Smoke leakage (S): Failure of the criterion shall have occurred If your circulation charge in duct A through the check exceeds ten m³ / (m² h), relevant to 20 °C and 1013 mbar, connected to The inner surface area region of the duct Within the furnace. The Russian Ministry of https://fireratedinsulationforduc66788.idblogmaker.com/35972006/everything-about-fire-rated-ductworth