Terminal duct for balanced flue

摘要

The device has an internal tube (2) extending upwards to form an exit unit (3), and an external tube (4) surrounding the tube (2). An entrance unit (5) of combustion air is found below and at a distance from the exit unit. The unit (5) is on the periphery of tube (4) such that an upper part of an annular space forms an insulating compartment when a lower part forms a pipe transporting the combustion air towards a heating device.