The minimum duct thickness is described by regardless of what code jurisdiction which the venture is situated in. Under are two code references connected to the needed thickness and material type for grease ducts. Overhang: The extraction canopy should really overhang the cooking equipment by not less than 250mm on https://grease-tight-extract-duct01122.bleepblogs.com/37418051/the-definitive-guide-to-grease-tight-extract-ductwork