Fan house (1858—1908) above the Doehlen airshaft of the Royal Saxon Colliery Zauckerode (Freital). From 1858 until 1873 a two-cylinder piston pump ventilated the underground colliery by a 75 m deep airshaft. The pump was driven by a water wheel at the nearby Weisseritz; the power was transferred by an overhead flatrod system. The piston stroke was more than one meter. Later on (1873—1908) the piston pump was replaced by a steam-driven Guibal fan.