For example, according to the U.S. Environmental Protection Agency, HFC-134a, the most common refrigerant used in MVAC systems today, is a "potent greenhouse gas with a global warming potential ...

CFCs are chlorofluorocarbons linked to ozone depletion. HFC-134a, favored by many fleet owners and operators, is a hydrofluorocarbon which contains no chlorine atom; it therefore has zero ...