Smoke leakage (S): Failure of the criterion shall have transpired In the event the movement rate in duct A over the take a look at exceeds 10 m³ / (m² h), related to twenty °C and 1013 mbar, connected with the internal area place on the duct inside the furnace. https://fireratedinsulationforduc81122.blog-ezine.com/37095262/fire-rated-ductworth-an-overview