Timeline of United States inventions (1890–1945)
Air conditioning is the cooling and de-humidification of indoor air for thermal comfort. Using a system of coils as a solution to cool and remove moisture from muggy air in a printing plant that was wrinkling magazine pages, Willis Carrier invented and manufactured the world's first mechanical air conditioning unit in 1902. Carrier's invention – encompassing the first system to provide man-made control over temperature, humidity, ventilation and air quality, was first installed as a solution to the quality problems experienced at a Brooklyn printing plant, Sackett-Wilhelms Lithographing and Publishing Company. Air conditioning not only spawned a company and an industry, but also brought about profound economic, social and cultural changes.
Joseph James Coleman
Joseph James Coleman FRSE (often referred to simply as J. J. Coleman) (1838–1888) is credited with invention of a mechanical dry-air refrigeration process first used in the sailing ship ‘’Dunedin’’ and sometimes referred to (as a ship type) as Reefer ships. The process focussed upon the use of compressed air for its chilling effects. The effect, which also led to the development of air-conditioning, is known as the Bell-Coleman effect or Bell-Coleman Cycle.