A cast house sits beside and at a lower level than the blast furnace which it serves. Hot molten metal, tapped from the blast furnace, is directed to flow down a series of refractory lined runners which deliver the hot metal into a transport device – usually a refractory lined torpedo car – for onward delivery to the next stage in the steel making process. Fugitive fume is released from the tap hole pouring point, the runners and the torpedo car filling station. Canopies and hoods capture this fume which is delivered through duct work to a suitable air pollution control system. The AAF FabriPulse XLC with its off-line cleaning and on-line maintenance facility is ideal for cast house ventilation and other fume control applications at a blast furnace installation, especially since continuous operation is required for many years without a shut down.