Double wall modular rigid elements ISO 25 RUSTY System, with quality finished of the exterior wall painted „Rusty“ for De Marinis S.r.l. made with the inner wall of stainless steel AISI 316 L BA minimum thickness of 0,4 mm and outer wall in 0,5 mm thick galvanized sheet, meeting the standards set out by European standard CE according to EN 1856-1, 2009, with requirements for designation T200-P1-W-V2-L50040-O40 with gasket, alternatively for applications without gasket, with the designation T600-N1-W-V2-L50040-G85 according to the same standard above described. Insulation made of high density mineral wool 25 mm thick., pressed and interposed between the walls without connecting elements between the same (thermal junction). Classic junction “male-female” calibrated for both sides, with triple lip gasket to be applied on internal wall, , conforming to European standard EN 14241-1 and certified by De Marinis Srl in conjunction with their products with specific laboratory tests marking according to the European standard EN 1856-1:2009 above mentioned: mechanical connection with locking band, as required by the installation instructions provided by the manufacturer. The installation of every flue system must occur in accordance with current regulations and strictly according to the manufacturer’s instructions contained in the manual, reporting compliance declaration, operating and maintenance and product warranty.