Refrigerants
General Information
When choosing a refrigerant, dierent aspects must be taken into consideration:
• Legislation (now and in the future)
• Safety
• Application envelope in relation to expected running conditions
• Compressor capacity and eciency
• Compressor manufacturer recommendations & Guidelines
Additional points could inuence the nal choice:
• Environmental considerations
• Standardisation of refrigerants and lubricants
• Refrigerant cost
• Refrigerant availability
R410A
R410A is a HFC blend (R32: 50%; R125: 50%) with a zero Ozone Depletion Potential (ODP=0) and a Global Warming
Potential of 1924/AR5 (2088/AR4). It is a near-azeotropic mixture with a temperature glide less than 0.2 K.
With its high net refrigeration eect coupled to a high density, the R410A has appeared in last decade to be the
preferred refrigerant for use in commercial air conditioners and heat pumps.
R452B
R452B is a HFO/HFC blend (R32: 67%; R125: 7%; R1234yf: 26%) with a zero Ozone Depletion Potential(ODP=0) and a
low Global Warming Potential (GWP: 676/AR5 ; 698/AR4). It is a near-azeotropic mixture with a temperature glide
around 1 K.
R452B has very close capacities versus R410A and due to its very limited discharge temperature dierence it
appears today as the best candidate for a direct drop in of R410A.
R452B is classied A2L with low ammability properties. Please refer to European regulations and directives about
the use of refrigerant of the A2L safety group ( EN378, EN60335). Outside Europe refer to the local regulation.
R454B
R454B is a HFO/HFC blend (R32 :68.9%; R1234yf: 31.1%) with a zero Ozone Depletion Potential (ODP=0) and a low
Global Warming Potential (GWP: 467/AR5; 466/AR4). It is a near-azeotropic mixture with a temperature glide around
1 K.
R454B has very close match to R410A in terms of capacity and discharge temperature dierence, and it oers better
eciencies compared to R410A.
R454B is classied A2L with low ammability properties. Please refer to European regulations and directives about
the use of refrigerant of the A2L safety group (EN378, EN60335). Outside Europe refer to the local regulation
© Danfoss | Climate Solutions | 2021.04 AB288965961751en-001001 | 11
Scroll compressors, DSH090 to DSH600 | Refrigerants