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.
Charles Gilbert Gates
Charles Gilbert Gates (May 26, 1876 – October 29, 1913) of Minneapolis, Minnesota, who had owned the first home in the United States where air conditioning was installed in 1914. He was the son of John Warne Gates, also known as "Bet-a-Million" Gates.