Opteon™ XL41 (R-454B) is a mildly flammable low global
warming potential (GWP) hydrofluoroolefin (HFO) based
refrigerant to replace R-410A in new equipment designs.
Opteon™ XL41 offers the optimal balance of properties toreplace R-410A in positive displacement, direct expansion
air conditioning, heat pump and chiller applications, or otherend-uses where R-410A has historically been used.
Opteon™ XL41 is the lowest GWP solution for R-410A-like
replacement (78% reduction), and provides improved
performance. Opteon™ XL41 offers similar properties toR-410A which makes it easy and cost-effective to apply in
new equipment without major modifications.

Benefits• Lowest GWP replacement for R-410A (reduction of 78 %)• Comparable capacity and improved efficiency compared toR-410A• Excellent performance in normal and high ambientconditions• Very close match to R-410A – easily convertible fromR-410A design with minimal changes• Very low temperature glide – can be topped off after leaks• Lower toxicity and lower flammability (ISO/ASHRAE 34A2L)• Miscible with POE lubricant
Opteon™ XL41 properties

Opteon™ XL41 is classified as a lower flammability (ISO/ASHRAE Number

ASHRAE class 2L) refrigerant. Please check your local
regulations and Standards such as UL, IEC, or ASHRAE toComposition
Weight %verify the allowable system charge, new equipment design

Molecular Weightand safe handling requirements for the intended application.

Normal Boiling Point¹

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

Critical Pressure

R-454B
R-32/R-1234yf
68.9/31.1
62.6 g/mol-50.5°C (-58.9 °F)
5266.9 kPa (763.9 psia)

Critical Temperature
Liquid Density at 21.1 °C (70 °F)

78.1 °C (172.6 °F)
1001.0 kg/m3 (62.5 lb/ft³)

Ozone Depletion Potential(CFC-11 = 1.0)0AR4 (AR5) GWP (CO2 = 1.0)466 (467)

ASHRAE Safety Classification

A2L

Temperature GlideLower Flammability Limit²
1. Normal bubble point2. ASHRAE Standard 34 - 2022 Addendum A~1.1 K (~2.0 R)
11.5 vol%Opteon™ XL41

Refrigerant

Conditions: 7.2 °C (45 °F) Evap, 46.1 °C (115 °F) Cond, 11.1 K (20 R) Superheat, 5.5 K (10 R) Subcool, 75% efficiency

R-410A

R-454B

Relative Capacity

1.00

0.97

Relative COP

1.00

1.02

Relative Mass Flow

1.00

0.82

Suction Pressure kPa (psia)

999.7 (145.0)

928.9(134.72)

Discharge Pressure kPa (psia)

2802.0 (406.4)

2615.2 (379.3)

Discharge Temperature ºC (ºF)

81.4 (178.6)

87.3 (189.20)

Finding the Right Balance
R-410A (hydrofluorocarbons or HFCs) have served as
the primary replacements to ozone-depleting refrigerants
like R-12 (chlorofluorocarbons (CFCs) & R-22
(hydrochlorofluorocarbons (HCFCs) for almost threedecades. However, R-410A has a relatively high GWP (2088/ AR4 value) and so is the focus of current regulatory efforts
to reduce the environmental impact of refrigerant emissions.
Currently, there are no comparable non-flammable, low GWP
alternatives with pressures close to those of R-410A. Formany existing applications, the industry is adopting lower
flammable (Class 2L) refrigerants (e.g. Opteon™ XL products)

The most recent UL 60335-2-40 and 60335-2-89
equipment standards and field applications under
ASHRAE-15 have completed their evaluation of A2Lsin equipment.

Conclusion
Regulations designed to reduce the impact ofrefrigerant emissions on the environment are leading theair conditioning industry towards the use of flammable
refrigerants. The development of A2L refrigerants (e.g.
Opteon™ XL products) has increased the ability of theindustry to safely meet strict GWP targets in a wider range

to meet future regulatory requirements.

of applications. Extensive research has been carried out toRegulations Accelerating Changeof refrigerants, and how they can be safely applied.

The 2020 passing of the American Innovation andUltimately, successful implementation of flammable

Manufacturing (AIM) Act is accelerating the phasedown ofrefrigerants will depend on properly integrating thehydrofluorocarbon (HFC) refrigerants and increasing theknowledge gained from industry research into codes andimportance of adopting lower GWP refrigerants, including

product/safety standards. In addition, extensive education

those classified as A2L (mildly flammable).

of the industry is required, particularly in the service sector.

Around the globe, the phasedown of HFC refrigerants isprompting a transition toward alternatives with lower global
warming potential (GWP). While A2Ls have been approved
for use in many other parts of the world and are now widelyadopted in commercial refrigeration applications there, theupdate of safety standards is nearing completion within
the U.S.

demonstrate differences between the relative flammability

For refrigerant related support,
contact our Tech2Tech Support Team

866-433-TECH (8324),or email tech2tech@chemours.com

For more information on the Opteon™ family of refrigerants or other refrigerants from Chemours, visit opteon.com
The information set forth herein is furnished free of charge and based on technical data that Chemours believes to be reliable. It isintended for use by persons having technical skill, at their own risk. Since conditions of use are outside our control, we make no warranties,
expressed or implied and assume no liability in connection with any use of this information. Nothing herein is to be taken as a license tooperate under, or a recommendation to infringe any patents or patent applications.
© 2024 The Chemours Company FC, LLC. Opteon™ and any associated logos are trademarks or copyrights of The Chemours Company FC, LLC. Chemours™ and the Chemours Logo aretrademarks of The Chemours Company.
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