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.
Marcel Audiffren
Marcel Audiffren, was a French priest, physicist, and inventor who promoted the residential refrigerator. He served as abbot of his Cistercian monastery, and originally designed a hand-cranked device for cooling liquid, such as wine, for his monks.