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» R-22 Replacement


There are potentially 3 possible R-22 retrofit options available, ISCEON® MO29, ISCEON® MO59 and ISCEON® MO99.

ISCEON® MO29 

ISCEON® MO29DuPont™ ISCEON® MO29 has been the most widely used R-22 retrofit option in Europe since 2006. ISCEON® MO29 can provide a cooling capacity close to R22 for air conditioning, medium and low temperature refrigeration applications. In a small number of cases the higher mass flow experienced with ISCEON® MO29 may require a change of orifice or expansion valve to achieve the optimum performance post retrofit. For many direct expansion (DX) systems ISCEON® MO29 may be used with mineral, alkyl benzene or POE based lubricants and operates with a compressor discharge temperature significantly less than R-22 which may be beneficial for compressor operation.

ISCEON® MO59 

DuPont™ ISCEON® MO59 was the first non-ozone depleting R-22 retrofit option to be commercialised in 1998 but was largely superseded by the introduction of ISCEON® MO29. It has a lower cooling capacity than ISCEON® MO29 but a superior energy efficiency as well as pressures lower than both ISCEON® MO29 and R-22 and so has continued to be used in applications where energy efficiency has been more important than cooling capacity or where lower condensing pressures are a benefit. As with ISCEON® MO29, in many (DX) systems ISCEON® MO59 may be used with mineral, alkyl benzene or POE based lubricants and operates with a compressor discharge temperature significantly less than R-22 which may be beneficial for compressor operation.

ISCEON® MO99 

ISCEON® MO99DuPont™ ISCEON® MO99 is the newest addition to the ISCEON® family of refrigerants and has proven to be the most versatile refrigerant for replacing R-22 in direct expansion (DX) commercial and residential air conditioning, medium- and low-temperature commercial refrigeration, and DX water chiller systems with positive displacement compressors. ISCEON® MO99 has a similar cooling capacity to ISCEON® MO29, similar energy efficiency to ISCEON® MO59 and a mass flow close enough to R22 to make it likely that an expansion valve change would not be necessary.  As with all the ISCEON® MO refrigerant range ISCEON® MO99 may be used with mineral, alkyl benzene or POE based lubricants making it the ideal R-22 retrofit choice.

This step-by-step guide is designed to help you select the best DuPont™ ISCEON® refrigerant for your application. Please select an application category: