Dulley, James. Gas Absorption Air Conditioners Are Quiet and Economical To Run. Union News. August 21, 1990. p. 23.

Abstract: This article discusses the advantages of a gas absorption air conditioner compared to an electric central air conditioner. The economical savings will depend on the costs of gas and electricity in the specific area. The other great advantage is the simplistic construction of a gas absorption unit. They are reliable and require little maintenance because there are few moving parts. The gas absorption system uses an ammonia and water solution for the cooling process instead of freon, which is damaging to the environment. Some units have outside gas burners, which can be converted to heating systems during the winter months.