Occasionally, a fireplace is designed poorly and it doesn't draft properly. In these cases, we sometimes recommend the installation of an exhaust fan at the top of your chimney. An electrician will mount a switch on a wall near the fireplace opening. Once this feature has been added to your fireplace, you may build a fire, flip the switch, and the exhaust fan will help draw the smoke up your chimney, allowing you to enjoy your lovely fireplace without filling your house with smoke.