1. Close the damper tightly when you’re not using the fireplace to keep the heat in.
  2. Do you use gas logs? Consider adding a cast-iron fire back to your fireplace to promote heat transfer into the room.
  3. If you have a fireplace, check the chimney. It’s a prime escape route for hot air, both from fires and your heating system.
  4. Install glass doors in front of the fireplace to help keep warm air from being drawn up the chimney.