Metal flue liners type KF Application Metal negative pressure flue liners type KF to carry off exhaust flue gases, providing protection to existing ceramic chimneys and adjusting the chimney cross-section to the requirements of today’s heating units Fuel Oil, gas and energy solid fuels Specification Material acid-proof steel 1.4404/1.4301 Material thickness 0,5mm; 0,6mm; 0,8mm; 1,0mm Working temperature standard execution ≤450 °C Diameter range 100mm - 500mm Certificates Technical description Declaration of commercial properties