UL 1777 and cUL S635 Listed

• For use with category II, III or IV gas burning appliances as defined by the national fuel gas code, NFPA 54 or other appliances that result in condensation or corrosive acids on the liner of the chimney or that create positive pressures in the chimney system Z-Flex® is engineered to quickly conduct heat, assisting in a natural draft system Kit must be insulated for wood burning applications

Z-Flex® stainless steel chimney liner kits everything you need to get the job done right Z-Flex® stainless steel chimney liner kits come complete with everything you need to quickly and easily install a professional venting system. Manufactured from special high-temperature and acid-resistant stainless steel exclusive to Z-Flex® and designed with 'deep corrugations' to provide for greater flexibility and ease of installation. The result is a clearly superior product, offering incredible longevity.