Smoke leakage (S): Failure of this criterion shall have happened In the event the circulation charge in duct A throughout the test exceeds ten m³ / (m² h), relevant to 20 °C and 1013 mbar, linked to the internal surface area area of the duct In the furnace. Extinguishing Procedures: https://fire-rated-insulation-for34455.bloggadores.com/35967168/5-tips-about-fire-rated-insulation-for-ductworth-you-can-use-today