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Benjamin Franklin and John Hadley
Explored the principle of evaporation as a means to rapidly cool an object. -
Dr. John Gorrie
ice-making machine that uses compression to make buckets of ice and then blows air over them -
Assassination of President James Garfield
naval engineers build a boxy makeshift cooling unit, which is filled with water-soaked cloth and a fan blows hot air overhead and keeps cool air closer to the ground. -
First modern cooling unit
Willis Carrier invents the Apparatus for Treating Air, which blows air over cold coils to control room temperature and humidity -
The First Home Instillation
7 feet high, 6 feet wide, 20 feet long, the first airconditioner was installed in the mansion of Charles Gates -
H.H. Schultz and J.Q. Sherman
H.H. Schultz and J.Q. Sherman invent an individual room air conditioner that sits on a window ledge -
Central Units
Central home units, consisting of a condenser, coils, and a fan, replace individual units. Air gets drawn, passed over coils, and blasted through a home's ventilation system. -
Freon Switch
Freon, previously used in air conditioning units, is linked to ozone depletion and banned in several countries, resulting in a switch to the coolant R134a by 1996. -
Present Day
non-vapor compression technology is being developed to reduce energy consumption by 50 percent, and stop the use HFCs that harm the environment.
