I'm in Ireland. My ancient cottage gets down to about 13°C with every-other-day heating, even if it's 0° outside. Rarely colder. I do indeed just wear a jacket

I'm in Ireland. My ancient cottage gets down to about 13°C with every-other-day heating, even if it's 0° outside. Rarely colder. I do indeed just wear a jacket or a sweater, and I have a heated blanket on the couch. You get used to it and start to prefer it! If it were 22° in here I'd be in a T-shirt opening windows to let some heat out.