A wide selection of refrigerants

Our systems use a variety of different refrigerants – and we take great care to consider the specifications of the F-gas Regulation as well as current requirements relating to high energy efficiency. This section enables you to explore the properties and specific benefits of the respective refrigerants.

Overview of refrigerants

R134a refrigerant

Given their similar properties, R134a refrigerant has previously been used as a substitute for R12. But what sets them apart and makes R134a the clear winner is its ODP of 0. With a GWP of 1430, it is also more suitable for long-term use under the requirements of the F-gas Regulation.


Components  R-134a
Safety groupA1
ClassificationGroup 2
Volumetric refrigeration capacity100 %
Efficiency100 %
Application areaChillers and heat pumps
Key aspects// Price level
// Availability

Click here for an example of Climaveneta systems from Mitsubishi Electric that are operated with R134a.

R513A refrigerant

R513A not only features an impressive GWP value of 631, this A1 refrigerant is neither toxic nor combustible. R513A can be used as a drop-in refrigerant for R134a, meaning that the system properties of the proven cooling technology do not need to be altered during changeover. This helps make the conversion of existing R134a systems a viable option.


Components    R-134a / R-1234yf
GWP 631
Safety group A1
Classification Group 2
Volumetric refrigeration capacity ~100 %
Efficiency 96-98 %
Application area Chillers and heat pumps
NotesExpected to have more stable price level than R-134a
Key aspects // Market acceptance


Compared with R134a refrigerant, R513A boasts a 55% lower GWP value and a lower risk of additional cost increases. R513A thus represents a good short to medium-term alternative to R134a. Existing R134a units can be converted to accept R513A using screw compressors.

Click here for an example of Climaveneta systems from Mitsubishi Electric that are operated with R513A.

R1234ze refrigerant

R1234ze belongs to the group of HFO (hydrofluorolefine) refrigerants, which are characterised above all by their very low GWP. This means that they are not subject to any restrictions via the F-gas Regulation. However, their volumetric refrigeration capacity is up to 20% lower than that of R134a. Like R32, the HFO refrigerants are classed as A2L and considered mildly flammable.


Components    CF3CH=CHF
GWP 7 / <1
Safety group A2L
Classification Group 2
Volumetric refrigeration capacity 75-80 %
Efficiency ~100 %
Application area Chillers
NotesMin. water outlet temp.: -2°C
Not suitable for very low outdoor temperatures
Key aspects // Unit price
// Indoor installation


R1234ze has a GWP value of 7, falling to less than 1 based on the IPCC V assessment. As a result, it is not subject to the F-gas Regulation. Given the stable availability of refrigerant as well as the stable refrigerant and unit price, customers can opt for R1234ze with confidence. The longer maintenance intervals also serve as an additional benefit.

Click here for an example of RC IT Cooling systems from Mitsubishi Electric that are operated with R1234ze.

R410A refrigerant

R140A is a mixture of two substances, consisting of R125a and R32 in equal measure. Its 50% higher volumetric refrigeration capacity enables a significantly smaller layout of the system components than with R22 refrigerant. In addition, R140A systems feature higher efficiency values than their R22 counterparts.


Components    R-32 / R-125
Composition50 % / 50 %
GWP 2088
Current service life17 years
Safety group A1
Refrigeration capacity 100 %
Power consumption100 %
Efficiency / EER 100 %
Hot gas temperature100 %
Temperature glide<0.2 K
Refrigerant mass flow 100 %
Pressure level -


R410A is a proven and accepted refrigerant that already meets the requirements of the F-gas Regulation for the year 2025. It also offers further benefits such as high system efficiency and low refrigerant charge quantity.

Click herefor an example of Mitsubishi Electric systems that are operated with R410A.

R32 refrigerant

R32 refrigerant (difluoromethane (CH2F2)) has long been used as a component in R410A. Belonging to the group of HFC refrigerants, R32 stands out thanks to its low GWP value of 675 and ODP of 0. Given its very good thermodynamic properties and low GWP, R32 is now used in air conditioning and heat pump systems with relatively small refrigerant quantities.


Components  R-32
Composition100 %
current service life5.2 years
Safety groupA2L
Refrigeration capacity8 % ▲▲
Power consumption6 % ▲▲
Efficiency / EER2 % ▲
Hot gas temperature25 % ▲▲▲
Temperature glide0 K
Refrigerant mass flow-31 % ▼▼
pressure levelSlightly higher than for R410A


Thanks to its low GWP of 675, R32 refrigerant already meets the requirements of the F-gas Regulation for the year 2025. It also enables high system efficiency and a low refrigerant charge quantity. In this way, air conditioning systems that use R32 require approx. 20 to 30% less refrigerant while consuming less energy and delivering a higher power output. And as the lower density enables the use of smaller pipe diameters, the installation requires less material.

Click herefor an example of Mitsubishi Electric systems that are operated with R32.

R454B refrigerant

R454B is a mildly flammable substitute refrigerant for R410A in air conditioning systems featuring displacement compressors and direct evaporation, heat pumps and chillers. This refrigerant is based on HFO technology and boasts a low GWP of 466, with CO2 emissions 78% lower than R410A and 31% lower than R32.


Manufacturer Chemours (XL41)
Components    R-32 /R-1234yf
Composition 68.9 % / 31.1 %
GWP 466
current service life 3.6 years
Safety group A2L
Refrigeration capacity -4 % ▲▲
Power consumption -6 % ▲▲
Efficiency / EER 3 % ▲
Hot gas temperature 7 % ▲▲▲
Temperature glide ~1,5 K
Refrigerant mass flow -21 % ▼▼
pressure level Lower ▼


In terms of their refrigeration capacity, the new products with R454B are almost identical to the air-cooled R410A solutions used to date. However, their efficiency is slightly higher and the refrigerant mass flow is only 80%. This enables a considerable reduction in the refrigerant charge quantity, which further reduces the CO2 equivalent. All components are immediately available and there is no need to redesign the units. In addition, the lower CO2 equivalents enable longer intervals between leak checks.

Click here for an example of Climaveneta systems from Mitsubishi Electric that are operated with R454B.

CO2 refrigerant

Thanks to its extremely low ODP and GWP values, CO2 is a wonderfully environmentally-friendly refrigerant. Given its very good heat transfer coefficient, relative imperviousness to pressure losses and very low viscosity, CO2 boasts a unique set of thermophysical properties.


Components  CO2
Composition100 %
Current service life38 years
Safety groupA1
Refrigerant capacity+19 %
POwer consumption+12 %
Efficiency / EER+8,5 %
Hot gas temperature45 %
Temperature glide0 (pure substance)
Refrigerant mass flow-75 %


One of the key benefits of CO2 is its environmental compatibility. It does not have any ozone depletion potential (ODP) and its global warming potential (GWP) is exactly 1. This natural refrigerant is inexpensive and can also be produced in a variety of ways, e.g. as a by-product of industrial processes.

Click here for an example of Mitsubishi Electric systems that are operated with CO2.