The EPA has set a new standard for air conditioning systems, including central air and mini-split ductless systems. They are raising the bar for AC energy efficiency with the goal of being more environmentally friendly. Starting January 2025, the Global Warming Potential (GWP) ratings must be 750 or less for air conditioning units. The new units feature an improved refrigerant that will greatly decrease the emissions of greenhouse gases. Residential and light commercial air conditioners and heat pumps manufactured after January 1, 2025 must use new refrigerants, commonly referred to as A2Ls. Ultimately this will have a positive impact for our planet, but a not so positive impact on the cost of installing a new air conditioning system.