more good advice
Take the chill off
There are many other steps that you can take to improve comfort and energy-efficiency:
Cut down on drafts by caulking or weather-stripping around windows and doors.
Check the condition of your insulation. Do you have enough, and is it in good condition? Compressed insulation loses its value. Many utility companies offer a free energy audit that uses infrared technology to identify heat loss.
Installing a setback thermostat will give you heat when you most need it and will shut the system off when no one is at home.
Turn down the thermostat. Turning the temperature down just one degree can reduce your heating bill by 2 percent to 3 percent. Thus, turning the thermostat down from 72 F to 68 F can reduce your heating bill by up to 12 percent. Set the thermostat for 62 F at night or if you're at work all day.
Close the fireplace damper when the fireplace is not in use.
Vacuum vents and registers, and have the furnace and ducts professionally cleaned.
Install decorative ceiling paddle fans and run them in the reverse direction to circulate hot air trapped at ceilings.
Open window coverings to allow sunshine in and to create natural air currents. Be sure to close them at night.
Finally, don't forget that one of the best ways to take the chill off is by throwing on a sweater.