When you are in the kitchen cooking this winter, do not run the exhaust fan for more than 10 or 15 minutes. The same goes for the bathroom. When you are done smelling the place up, run the fan only a short time. These exhaust fans will suck the heat out along with odors, so don't forget about them. Don't go outside to talk to a visitor and leave the door open. There are many things you can do to stop the heat loss, the biggest thing is being aware of what is going on. See you soon.