Features Chimney exhaust end with air intake (side terminal - end of the chimney through the wall) - two masking flanges equipped in standard. The side end made of acid-resistant sheet metal is designed for flue gas discharge in situations when it is not possible to lead the chimney through the roof. BI-GAS is a selected and hydraulically optimized sollution which also has self-cleaning properties. The system works under vacuum (it is not equipped with gaskets). CHARACTERISTIC: - diameter: 130/200 mm - length: 0.75 m - temperature resistance: 600°C - tested at CERIC - material: stainless steel (austenitic) 1.4404 inside, (316L, L50), 1.4301 external L20. The complete system is covered by a 5-year manufacturer's warranty.