What is Refrigerant? Definition: Refrigerant is a compound that can readily absorb heat at one temperature, then compressed to a higher temperature and pressure where it changes phase and discharges the absorbed heat. Refrigerants are what make air conditioning possible. Contained within the coils of an air conditioner, these liquid agents cool and dehumidify indoor air.
For years, the most common refrigerant used in air-conditioning systems was R-22 (Freon). Today, in response to growing environmental concerns, production of Freon and systems using R-22 Freon are being phased out. Meanwhile, 410A (Puron) is leading the industry in systems that use an environmentally friendly alternative to R-22.