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Freon™ MO59 refrigerant

» Freon™ MO59 refrigerant in the United States
» Freon™ refrigerants solutions in Europe

Freon™ MO59 (R-417A) is a cost-effective, non-ozone-depleting HFC retrofit refrigerant for R-22 in direct expansion stationary air conditioning and medium-temperature commercial refrigeration systems.

» Freon™ MO59 Case Histories
» New for Asia Pacific customers: 
   Freon™ MO59 Retrofit Training Module


R-417A; A1 Safety Classification




  • Residential and commercial AC systems
    Note: For water chillers, Freon™ MO29 is recommended 
  • Medium-temperature commercial refrigeration, including:
    • food service
    • supermarket display cases
    • food storage and processing


  • Provides efficient, cost-effective retrofits
  • Non-ozone-depleting HFC
  • In most cases, no change of lubricant type during retrofit is required--compatible with traditional and new lubricants
  • Enables continued use of existing equipment
  • Can be topped off during service without removing the entire refrigerant charge


  • Significantly lower discharge temperature and pressure vs. R-22; likely to prolong the life of the compressor
  • In most systems, provides required cooling capacity
  • Has been shown to offer energy savings in some systems

Phaseout Schedule 
Freon™ MO59 is a non-ozone-depleting substance (ODS) and, therefore, is not subject to phaseout under the Montreal Protocol regulations.


Lubricant Recommendation
Freon™ MO59 is compatible with traditional and new lubricants--mineral oil (MO), alkylbenzene (AB), and polyol ester (POE)--in most cases, no change of lubricant type during retrofit is required.