The most commonly used refrigerant for air conditioning is R410A, a blend of hydrofluorocarbons (HFCs) that includes difluoromethane (CH2F2) and pentafluoroethane (C2HF5). R410A is a relatively efficient refrigerant with a low ozone depletion potential (ODP) and a low global warming potential (GWP). However, it is being phased out due to its high cost and flammability.
Here are some other refrigerants that are commonly used for air conditioning:
R22 (chlorodifluoromethane, HCFC-22): R22 was once the most widely used refrigerant for air conditioning, but it is being phased out due to its high ODP and high GWP.
R134a (1,1,1,2-tetrafluoroethane, HFC-134a): R134a is a refrigerant that is commonly used in automotive air conditioning systems. It has a low ODP, but a relatively high GWP.
R404A (a blend of HFCs): R404A is a blend of HFCs that is commonly used in commercial refrigeration and air conditioning systems. It has a relatively low ODP and a low GWP.
R407C (a blend of HFCs): R407C is a blend of HFCs that is commonly used in residential and commercial air conditioning systems. It has a relatively low ODP and a low GWP.
Natural refrigerants: Some natural refrigerants that are commonly used for air conditioning include ammonia, carbon dioxide (CO2), and water. Natural refrigerants have no ODP and no GWP, but they can be less efficient than synthetic refrigerants.
