Smoke leakage (S): Failure of this criterion shall have occurred When the circulation level in duct A in the course of the exam exceeds ten m³ / (m² h), associated with twenty °C and 1013 mbar, relevant to the internal surface area area on the duct Within the furnace. The https://fireratedinsulationforduc02344.dm-blog.com/36898686/fire-rated-ductworth-an-overview