Cardowan Colliery, ventilating fan.
Introduction
The photograph on this page of Cardowan Colliery, ventilating fan. by Chris Allen as part of the Geograph project.
The Geograph project started in 2005 with the aim of publishing, organising and preserving representative images for every square kilometre of Great Britain, Ireland and the Isle of Man.
There are currently over 7.5m images from over 14,400 individuals and you can help contribute to the project by visiting https://www.geograph.org.uk
Image: © Chris Allen Taken: 26 Apr 1982
This is almost certainly the standby fan. This is a modern high-speed fan - possibly a scirroco. I think I might have seen the working fan but that would have been a photographic challenge with fast moving humid air.