Flues & air ducts

Flues and air ducts channel combustion gases away from the burner or boiler and supply the combustion air that the appliance needs to fire safely. They sit between the heat exchanger or burner head and the terminal point at the wall or roof, and their correct sizing is essential both for appliance efficiency and for meeting ventilation regulations.

Choosing the right component depends on duct diameter, length, material (stainless steel, aluminium or plastic), connection type (push-fit, flanged or threaded), angle of bends, and whether the system is room-sealed (concentric) or open-flue. If you have an order number from the original equipment manufacturer or another supplier, enter it in the search box — we can match it to the equivalent part in our catalogue.