A chimney liner adds a layer of protection between the inside of your chimney and the framing of your home. They protect against poisonous gases, and the potential for a damaging fire that can potentially harm your family. Furnaces, boilers and hot water tanks exhaust large quantities of water vapor during the normal combustion process of natural gas. Oil and gas furnaces produce by-products which can literally eat away the flue lining. Any type of chimney liner that is breached can cause a fire, since heat can reach combustible parts of the home. Clay liners that have gaps or cracks, allow this moisture into the interior structure which eventually deteriorates the masonry structure from the inside out. Additionally, dangerous gases vented from gas burning appliances can escape the lining and migrate into the home.
Blockage in a furnace flue is extremely hazardous because it can cause carbon monoxide fumes to enter your home.
Often when having a new natural gas or propane water heater installed, a new chimney liner is recommended, or even mandated by code. This requirement is a critical safety consideration for your property and addresses several issues.
Information provided by Lindemann Chimney and Fireplace 2018
