The minimum amount duct thickness is outlined by whichever code jurisdiction the project is found in. Below are two code references connected with the needed thickness and substance kind for grease ducts. Overhang: The extraction Cover need to overhang the cooking products by a minimum of 250mm with the front https://commercialkitchenextracts23456.estate-blog.com/35933140/the-definitive-guide-to-grease-tight-extract-ductwork