Grease duct is both routed through a fire rated shaft enclosure or wrapped by having an accredited fire insulating blanket that allows for zero clearances, like that created by 3M. It's also crucial that you often clean up your commercial kitchen extraction process, not just for functionality and effectiveness but https://greasetightextractductwor34566.myparisblog.com/37639581/5-easy-facts-about-commercial-kitchen-extract-systems-described