This insulated element is designed to change the flue's direction where the flue duct connects to the main flue. It can be used for inspection and cleaning of the flue. The seamless connection between the side flue and the vertical section makes this element more reliable and safe. The internal circuit is made of 0.5 mm thick AISI430 stainless steel. The thermal insulation is made of basalt wool, which minimizes condensation and promotes rapid flue warm-up and system startup. Cold-formed socket joints provide ideal geometry and gas tightness. Butt laser welding ensures a thin and durable seam, significantly increasing the system's service life. Operating temperature up to 450°C.