When I moved back to Dallas from Austin in 1980 my first house was an old, drafty one built who knows when. It had floor furnaces (central AC but not heat) and was a cold SOB! Lots of added space heaters made it liveable. But the best part was the electric blanket on the bed!
About 30 minutes before sack time I'd fire that mother up. Nothing like crawling into a toasty bed when it's chilly.