Off. ~~Type error: null is not a number.~~

I don't live somewhere that it gets to 0°C / 32°F, although it can get close in the middle of the night in winter, so I don't need to worry about the cold killing me.

Electricity is expensive though. I just dress in layers and use blankets or a hot water bottle when it's cold. When it's hot I might turn on the aircon to get myself to "not miserable", but that usually only happens a few weeks a year. I try to acclimate to whatever the outdoor temperature is.

I also keep my windows open all year. The idea of keeping an entire house (not my small city shoebox, that is at least insulated by other shoeboxes) at a constant temperature year-round is sort of weird to me. Most people I know will use the aircon or heater at home maybe half the time, they're nowhere near as avoidant of using them as I am.

I just find it hard to justify the expense, both financially and environmentally, unless I'm truly miserable and not just slightly uncomfortable.