Smoke leakage (S): Failure of this criterion shall have occurred if the move level in duct A in the course of the examination exceeds 10 m³ / (m² h), related to twenty °C and 1013 mbar, connected with the internal surface space with the duct Within the furnace. Smoke extraction https://fireratedinsulationforduc45566.newsbloger.com/37643024/fire-rated-ductworth-an-overview