In high latitude Australia I reckon this is seems to be the norm. A lot of prison colony age houses still and not great insulation so attempting to maintain a w

In high latitude Australia I reckon this is seems to be the norm. A lot of prison colony age houses still and not great insulation so attempting to maintain a warm temp in the entire house would be expensive, plus it typically doesn't get that much below freezing even if that. If you don't have a wood burner stove it is common to have a couple panel heaters in strategic rooms, use hot water bottles in bed, etc.