HETAS Approved 5” (125mm) or 6" (150mm) Multifuel 316 Flexible Flue Liner With Installation Kit 1. Approvals: HETAS and CA. Common problems including insufficient draw to power the stove, lack of heat output and leaking tar/smoke can all be rectified by re-lining the chimney with a Flexible Chimney Liner; an essential product when installing into an existing fireplace and chimney.
