I've just been reading about what temperatures people are supposed to feel comfortable in, after an office discussion about air-con yesterday. My thermostat at home is kept at 17.5C (63.5F) and I walk around in bare feet and often wearing very little . Any warmer and it feels really stuffy, yet I'm told that 20-21C (68-69.8F) is best for living spaces. I don't get it. Another weird thing: the air-con in the office is set to 23C (73.4F) and it feels just right for working in, yet if I heated a room to that temperature it would feel really hot. Any reasons why that is?