Smoke leakage (S): The duct shall not have a leakage exceeding five m³/h per one m² of interior surface area place. This shall be linked to the area region with the duct in the perforated plate to the tip with the duct from the inlet nozzles. Moreover, these access doors https://sergioiaocp.liberty-blog.com/37111732/5-simple-statements-about-grease-tight-extract-ductwork-explained