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.
Seichi Konzo
Seichi "Bud" Konzo (1905 – 1992) was a professor of engineering at the University of Illinois at Urbana-Champaign from 1929-71 and a pioneer in the field of home heating and cooling. He lived in the first air-conditioned house in North America in 1933. His research spanned the decades of the 1920s to the 1990s.