HFC / HFO blends Solstice® L41y (R-452B)

R-452B is a non azeotropic blend containing refrigerants from the hydrofluoro-olefin (HFO) family, designed to replace R-410A in new installations, particularly in heat pumps, commercial rooftop air conditioners, VRF systems and medium pressure liquid coolers (air/water chillers).


This new refrigerant produced by Honeywell offers many advantages over R-410A and R-32:



  • It has the same operating pressure as R-410A, eliminating the need to redesign piping, brazing and packaging systems.
  • It offers a lower mass flow than R-410A, which implies a 10 to 15% lower load compared to the existing equipment.
  • It outperforms R-32 in heating mode and high ambient temperature conditions due to its higher critical temperature (77,1°C) and wider operating range at lower evaporating temperatures.

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R32 is a low GWP "hydrofluorocarbon" (HFC). It is an A2L Refrigerant meaning it is mildly flammable. It is used in small split Air Conditioning systems where the charge size complies with the requirements of EN378.

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R-410A is a near azeotropic blend mainly used in new air conditioning systems.

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