Re: This should be considered safety critical software
When I was in Canada, I was never in a house that didn't have insulation, and usually a good boiler in the basement pushing warm air through vents in the floor. Toasty warm inside all the time, and the heat never went off, when when the house was empty, because everything inside would freeze.*
Heating is essential for life in Canada: houses, garages, car parks, buildings, you name it.
*Freeze as in frozen solid, not 'gosh I am freezing'