Hood element fore combined feed/waste air pipes in heating systems has part with rounded section having groups of Laser cuts, for easy fitting without tools

摘要

The hood element has a partially rounded cross section, and has a part with a cross section, which is slightly larger than that of a constructional element. At least two approx. parallel Laser cuts are placed in a rounded section of the part (2) and extend approx. parallel to the axis of curvature of that rounded section. The distance between the cuts is shorter than their length. Constructional element (4) and part are tubes with a wall thickness of approx. 0,5mm. The hood has a conical cap part (1) fitted to its upper edge (3).