Smoke leakage (S): Failure of the criterion shall have transpired In the event the movement price in duct A in the take a look at exceeds 10 m³ / (m² h), linked to 20 °C and 1013 mbar, related to The inner floor region of the duct Within the furnace. https://fireratedductworth68900.blazingblog.com/36818732/the-greatest-guide-to-fire-rated-ductworth