State of the art Stainless Steel grease duct systems are NFPA-96 compliant, designed to safely convey grease laden vapors from commercial kitchen cooking equipment. Combining industry leading performance with ease of installation, NAKS factory-built grease duct systems incorporate a steel to steel overlapping conical joint which requires no field welding. This joint design critically protects the seal surface and withstands high pressure washings. Double wall and large diameter single wall options incorporate flanged connections and clamp bands for maximum rigidity. Innovative accessories including cutable lengths, built in access doors on offsets, and no weld hood adapters all combine to make this your best ducting option.