The R-22 Phaseout Explained
For decades, R-22 was the default refrigerant in residential and light commercial air conditioning. If you service older equipment, you still run into it constantly — and the EPA 608 exam expects you to understand why it is being eliminated and what replaced it. This article explains the R-22 phaseout in plain language: the reason behind it, the key dates, and how it changes a technician's day-to-day work.
What R-22 Is
R-22, also written HCFC-22, is a hydrochlorofluorocarbon. The "chloro" part is the problem. Like the older CFC refrigerants, R-22 contains chlorine, and when it escapes into the atmosphere it eventually reaches the stratosphere, where ultraviolet light frees that chlorine to destroy ozone. R-22 is less damaging to the ozone layer than the CFCs it replaced, but "less damaging" is not "harmless," and that is why it was scheduled for elimination.
Why It Is Being Phased Out
The phaseout traces back to the Montreal Protocol, the international treaty to protect the ozone layer, which the United States implements through the Clean Air Act. HCFCs like R-22 were always meant to be a transitional refrigerant — a step down from CFCs while better options were developed. Once those options existed, the schedule to retire R-22 took effect.
The Key Dates
Two milestones matter most, and they are worth memorizing because exam questions and real-world service decisions both hinge on them:
- January 1, 2010 — manufacturers could no longer produce or import R-22 for use in new equipment. New air conditioners and heat pumps had to be designed for a different refrigerant from that point on.
- January 1, 2020 — production and import of virgin (newly manufactured) R-22 ended completely in the United States.
After 2020, no new R-22 enters the supply. The only R-22 legally available is what already exists: refrigerant that has been recovered, recycled, and reclaimed, plus stockpiles built up before the cutoff.
What This Means for Servicing Existing Equipment
A common misconception is that R-22 became illegal to use. It did not. It is still legal to operate an existing R-22 system and to service it. What changed is supply and price. Because no new R-22 is being made, the only source for topping off a leaking R-22 system is reclaimed refrigerant, and that has pushed prices sharply higher.
This is exactly why the leak rules and recovery rules in Section 608 matter so much for R-22 equipment. Every pound vented is a pound that cannot be replaced cheaply, and recovered R-22 has real resale value. When you service an R-22 system, recovering carefully is both a legal requirement and simple economics.
Repair, Retrofit, or Replace
When an aging R-22 system fails, the owner generally has three choices:
- Repair the existing system using reclaimed R-22. This works for a relatively new, otherwise healthy unit, but the refrigerant cost makes it less attractive every year.
- Retrofit the system to an approved alternative refrigerant. Retrofits require following the manufacturer's guidance, often changing the lubricant and some components, and they rarely match the original performance.
- Replace the equipment with a new system designed for a current refrigerant. For older units, this is frequently the most practical choice.
What Replaced R-22
For new equipment after 2010, the industry largely moved to R-410A, a hydrofluorocarbon (HFC) blend with no chlorine and therefore essentially no ozone depletion potential. R-407C was commonly used as a retrofit option for existing systems because its operating characteristics are closer to R-22.
The story did not end there. R-410A solved the ozone problem but has a high global warming potential, so it is now itself being phased down under the AIM Act. New equipment is moving to lower-GWP A2L refrigerants such as R-32 and R-454B. In other words, R-22 was replaced by R-410A, and R-410A is now being replaced in turn — a pattern worth understanding for both the exam and your career. See our AIM Act and HFC phasedown guide for what comes next.
Study Takeaways
- R-22 is an HCFC; it contains chlorine and depletes ozone.
- 2010: no new R-22 equipment. 2020: no new R-22 production or import.
- Existing R-22 systems are still legal to run and service — with reclaimed refrigerant only.
- Careful recovery is both required and economically smart for R-22 work.
- R-410A replaced R-22 in new equipment and is now being phased down itself.
Ready to practice? Open the app and run a Core or Type II session, or read the Core study guide for the broader environmental rules.
Not affiliated with the EPA. For study practice only. EPA regulations change over time — always verify current rules with official EPA materials and your testing provider.