would make sense to drop heating when leaving for a few days though, week-ends/holidays. Offices are not heated on week-ends for example.