... you burn coal to heat your home!
Because of the cost of heating, we only heat the rooms when we are in them. Each room, including the kitchen and living room has a door to help keep the heat in. So that definitely helps, but at the same time exponentially ups the number of times Tim says to the girls, "Close the door; you weren't raised in a barn!"
But after some practice now I think we have the hang of it and are really enjoying the chance to sit by that warm glow in the evenings with a book and a cuppa tea when the kids are in bed!