What is a Chimney Liner?
Since the 1940s traditional masonry chimneys have been constructed with an inner liner of clay tiles. The purpose of these clay tiles is to keep the heat of flue gases inside the chimney, and prevent the nearby combustible material from overheating. If the nearby walls or framing overheat from the flue gases, a fire may be the result. The liner is also responsible for keeping carbon monoxide, smoke, and other dangers from seeping through the bricks of your chimney, and into your home. As you can see, having a reliable chimney liner is extremely important in protecting your family and home.
Replacing A Chimney Liner:
A chimney relining system is used to replace the existing clay liner in your chimney. Over time a clay chimney liner begins to deteriorate and crack, and it will need to be replaced. A stainless steel chimney liner is the most popular option in replacing an existing clay liner. Stainless steel chimney liners costs about the same as replacing the existing liner with a new clay liner, however a stainless steel liner is much more durable, which is why it is the preferred option. Aluminum liners are used in gas installations only (not wood or oil), where there are lower flue temperatures and less corrosive gases. Stainless steel liners can be used for heating appliances that operate on all types of fuel, including wood, oil, and gas.
Determining Diameter and Length of your Chimney Liner:
The collar size of your appliance will determine the diameter of the chimney liner you should use. Take the inside diameter of your appliance you are connecting the liner to, and that will be the diameter liner you need. Using the wrong size diameter will create inefficiencies and venting problems that will be hazardous to your home. The length of liner needed will be determined by the amount of feet from the chimney crown located on the roof to the gas appliance in your home where it will be connected. Any turns or bends between these two points should also be accounted for. Additional liner lengths can be connected using liner couplings.