If you’re wanting to save money, (via saving energy) an energy saving top mounted damper is something you should take a look at. A traditional damper is metal and closes inside of your firebox. Is yours open or closed? If its shut, often times it doesn’t seal. This presents a problem when running your air conditioning or heater. Air from inside the house that you want, (i.e. cool air or warm air) will end up leaving your house through the chimney. Would you leave a window open while your air conditioner/heater was on?
Lock Top II Dampers are mounted on top of you chimney and offer an air tight seal. This means that you won’t have to worry when you use your air conditioning and heater. Closing a chimney from the top will end the days of having cold air trapped in your chimney. The cold air can cause smoking issues, inside of the house, because of a cold chimney.