Flexible Flue Liners
Stainless steel flexible flue liners are designed for lining an existing flue or masonry chimney and are suitable for gas, oil and multifuel. There are two grades available, 316L and a higher grade of 904L which is suitable for the extreme conditions found with coal based solid fuel installations.
If your property has an existing chimney then this would normally be the recommended flue system to install, it is cost effective and makes use of the current fireplace in the property.