Which refrigerants are considered environmentally benign?

Hydrocarbons, such as propane, are considered environmentally benign refrigerants because they have a low global warming potential (GWP) and do not deplete the ozone layer. Unlike chlorofluorocarbons (CFCs) and hydrochlorofluorocarbons (HCFCs), which are known for their harmful environmental impacts, including ozone depletion and significant contributions to global warming, hydrocarbons offer a more sustainable alternative.

Additionally, propane is readily available, efficient in cooling applications, and has a natural origin, contributing to its classification as environmentally friendly. By utilizing hydrocarbons as refrigerants, the HVAC and refrigeration industries can work towards reducing their environmental footprint, aligning with the goals of energy efficiency and sustainability promoted in LEED standards.