An open chimney damper allows the smoke from a fire to exit the home. A closed chimney damper limits outside air from entering home when the fireplace is not in use. Lindemann Chimney sells several kinds of dampers. Throat dampers close the chimney flue at the base, which keeps cold air that may gather in the chimney, from accessing the home. Top Sealing chimney dampers create a tight seal on the top of chimneys, saving homeowner’s money by keeping your paid for energy in the home not up the flue. Spin dampers are designed for stoves and work well with older stoves that lack adequate air/inlet damper controls. Dampers drastically cut down on heating costs and keep your fireplace or stove functioning properly.