Electric... I don't pay for it, so it's all good. Most places that people actually care about not going broke have a wood stove to at least cut down the electric/gas bill. Here I pay flat rate on my rent, so it doesn't matter. I also plug my dodge in because my coolant mix is borderline at -40. That and diesels HATE cold.
Like I said, I've seen a few wrecked blocks. It only takes a couple degrees the wrong way to cause major problems.
lucky you i got a space heater in my room now, keeps it at about 66F like 22C or something along those numbers.