Opteon™ XL55 (R-452B) refrigerant

Opteon™ XL55 (R-452B), known as DR-55 during initial development, is a non-ozone depleting, low global warming potential (GWP) hydrofluoro-olefin (HFO) based refrigerant replacement for R-410A in new equipment. Opteon™ XL55 will be the leading low GWP replacement for R-410A as it is easily convertible from R-410A designs while offering the optimal balance of energy performance, ultra-low flammability properties and performance at high ambient temperatures. Commercialization plans for this product are currently being prepared.


Air Conditioning & Heat Pumps

  • Positive displacement, DX air conditioning, and heat pumps
    • Residential, light commercial, commercial
  • Direct replacement for all equipment types designed for R-410A
    • Window units, portables, mini-splits, ducted splits, PTACs, commercial packaged, multi-splits, and others


  • Direct expansion


  • Low GWP: 65% reduction compared to R-410A**
  • Up to 5% energy efficiency improvement compared to R-410A
  • Ultra-low class 2L flammability properties
  • Very close capacity and efficiency match to R-410A
  • R-410A design with minimal changes
  • Very low temperature glide
** Assessment Report 5 (AR5)


Opteon™ XP55 In the News