Class 2 (Gas and Oil)

Class 2 flex is a stainless steel flexible liner which, when installed into a masonry chimney produces a continuous and unbroken flue from the appliance to the flue outlet. This prevents flue gases escaping through disintregrating brickwork and provides the optimum flue diameter for the appliance. It is suitable for use on gas fired appliances which have a natural draught and flue gas temperature of up to 250°c, and oil appliances with the same maximum flue gas temperature including 28 second oil.