FARMINGTON, Conn. — This past December marked the 100th anniversary of the Rational Psychrometric Formulae, the cornerstone of all fundamental calculations in the air conditioning industry, developed by inventor Willis Carrier, Ph.D., founder of Carrier. Carrier is a part of UTC Climate, Controls & Security Systems, a unit of United Technologies Corp.
Less than a decade after inventing modern air conditioning in 1902, Carrier’s research and development efforts came together in the document, the Rationale Psychrometric Formulae. The document helps determine the precise correlation between temperature and humidity to create a comfortable environment year-round.