The insulated element is designed to change the flue's direction and bypass obstacles during installation. The internal circuit is made of 0.5 mm thick AISI430 stainless steel. The insulation is made of basalt wool, which minimizes condensation and facilitates rapid flue warm-up and system startup. The cold-formed socket joint ensures ideal geometry and gas tightness. Laser butt welding ensures a thin and durable seam, significantly increasing the system's service life. Operating temperature up to 450°C.