Willis Carrier
Willis Haviland Carrier (November 26, 1876 – October 7, 1950) was an American engineer, best known for inventing modern air conditioning. Carrier invented the first electrical air conditioning unit in 1902. In 1915, he founded Carrier Corporation, a company specializing in the manufacture and distribution of heating, ventilation, and air conditioning (HVAC) systems.
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.