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IEC 60335-2-89 flammable refrigerant limit change

FAQ

New charge limits for flammable refrigerants: your questions answered

Earlier in 2019, the International Electrotechnical Commission (IEC) revised its safety standard IEC 60335-2-89, and increased the charge limit for flammable refrigerants in self-contained commercial refrigeration appliances.
This is important news, as the move to low global warming potential (GWP) refrigerants will mean commercial refrigeration will make increasing use of flammable refrigerants like propane (R290) and isobutane (R600a).
However, the change has the potential to cause some confusion. For example, the new charge limits will take effect in different countries at different times, cover some applications but not others, and depend upon the size of a room where the unit can be used. To help, we’ve answered some common questions about the new limits.