Adopting the principle of heat storage, he combined a heat source, two large hotplates and two ovens into one unit: the AGA Cooker. The cooker was introduced to the United Kingdom in 1929, and was manufactured there under licence in the early 1930s. Its popularity in certain parts of British society (owners of medium to large country houses) led to the coining of the term ‘AGA Saga’ in the 1990s, referring to a genre of fiction set amongst stereotypical upper-middle-class society.