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Flue lining systems shall comply with one of the following:
  1. Clay flue lining complying with the requirements of ASTM C315.
  2. Listed chimney lining systems complying with UL 1777.
  3. Factory-built chimneys or chimney units listed for installation within masonry chimneys.
  4. Other approved materials that will resist corrosion, erosion, softening or cracking from flue gases and condensate at temperatures up to 1,800°F (982°C).
2113.11.1.1 Flue Linings for Specific Appliances
Flue linings other than those covered in Section 2113.11.1 intended for use with specific appliances shall comply with Sections 2113.11.1.2 through 2113.11.1.4, 2113.11.2 and 2113.11.3.
2113.11.1.2 Gas Appliances
Flue lining systems for gas appliances shall be in accordance with the International Fuel Gas Code.
2113.11.1.3 Pellet Fuel-Burning Appliances
Flue lining and vent systems for use in masonry chimneys with pellet fuel-burning appliances shall be limited to flue lining systems complying with Section 2113.11.1 and pellet vents listed for installation within masonry chimneys (see Section 2113.11.1.5 for marking).
2113.11.1.4 Oil-Fired Appliances Approved for Use With L-Vent
Flue lining and vent systems for use in masonry chimneys with oil-fired appliances approved for use with Type L vent shall be limited to flue lining systems complying with Section 2113.11.1 and listed chimney liners complying with UL 641 (see Section 2113.11.1.5 for marking).
2113.11.1.5 Notice of Usage
When a flue is relined with a material not complying with Section 2113.11.1, the chimney shall be plainly and permanently identified by a label attached to a wall, ceiling or other conspicuous location adjacent to where the connector enters the chimney. The label shall include the following message or equivalent language: "This chimney is for use only with (type or category of appliance) that burns (type of fuel). Do not connect other types of appliances."

Related Code Sections

2113.11.1 Masonry, Residential-Type Appliances (General)
). Flue lining and vent systems for use in masonry chimneys with oil-fired appliances approved for use with Type L vent ...
2113.11.1 Masonry, Residential-Type Appliances (General)
). Flue lining and vent systems for use in masonry chimneys with oil-fired appliances approved for use with Type L vent ...
2113.11.1.3 Masonry, Pellet Fuel-Burning Appliances
Flue lining and vent systems for use in masonry chimneys with pellet fuel-burning appliances shall be limited to flue lining systems complying ...
2113.11.1.5 Masonry, Notice of Usage
or equivalent language: "This chimney is for use only with (type or category of appliance) that burns (type of fuel). Do not connect other types ...
2113.11.1.5 Masonry, Notice of Usage
or equivalent language: "This chimney is for use only with (type or category of appliance) that burns (type of fuel). Do not connect other types ...