Good grief, I'm beginning to wonder if I'm actually still alive as I'd be freezing at the temperature some people have their houses on.
Mine is usually set on 21.5 during the day, but come the colder weather, as it is at the moment, that goes up to 23.5, which I'm comfortable with when I'm doing housework and stuff, and then I will manually increase it during the evening.
Sitting in my living room yesterday evening I was wearing, on top of my underwear, a light long sleeved jumper, a slightly heavier long sleeved jumper and a thick cardigan, I'd also left the scarf on that I'd been wearing when I walked the dog; my heating thermostat was set the whole evening between 24 and 25.5, I turned it up that high at one point because I was really cold.
During the night it's set at 10 degrees so it goes off completely. My heating would not actually switch on at 18 degrees let alone make the radiators warm so how do people keep warm at that temperature?
I live in a well insulated 4 year old new build with double glazing and have no health issues that would cause me to be particularly cold. Having said that, I've lived in various types of houses and never have I been able to heat a house at 18 degrees.