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 Guibal is earlier and uses a lower speed, large diameter fan to pull the air from the mine up through the chimney as seen as Huntcliffe and Skelton Shaft
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.
Skelton mine was located above what is now Waterfall Farm near Guisborough, a very busy area for mines being only a short distance from Skelton Park, Spa Wood, Tocketts, South Skelton and Aysdalegate.
The void where the fan stood is accessible through a very tight squeeze on the eastern wall, or by scaling the western wall.
The top of the filled shaft is visible as a ring of bricks just to the south of the fan house.