YELLOW JACKET offers a wide range of HVAC/R service tools that are A2L compatible…from recovery machines, vacuum pumps, leak detector, refrigerant charging scale, the YJACK® series of wireless probes to a large variety of manifolds.ASHRAE defines A2L refrigerants (HFO-1234yf and HFO-1234ez) as a widely used class of refrigerants featuring:· Low global warming potential (low GWP)· Low flammability· Zero ODP· Lower ToxicityWhile A2Ls are mildly flammable, they are less flammable than Class 3 refrigerants and are safe when handled properly.


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