Franbern I had hypothermia on Sunday. I was at a carboot sale and had several layers on and didn't feel cold, this is the danger of hypothermia, you do not feel cold and do not realise that you are very slowly cooling down. But when I got home I realised how chilled to the core (quite literally) I was, so I went and lay in a really hot bath for half an hour and then dressed warmly and had a hot drink.
I envy these people who seem not to feel the cold. I have always felt the cold, even as a child, and in recent years more than before. My mother and her sister were lso chilly mortals so I assume it is genetic.
I also hate a hot house so CH is a balance between a cool room temperature, that is not too cool to cause hypothermia and extra clothing. I find a thermostat setting of 18.5 degrees is about right.