Specializing in Commercial Kitchen Exhaust Cleaning. We Clean In Accordance To NFPA Code 96 And Provide Before & After Photos Everytime. Kitchen exhaust cleaning (often referred to as hood cleaning) is the process of removing grease that has accumulated inside the ducts, hoods, fans and vents of exhaust systems of commercial kitchens. Left uncleaned, kitchen exhaust systems eventually accumulate enough grease to become extreme fire hazards