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Twin Wall Flue Systems

S-Flue is a twin wall insulated chimney flue systame manufactured by SFL in the UK. The outer skin is made from 304 grade stainless steel and is 0.4mm thick. The inner skin is made from 316 grade stainless steel and is 0.4mm thick. The insulation is compressed rockwool giving a density of 230kg/m3. The insulation is encapsulated within the twist-lock couplers. All parts are fully laser welded. The distance required from the outer skin to combustible materials (e.g. wood, plaster board) is 50mm. For use on solid fuel and gas/oil appliances. eg: wood burning stoves, multi fuel stoves, gas coal effect fires, oil boilers etc.