“R-32 is 40% more efficient than R-410A, but with only 1/3 of the global warming potential.”
Examination of the use of R-32 refrigerant in PTAC air conditioners
Chemical refrigerants, which transfer heat in cooling systems, such as air conditioners, must balance four key factors: efficiency, greenhouse gas mitigation, flammability and toxicity. These factors inextricablywork together; increasing one of them necessarily means affecting another. For example, to create a more efficient refrigerant, you must either make it flammable or contribute to global warming.
The best chemical refrigerant is the one that optimizes the balance of these four factors— and the best refrigerant at this time is R-32.
Difluoromethane (R-32) is a next-generation air conditioner refrigerant because it offers the perfect balance of all four fac- tors. R-32’s low global warming potential (GWP) is only 1/3 of that of today’s most common window air conditioning refrig- erant, R-410A. High in energy efficiency and low in flammabil- ity and toxicity, R-32 is also a recyclable, non-ozone depleting refrigerant.