Superior chimney venting systems, formerly known as FMI, feature a double wall build that consists of a stainless steel inner wall and a galvanized steel outer wall to provide cooling air which is necessary to maintain safe chimney temperatures and emit gases out of the fireplace. This pipe feature a snap-lock design which provides easy installation for the installer. Only Superior Chimney components are approved for use with FMI or Superior Fireplaces. They are UL approved and are not for use with any product other than FMI or Superior Fireplaces.
