We have our woodburner lit constantly when it's freezing as we live in an old cottage so feel like the heating doesn't quite warm the house enough on super cold days and I'm working from home so can't be sat in a cold house, so heatings off but will boost it 4-5 times a day to give the upstairs some heat. When we don't have the woodburner lit it's 18-20 and comes on and off all day according to that. Our heating goes off anyway at 11pm as I hate the upstairs being stuffy, I'd rather use extra throws and wear thick pjs than put the heating on at night, then it comes back on at 6am.