Grace's Guide is the leading source of historical information on industry and manufacturing in Britain. This web publication contains 148,145 pages of information and 233,681 images on early companies, their products and the people who designed and built them.
1933 Private company registered
1934 Started selling heating equipment of its own design
1935 Name changed to Terrell's Iron Steel and Coal Co Ltd
1939 Name changed to British Unit Heater Co Ltd; at this time began manufacturing heating equipment.
1946 Moved factory to Colnbrook