A chimney liner is a protective lining installed inside a chimney. Its primary purpose is to direct smoke and gases safely out of the home while preventing heat transfer to combustible materials. Liners can be made from various materials, including clay, stainless steel, and aluminum, each offering different benefits in terms of durability and heat resistance. In addition to safety, chimney liners help improve the efficiency of wood-burning stoves and fireplaces by ensuring proper airflow. They also reduce the risk of creosote buildup, which can lead to chimney fires. Regular inspections and maintenance of chimney liners are essential for safe operation.