Mine is only a tiny story. My grandfather - Ted Couzens designed the heating and ventilating system for the Rotunda. The system was certainly ground breaking and I can remember hearing discussions about its complexity. His company Couzens and Akers - Heating and Ventilating Engineers - also installed the systems. Their offices and works were in Aston, Birmingham. (I will look the address up if you want it)
http://www.newrotunda.co.uk/newrotunda/comments/DE...EB-045118ECB67E.html