Grace's Guide is the leading source of historical information on industry and manufacturing in Britain. This web publication contains 144,355 pages of information and 230,176 images on early companies, their products and the people who designed and built them.
of London and Trowbridge, Wiltshire, which later became the Haden Group.
1816 Company founded.
1919 Private company.
1914 Heating, ventilation and general engineers. Specialities: heating, ventilation, hot and cold water supply, electric lighting and power plants, cooking and laundry plants, experts on heat economy. 
1921 Company made public.
1926 Received an order to furnish the heating equipment for Carliol House, Newcastle. The method adopted is the lower-pressure hot water panel system, large thermal storage cylinders, containing elements for heating up the water by means of electricity, being employed. The idea is to take current from the local electricity supply at times of small demand at the generating station, when power is obtainable at specially small cost.
1937 Heating and ventilating engineers. 
1961 Heating, air-conditioning and piping and sanitary engineers. Products include: warm and cool air; industrial process services. 3,000 employees. 
1970 Acquired Carrier Engineering Co
1971 The main operating subsidiary, Haden Young, mechanical services supplier, won a contract for air conditioning, heating and fire protection in an 18 storey building and many other such contracts.
1971 Name changed to Haden Carrier
1972 Australian subsidiary, Drysys Equipment, gained a contract for a paint shop for Todd Motor Industries of Wellington, New Zealand
1973 The 2 main divisions in the UK, Haden Young and Carrier Drysys, were both affected by building workers' strikes
1976 Formation of venture with Rockall Scotia Resources Ltd, Haden Rockall Maintenance, to offer services to the North Sea oil industry
1985 Management buy-out of the painting company
1987 Haden Group and Haleworth Holdings, both private companies, were acquired in a reverse take-over by P. and W. MacLellan, an agricultural parts supplier which had been taken over by entrepreneur Philip Ling. The new group would be known as Haden MacLellan Holdings.
2005 Haden Drysys was declared insolvent