Grace's Guide is the leading source of historical information on industry and manufacturing in Britain. This web publication contains 137,287 pages of information and 220,285 images on early companies, their products and the people who designed and built them.
of Ideal Works, Hull
of Ideal House, Great Marlborough Street, London, W1. Telephone: Gerrard 8686
1934 Public company formed to acquire the business of manufacturing Ideal boilers, radiators, etc from National Radiator Co; would use part of the proceeds of share offer to build an additional factory
1937 Listed Exhibitor British Industries Fair. Selection of Ideal Boilers, Radiators, Rayrads, and Accessories for Central Heating and Hot Water Supply. Standard Sanitary Appliances - baths, vitreous chain, lavatories and closets, all made at Ideal Works, Hull. (Stand Nos. B.419 and B.318)
1938 New plant installed to make vitreous china sanitary ware
By 1948 was controlled by American Radiator and Standard Sanitaryware Corporation 
1956 Patent - Improvements in or relating to fuel magazines for boilers.
1956 Patent - Improvements in or relating to hot water boilers.
1961 Manufacturers of boilers, radiators, heating accessories and plumbing fixtures. Also manufacture sanitary appliances in vitreous china. 2,500 employees.
After this was presumably Ideal-Standard