Smoke leakage (S): The duct shall not Possess a leakage exceeding 5 m³/h for each one m² of internal surface area place. This shall be associated with the floor area on the duct within the perforated plate to the end on the duct via the inlet nozzles. ROCKWOOL Curtainrock® is https://raymondrkzpe.blogdanica.com/37087632/top-latest-five-fire-resisting-ductwork-insulation-urban-news