Home Heating: By the Numbers 10 percent: Percentage of your heating bill you can save in the winter by using a ceiling fan which circulates warm air from the ceiling to the floor. 
8 percent: Amount of heat that escapes through your chimney when the fireplace damper is not closed.
5 percent: Amount of heating costs you save by cleaning your furnace filters monthly. Dirty filters restrict airflow and increase the amount of energy used. 
$115: Amount of money saved per year by installing an Energy Star thermostat. 
15 percent: Percent efficiency that an Energy Star qualified furnace is over an older furnace. 
20 percent: Percentage of energy saved by using an Energy Star heat pump when compared to a standard new model.