Grace's Guide is the leading source of historical information on industry and manufacturing in Britain. This web publication contains 148,153 pages of information and 233,681 images on early companies, their products and the people who designed and built them.
Trading as Diffusion, supplier of fan coil and commercial heating equipment.
2000 Moved from Oldbury to West Molesey
2015 Non-trading subsidiary: Diffusion Environmental Systems
Then became Diffusion Group which was acquired by Volution