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 Cochrane (engineer)
Charles Cochrane (1835 Dudley, Worcestershire – 1898) was a British engineer. He was a leading authority on blast furnaces.
He secured a patent for dehumidifying air.