> Night time is usually when heating is most needed. If we are still talking about cold climates where houses are well insulated, it's a more convenient timing

> Night time is usually when heating is most needed. If we are still talking about cold climates where houses are well insulated, it's a more convenient timing but not really needed. If you cut heating for half the night or even more, indoor temp won't drop too much even if outdoor temp is notably lower than day time. It might drop a few degrees as you are sleeping warmly tucked in, but that's not dangerous, and you can still heat your bedroom if you want to avoid even that slight adjustment.