Archie Stirling Scotland and England. His sister Hannah is married to Robert Michael James Gascoyne-Cecil, 7th Marquess of Salisbury. Stirling's first wife was Charmian Rachel Montagu Douglas Scott (18 July 1942 – 5 April 2009). They married on 11 November 1964 and were divorced in 1977. She was the niece of Princess Alice, Duchess of Gloucester and the granddaughter of John Montagu Douglas Scott, 7th Duke of Buccleuch. The couple had two sons, William Rory Alexander Stirling, born on 15 December 1965, and Ludovic David Stirling, born on 29 April 1967. Stirling was married to actress Dame Diana Rigg for eight years,
Applications of the Stirling engine be the only widely deployed commercially successful Stirling devices. A Stirling heat pump is very similar to a Stirling cryocooler, the main difference being that it usually operates at room temperature. At present, its principal application is to pump heat from the outside of a building to the inside, thus heating it at lowered energy costs. As with any other Stirling device, heat flow is from the expansion space to the compression space. However, in contrast to the Stirling "engine", the expansion space is at a "lower" temperature than the compression space, so instead of producing work, an "input" of