Volumetric flow rate: (T1) Mold filling hood - 1650 cfm (T2) Launder hood - 2460 cfm (T3) Metal tapping hood - 3660 cfm (T5, T6, T7, T8) Refining kettle hoods -  4700 cfm (T9, T10) Skip hoist furnace charging hood - 12100 cfm (T12) Slag tapping hood - 4540 cfm (T14) Skip hoist hoods (top and bottom) - 3930 cfm (T15) Slot hood over furnace access doors - 1940 cfm Exhaust pickups for new kettle hoods - 2940 cfm Discharge from slag tapping baghouse - 5000 cfm Inlet to main exhaust fan for smelter exhaust ventilation system - 41700 cfm

Proceedings of the Symposium on Occupational Health Hazard Control Technology in the Foundry and Secondary Non-Ferrous Smelting Industries, U.S. Department of Health and Human Services, NIOSH Publication No. 81-114 (1981).