Fan House at Hetty Shaft

A single-storey fan house of snecked rock-faced stone, the openings (all now blocked) with brick jambs and concrete sills and lintels, and a flat roof of steel sheets. On the W side is a wide central doorway, reached up stone steps with concrete treads, with flanking windows. Further L is the cylindrical fan casing and then the curved brick flue with concrete roof, through which steel trunking is inserted to the evasee (and used to blow air into the shaft rather than draw it out). The E wall has 3 windows and the tall evasee at the N end. This has 2 pairs of cover plates. The S wall has a doorway to the R with external steel steps, and 2 windows.

Inaccessible at the time of inspection.