R-407A is a close match to R-22's capacities and flow rates, making it well suited as a retrofit for R-22 in supermarket and food storage applications. Additionally, R-407A is one of the more energy efficient R-22 retrofit options available for refrigeration applications.
Freon™ 407C is suitable as a replacement for R-22 in medium-temperature (20 to 40 °F [-6.7 to 4.4 °C]) evaporator conditions, but loses capacity at lower temperatures, where higher pressure refrigerants such as Freon™ 404A are recommended.
Heating mode The compressor pressure ratio of R-407C was 0.7% to 9.3% higher than R-22 for the two heating mode test conditions.
The best replacement for R-22 Freon is usually R-407c. It has a very low loss in capacity (0 – 5%) relative to R-22 and is less expensive than many other R-22 replacement refrigerants.
R407A is a HFC blend, used as a replacement for R22 and R404A in low and medium temperature supermarket applications. Due to its moderate Global Warming Potential (GWP) it is also considered as an interim replacement for R404A and R507 in existing and new applications.
R-407A can also be used as an R22 retrofit for medium and low temperature refrigeration systems but is not intended for air-conditioning applications nor recommended for use in systems with flooded evaporators. Overall system capacities and efficiencies of an R-407A retrofit will be similar to those of R-22 for the US.
What are the regulations on R134a, R407C and R410A? The commonly used synthetic refrigerants such as R134a, R407C and R410A have a GWP value higher than 2,500. As a result, their production is being phased out. By 2020, around 40% of the total production of synthetic refrigerants have been phased out.
Freon™ MO29 refrigerant: Extends system life using the same equipment as R-22, so a system with an R-22 leak does not need to be completely replaced or upgraded. Offers similar capacity and efficiency as R-22.
Since R410A refrigerant is charged under higher pressure, charging an R22 system with it will increase the force within the coolant lines. The pressure can become high enough for parts of the system to rupture. At the very least, leaks will occur. Mixing refrigerants is not an option either.
Final answer: Of the provided options, R-407C is the approved 'drop-in' replacement for R-22, commonly used in air conditioning systems.
Mixing R22 with R407C or any other refrigerant. According to the 609 EPA rule, mixing refrigerants is illegal and anybody caught doing so will be heavily fined.
R-407C has the closest capacity to R-22 for air conditioning, while R-407A offers performance similar to R-22 in supermarket refrigeration. R427A is a hybrid blend that mirrors R-22's operating pressures, allowing it to be used in a wider range of systems.
Opteon™ XP20 (R-449C) refrigerant is a hydrofluoroolefin (HFO) option that replaces R-22 and R-407C in residential and commercial air conditioners, as well as direct expansion chillers. It has similar performance and properties to R-22 and R-407C and can be used in both retrofit and new equipment.
Conclusion. R407C can continue to be used in existing systems, provided they remain in good technical condition and are regularly maintained. However, operators should consider transitioning to more environmentally friendly alternatives such as natural refrigerants in the long term.
407C REQUIRES AN OIL CHANGE TO POE OIL WHEN RETROFITTING A R22 SYSTEM! All HFC refrigerants are made to be used with and are only truly miscible with polyolester oil (POE).
Recovery of R-407C requires a cylinder with a service pressure of 300 psig minimum. National Refrigerants, Inc.
R-22 uses simple mineral oil, non-toxic, safe, stable, etc. while R-410a uses a somewhat exotic Poly o Ester (POE) oil typically found in jet turbine engines. The refrigerant used MUST match the oil present in the system, which is one reason why you can't replace the R-22 with R410a in a system.
What refrigerant will replace R-410A in 2025? For whole-home systems, Lennox has chosen 2025 Compliant Refrigerant R-454B due to its excellent performance for ducted systems and zero ozone depletion potential. For mini-splits, we selected R-32, designed to optimize efficiency and reliability in ductless systems.
To retrofit an R-22 system with R-410A system your line set must not be more than 25-50 feet in total distance. If the line set is longer than this, you will have to replace the line set with larger lines.
R-407C has thermodynamic properties that make it a "look alike" replacement for R-22, with compressor capacities and system pressures and temperatures that are similar. The major difference of R-407C is that it has a temperature glide of about 6°C (1 0.8°F) for typical air~ conditioning evaporating temperatures.
Since 2010, the most common R-22 replacement was R-410A, a refrigerant without the ozone-depleting qualities of R-22. Read this article on the refrigerant transition for a more thorough explanation of the reasoning and science behind the change.
Freon™ 407A (R-407A) refrigerant is a reliable, stable, and nonflammable option for low- and medium-temperature refrigeration systems. This non-ozone depleting, hydrofluorocarbon (HFC) refrigerant is a replacement for R-22 and provides a lower global warming potential (GWP) alternative to R-404A and R-507.
R-407A is a close match to R-22's capacities and flow rates, making it well suited as a retrofit for R-22 in supermarket and food storage applications. Additionally, R-407A is one of the more energy efficient R-22 retrofit options available for refrigeration applications.
Freon™ 407C has been a popular R-22 replacement because of its properties, which include: Similar cooling capacity, energy efficiency, and pressures as R-22 in systems. An ability to be topped off after a leak, multiple times, with minimal impact on system performance.
A number of common refrigerants, including R134a, R410A and R407C, will be banned from use in new chillers in the USA from January 1, 2024.