Is there a refrigerant that can be mixed with R-22?

Author: Prof. Raoul Terry V  |  Last update: Sunday, April 19, 2026

You should not mix R-22 with any other refrigerant. However, some systems can support EITHER R-22 refrigerant OR R-410A refrigerant. It depends on the system, and you may need to look at your system's specification sheet to see if your system is compatible with another refrigerant.

What refrigerant can I mix with R-22?

Rs44b can be mixed with r22.

Can you mix 407C refrigerant with R-22?

Mixing R22 with R407C

According to the 609 EPA rule, mixing refrigerants is illegal and anybody caught doing so will be heavily fined.

Which Freon is compatible with R-22?

Freon MO99 is the closest capacity match to R-22, compared with most other no-oil change refrigerants.

What happens if you mix R-22 with another refrigerant?

R-22 systems are typically about 300 psi maximum. If you add R-22 to an R-134a system, you will not get close to the rated cooling capacity of the A/C system. In conclusion, do not mix R-22 with R-134a refrigerants, you will ruin the charge, and possibly seriously damage or destroy your A/C system.

Best replacement for r22 refrigerant gas in refrigeration and air-conditioning

What refrigerant can I use to top off R-22?

Freon™ MO99 can be used to retrofit R-22 heat pumps .

Can I mix R-22 and R-410A?

No, you cannot. To make a short story long, R410A and R22 are refrigerants. They are both good refrigerants and they both work, but they have to be charged in the system at different pressures. R410A is a higher pressure system and R22 is a lower pressure system.

What refrigerant is drop in replacement for R-22?

The information below will try to dispel some of these myths. Arkema recommends using Forane® 427A (R427A) - The EASY RETROFIT™ for your r-22 retrofit solution. When it comes to drop-ins, the truth is that there are none. The hope of “drop-in” refrigerants has become common over the years.

How much does it cost to convert R-22 to R-410A?

How much will an R-22 to R-410A conversion cost? The actual cost will depend on many things, including where you live, but most of the time R-22 conversions start at around $2,000 and go up from there. The higher end of that range is somewhere around $4,500 to $4,600.

Can you put R134a in a R-22 system?

No, the compressor will fail. These two refrigerants have very different properties. One of R22 and R134a is high pressure and the other is low pressure. They don't mix chemically and don't have the same boiling point, leading to inefficiencies and eventual compressor failure.

Can you mix 404A and R-22?

No ,R404A works at higher pressure and is much better in absorbing and releasing heat .

What is the replacement refrigerant for R-22 and R-407C?

Features and Benefits. 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.

Is it legal to mix refrigerants?

Some contractors mix refrigerants because they're trying to save money. By mixing different types of refrigerants, they can use a cheaper refrigerant to top off your system. This is not only illegal, but it's also bad for your system and the environment.

Can you put 407C in a R-22 unit?

Using these retrofit guidelines, many R-22 systems can be retrofitted for use with Freon™ 407C in air conditioning, heat pump applications, and refrigeration applications to allow existing equipment to continue to operate safely and efficiently, even after R-22 is no longer available.

What has the refrigerant R-22 been replaced with?

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.

Is it legal to add R-22 refrigerant?

As of January 1, 2020, production and import of R22 refrigerant will be illegal in the United States. Of course, continued use of your air conditioner (AC) or heat pump system using R22 refrigerant is allowed.

What would happen if R-410A was added to an R-22 system?

A NJ Tech Explains. The answer: No. Putting R-410A refrigerant into an AC unit that was designed to use R-22 will cause the unit to die soon after it tries to run.

How much is R-22 Freon per pound?

R-22 refrigerant prices range from $90 to $250 per pound. Since you'll need between 6 and 12 pounds to refill a home AC, costs can reach between $660 and $2,400 for a refill of R-22 refrigerant.

What can I use instead of R-22?

Freon™ MO99 refrigerant is a relatively affordable and eco-friendly alternative for R22 air conditioners. You can use it to revive older systems with little to no refrigerant charge, as well as systems that need replacement components.

Can you mix R-22 with any other refrigerant?

With the R22 phase out in 2020 due to its environmental impact, this is a common question for those looking to upgrade their system or change the refrigerant in their system. The answer is no, refrigerants should not be mixed.

What refrigerant can be used with R-22?

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.

Can I still buy R-22 refrigerant?

A refrigerant may also be responsible for heating air if you have a heat pump system. R22 refrigerant has been an important component of air conditioners in homes and offices for years. But as of 2020, it's prohibited in the U.S..

Can you use the same line set from R-22 to 410A?

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.

Which refrigerants can be mixed?

You're wondering if you can mix different refrigerants for your air conditioning system. The short-long-only answer is no, never. There are many reasons why it's impractical, illegal, and not economical for a homeowner to mix refrigerant types.

Is R-410A being phased out?

Understanding the Current HVAC Refrigerant Guidelines

Most HVAC brands have started to swap out their older AC and heat pump units over the year, preparing for the 2025 deadline, when they will have to completely stop the production of systems with R-410A.

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