DESCRIPTION Rigid double walled coaxial chimney system with circular section, air-adduction and thickness between 20 mm and 25 mm. The inside wall is made of polypropylene and has a seal. The outside wall made of stainless steel AISI 304 BA with a thickness of 0,5 mm has a seal and a blocking clamp.

USE Convoy of combustion products from thermic devices toward the external atmosphere. Production of ducts, flues for smoke, manifolds, chimney flues for tubing of gas-supplied condensation boilers.