The SD08 system is used as a self-supporting metal system made of acid-resistant steel sheet for flue gas discharge from high-temperature boilers for ecological solid fuels (wood).

The system has a maximum temperature resistance of 600 degrees C. It is made of 0.8 mm thick sheet metal, grade 1.4521. The outer jacket is made of stainless steel grade 1.4509. The elements of the system are connected to each other in a socket-like manner and there is no need to use gaskets. The system is insulated with 25 mm thick low-temperature thermal insulation wool.