Modular system with circular section made in AISI 316L (L50050) stainless steel, 5/10 metal thickness and with BA outer finishing (i.e. mirror polished) and longitudinal laser welding. INOX SW system is suitable for the smoke exhaustion either with the use of the seal with a temperature ≤ 200°C (T200) in positive pressure (P1), or without the application of the seal up to 600°C (T600) with negative pressure (N1). The INOX SW system is suitable to directing the combustion products of oil, methane, LPG, wood, coal, combustion oils, lignite, peat and any other type of fuel. It can be installed on all heat generators (condensation type included). Each element is provided with ‘male-female’ joints with a suitable seating for the insertion of the special triplelips, thermo-resistant  SILICONE SEAL (included up to the diameter 160 mm). Total thickness 0,5 mm.