Smoke leakage (S): Failure of the criterion shall have transpired In case the circulation charge in duct A through the check exceeds ten m³ / (m² h), connected to twenty °C and 1013 mbar, connected with The interior surface area area of your duct Within the furnace. The Russian Ministry https://edgarfwkym.tokka-blog.com/37075803/the-2-minute-rule-for-fire-rated-ductworth