What is R-22 and why is it illegal? Full Legal Timeline

R-22, also known as HCFC-22 or Freon®, is a hydrochlorofluorocarbon chemical. It has been widely used in residential and commercial air conditioners and heat pumps for decades. Before newer refrigerants entered the market, it was the industry standard for home and business cooling.

It was manufactured by combining chloroform and hydrogen fluoride, creating a stable refrigerant that was both effective and affordable.

So, why was it banned?

R-22 was banned because it contains chlorine. When released into the atmosphere, it breaks down the Earth’s ozone layer, which protects us from harmful ultraviolet (UV) radiation. Because of its environmental impact, countries around the world agreed to phase out its production and use

That’s why on January 1, 2020, the EPA banned the production and import of new HCFC-22 refrigerant. But homeowners were not required to replace existing HCFC-22 systems.

So, HCFC-22 isn’t illegal to own or use. If your air conditioner still runs on R-22, you can legally keep using it. The ban only applies to the production and import of new R-22 refrigerant

Decoding R-22: What is R 22 refrigerant and why is it now illegal? Learn about the ban and the shift towards greener alternatives.

About 90% of households in the U.S. have an air conditioning unit. We use air conditioning to make our homes comfortable by regulating and maintaining optimum conditions. All air conditioners are equipped with a refrigerant to provide a cooling effect. If your home was built more than a decade ago, there is a high chance that your cooling system is using R22 refrigerant.

Although the refrigerant was widely used in the past years, it is currently banned in the U.S and as of 2020 it is no longer being produced or imported. If your AC system uses R22 and you are not very familiar with it, read on to find out more about it.

What is R22 Refrigerant Used For?

R22 refrigerant has been used in household air conditioners, heat pumps, and other refrigeration appliances. It is used in AC systems to produce the cooling effect. Your AC cannot cool your home if it doesn’t have a refrigerant. Also, a refrigerant is used in heat pumps to heat a home by facilitating the movement of heat from one coil to another. Besides being used as a refrigerant, R22 is also used as a propellant to impart motion in certain machinery and equipment.

Why Is R22 Banned?

R-22 was banned because it damages the ozone layer and contributes to global warming. It can also damage the Earth’s ozone layer if it leaks into the atmosphere. On top of that, it’s a powerful greenhouse gas that contributes to climate change.

Besides that, the other reasons for its getting banned are:

Ozone Layer Damage

R-22 is an HCFC (hydrochlorofluorocarbon), which means it contains chlorine. When AC refrigerant escapes from an old air conditioner, it can eventually reach the upper atmosphere. There, ultraviolet (UV) radiation breaks it apart, releasing chlorine atoms.

Those chlorine atoms destroy ozone molecules, weakening the ozone layer that protects the Earth from harmful UV radiation. In fact, a single chlorine atom can break down thousands of ozone molecules before it becomes inactive.

High Global Warming Potential

Freon also has a Global Warming Potential (GWP) of about 1,800. In simple terms, it traps far more heat in the atmosphere than carbon dioxide. That’s a significant contributor to global warming when released.

The R-22 Phase-Out Timeline

The phase-out of R-22 didn’t happen overnight. It was phased in over several decades under the Montreal Protocol, an international agreement to eliminate chemicals that deplete the ozone layer. Here’s how the transition unfolded.

1987 – The Montreal Protocol

The United States joined countries around the world in signing the Montreal Protocol on Substances that Deplete the Ozone Layer. The treaty committed participating nations to gradually phase out ozone-depleting refrigerants, including HCFC-22.

2010 – New R-22 Equipment Was Banned

Starting in 2010, manufacturers could no longer produce or sell new residential air conditioners and heat pumps that used Freon. So, from then on, newly installed HVAC systems had to use environmentally safer refrigerants, such as R-410A.

2020 – Production and Import Ended

On January 1, 2020, the U.S. Environmental Protection Agency (EPA) officially banned the production and import of new HCFC-22 refrigerant. Existing HCFC-22 systems remained legal to own and operate, but technicians could only recharge them using reclaimed or recycled Freon.

Today – Existing Systems Are Still Legal

If your air conditioner was manufactured before 2010 and still uses R-22, you can continue using it. There is no law requiring homeowners to replace a working R-22 system. However, because the refrigerant supply is now limited, repairs involving Freon have become much more expensive.

2030 – Final HCFC Phase-Out

By 2030, the remaining limited allowances for HCFC refrigerants, including speciality uses of HCFC-22, are scheduled to end. This marks the final step in the complete phase-out of ozone-depleting HCFC chemicals under the Montreal Protocol.

Is it Illegal to Install a New R22 System?

Yes, it is illegal to install a brand-new air conditioner or heat pump that uses R-22 refrigerant. Since 2010, manufacturers have been prohibited from producing new HCFC-22 systems, and HVAC contractors cannot install them as new equipment.

Here’s what the law allows and doesn’t allow:

Situation	Status
New R-22 air conditioners or condensers	Cannot be manufactured, imported, or installed
Replacing your entire HVAC system	Must use a modern refrigerant that meets current environmental regulations
Existing R-22 systems already installed in your home	Can still be repaired and maintained

That means if your older Freon unit develops a leak, an EPA-certified technician can legally repair it and recharge it using reclaimed or recycled R-22. 

Since no new Freon is being produced or imported, recycled refrigerant is the only legal option.

The government banned new Freon installations for a reason. If manufacturers were still allowed to build R-22 equipment, there would always be demand for a refrigerant that harms the ozone layer. 

The main goal was to move the entire HVAC industry toward cleaner, more efficient technology.

The ban also closed a loophole that allowed some manufacturers to sell “dry ship” or “dry charge” units. These air conditioners were shipped without refrigerant and then filled with R-22 during installation. 

Although technically legal at the time, the practice delayed the transition to environmentally friendly refrigerants and was eventually prohibited.

Another reason for the ban was to protect the limited supply of reclaimed R-22. Since older systems still need refrigerant for repairs, lawmakers wanted to reserve the remaining supply for existing homeowners rather than for new installations.

Freon 22 Replacement

If you have a system using R22, you will have a hard time finding the refrigerant in case of leaks or other issues. Even if it is available, it will be very expensive. The good news is that the R22 has a replacement, the R410A. This refrigerant is affordable, environmentally friendly, and easy to use.

Some of the most common alternatives include:

• R-422D (Freon MO29): A popular retrofit option that works with the mineral oil already found in most Freon systems. Because an oil change usually isn’t required, the conversion is often less expensive. However, cooling performance may drop by about 5–10%.
• R-438A (MO99): One of the most widely used R-22 replacements. It closely matches Freon’s cooling performance and operating pressures while allowing most systems to keep their existing oil, making the retrofit simpler.
• R-407C: This refrigerant offers performance very similar to Freon, but converting a system requires a complete oil change to POE oil and a more involved retrofit process.

Retrofitting an older Freon system typically costs a few hundred to several thousand dollars, depending on the equipment, labor, and any parts that need to be replaced.

Before deciding on a retrofit, keep these points in mind:

• Blended refrigerants must be charged into the system as a liquid to ensure the correct refrigerant mixture.
• Older seals, gaskets, and rubber components may begin leaking after the conversion and could need replacement.
• If your system is already nearing the end of its lifespan, replacing it with a modern HVAC system may be more cost-effective than investing in a retrofit.

If you are looking to upgrade your old unit that used R-22, contact The Chill Brother. With our $2,000 buy back program, we will buy your old system for up to $2,000! Call 832-583-2440 to learn more about this offer!

Frequently Asked Questions (FAQ)

Can I still buy R-22 refrigerant?

Yes, but not new R-22. Since 2020, the production and import of new Freon have been banned in the U.S. HVAC technicians can still purchase and use reclaimed or recycled Freon to service existing systems, but supplies are limited and prices continue to rise.

Is R-22 the same as R-410A?

No. R-22 and R-410A are different refrigerants with different operating pressures and lubricating oils. An air conditioner designed for Freon cannot simply be filled with R-410A. Doing so can seriously damage the system.

Can I recharge an R-22 system myself?

No. Handling refrigerants requires EPA certification. Recharging an Freon system also involves finding and repairing leaks, checking system pressure, and charging the correct amount of refrigerant. It’s a job that should be left to a licensed HVAC technician.

How much is a 30-pound cylinder of R-22 worth?

The price varies depending on supply and demand, but a 30-pound cylinder of reclaimed R-22 can cost anywhere from $800 to over $2,000. As supplies continue to shrink, prices are expected to remain high.

What is the cheapest drop-in replacement for R-22?

R-422D (Freon MO29) is often considered one of the most affordable drop-in replacements because it usually works with the existing mineral oil in older Freon systems. However, the best replacement depends on your equipment, and a technician should confirm compatibility before making the switch.

Should I repair my R-22 system or replace it?

If your system only needs a minor repair and is less than 10–12 years old, repairing it may still make sense. However, if it has a major refrigerant leak or requires an expensive recharge, replacing it with a modern system is usually the more cost-effective long-term solution.

How can I tell if my AC uses R-22?

Check the data plate on the outdoor condenser or indoor air handler. The refrigerant type is usually listed as R-22, HCFC-22, or Freon. If your system was installed before 2010, there’s a good chance it uses R-22.