Under strict federal environmental standards and global phased reductions of high-GWP chemicals, R-410A is being replaced primarily by A2L low-GWP refrigerants, most notably R-454B and R-32. These new eco-friendly refrigerants reduce global warming potential by roughly 78% compared to R-410A while improving operating efficiency. Because A2L refrigerants are classified as mildly flammable, new HVAC equipment utilizing them includes built-in safety leak sensors and automatic system shutdown features.
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