Smoke leakage (S): Failure of this criterion shall have happened Should the move amount in duct A in the course of the examination exceeds ten m³ / (m² h), connected to twenty °C and 1013 mbar, linked to the internal surface area region of the duct Within the furnace. Nondirectional https://fireratedductworth35789.dm-blog.com/36910879/about-fire-rated-insulation-for-ductworth