Mines were originally ventilated by having a furnace at the bottom of the shaft to draw air through the mine, with the associated fire risk.
Two types of fanhouses seem to be used across most of Cleveland (they often seem to be the only remaining buildings)
The Sirocco is a later centrifugal fan, invented by Samuel Davidson , with narrow
blades curved forward, mounted at the periphery of a braced, open drum. It
is a high-speed, small-diameter fan. One of these exists at Grinkle.