Open PDF - Harworth Heating Ltd

This means that the lower part of the flue must be so designed so as to slide upinto the upper part of the flue.The upper part of the flue will need to be secured to the deck flange so as to makeit self-supporting when the lower part is not fitted to the boiler.4.10.1 VERTICALVertical Flue Arrangements.Where the flue system is within 150 mm of any combustible materials it must beinsulated and securely wrapped with foil-backed duct wrap minimum 25 mm thick.There must be no area of the flue pipe, which is un-insulated.The insulation materials must be securely and adequately fixed to the flue system.ABCD70mmE15