New customized odor, grease and soot removal system OCS OCS removes odor, grease and soot coming from the aeriform extracted from kitchen hoods related to non-residential activities that cook food before expelling them into the atmosphere (patent No. MI2008A002306). The unit offers countless advantages: INSTALLATION WITHOUT FLUE: the installation of our OCS is allowed in utilities without flue for the expulsion of aspirated fumes to the roof (to be verified with local Health service). ADAPTABILITY: Very interesting is