Air conditioning
Modern air conditioning emerged from advances in chemistry during the 19th century, and the first large-scale electrical air conditioning was invented and used in 1902 by US inventor Willis Carrier. The introduction of residential air conditioning in the 1920s helped enable the great migration to the Sun Belt in the United States.
Chrysler Imperial
The 1953 Chrysler Imperial was the first production car in twelve years to actually have automotive air conditioning, following tentative experiments by Packard in 1940 and Cadillac in 1941. Walter P. Chrysler had seen to the invention of Airtemp air conditioning back in the 1930s for the Chrysler Building, and had ostensibly offered it on cars in 1941-42, and again in 1951-52, but none are known to have been sold in the latter form until the 1953 model year. In actually installing optional Airtemp air conditioning units to its Imperials in 1953, Chrysler beat Cadillac, Buick and Oldsmobile which added air conditioning as an option in the 1953 model year.