Smoke leakage (S): Failure of this criterion shall have transpired If your movement amount in duct A during the check exceeds ten m³ / (m² h), connected to 20 °C and 1013 mbar, associated with the internal surface area place of the duct inside the furnace. Oxygen: Oxygen in the https://ductworth-installation34566.bloggadores.com/35654213/a-review-of-fire-resistant-ductworth-isntallers