Smoke leakage (S): The duct shall not Use a leakage exceeding five m³/h for every 1 m² of interior surface space. This shall be linked to the floor location of your duct in the perforated plate to the tip from the duct with the inlet nozzles. These restrictions are set https://grease-tight-extract-duct91233.theobloggers.com/43267719/the-basic-principles-of-grease-tight-extract-ductwork