R22 actually outperforms R410A in certain technical ways, particularly in hot climates, but it’s no longer a practical choice. R22 has been phased out of production in the United States since 2020 because it damages the ozone layer, making it scarce and extremely expensive. The real question for most homeowners isn’t which refrigerant is theoretically superior but which one makes sense for their situation today.
Cooling Performance in Normal Conditions
At standard outdoor temperatures around 82°F, the two refrigerants perform almost identically. Testing by the National Institute of Standards and Technology found that R410A systems produced about 2% more cooling capacity than R22 systems at this temperature, with a slightly higher energy efficiency ratio as well. For most of the cooling season in moderate climates, you wouldn’t notice a meaningful difference between the two.
Why R22 Holds Up Better in Extreme Heat
The gap between the two refrigerants widens as temperatures climb. R22 has a critical temperature of 205°F, while R410A’s is only 158°F. The critical temperature is the point beyond which a refrigerant can no longer condense into liquid, and once a refrigerant gets close to that ceiling, its performance drops sharply. Because R410A’s ceiling is lower, it starts losing ground sooner.
The NIST data makes this clear. At 95°F outdoor temperature, R410A’s efficiency was already about 4% lower than R22’s. At 130°F, R410A’s efficiency dropped 15% below R22’s, and its cooling capacity fell 9% short. Over the full temperature range tested, R410A’s efficiency was roughly 2% lower at 77°F and 6.5% lower at 131°F compared to R22.
If you live somewhere that regularly hits triple digits, this is a real disadvantage for R410A. In moderate climates, it’s negligible.
Operating Pressures and Equipment Differences
R410A runs at much higher pressures than R22. On a typical 70°F day, an R410A system’s low side reads around 118 to 135 psi, with high-side pressures in the range of 370 to 420 psi. R22 systems operate at roughly 60% of those pressures. This means every component in an R410A system, from the compressor to the copper lines to the valves, is built heavier to handle the extra stress.
This is why you can’t simply swap one refrigerant for the other. Beyond the pressure difference, R22 systems use mineral oil for compressor lubrication while R410A systems require synthetic polyol ester (POE) oil. Putting R22 into an R410A system, or vice versa, would compromise seals, damage the compressor, and leave you with a broken system. The two refrigerants require entirely different hardware.
Environmental Impact
This is where R22 loses decisively. R22 is a hydrochlorofluorocarbon (HCFC) with an ozone depletion potential of 0.055. That number might sound small, but it was enough for international agreements to mandate its phase-out worldwide. R410A has zero ozone depletion potential, which is the primary reason the industry switched to it.
R410A isn’t perfect environmentally, though. Its global warming potential (GWP) is 1,975, actually higher than R22’s GWP of 1,700. Both are potent greenhouse gases if released into the atmosphere. This is one reason R410A itself is now being phased down in favor of newer refrigerants with GWP values below 700.
Cost Comparison
R22’s phase-out has made it dramatically more expensive. As of 2024, homeowners pay roughly $200 to $250 per pound for R22 recharges, compared to $90 to $120 per pound for R410A. A typical residential system holds 6 to 12 pounds of refrigerant, so a full R22 recharge could cost $1,500 to $3,000 just for the refrigerant. An R410A recharge for the same size system might run $540 to $1,440.
The price gap will only widen. No new R22 is being manufactured in the U.S., so remaining supplies come from reclaimed and stockpiled refrigerant. Every year there’s less of it available.
R410A Is Also Being Phased Out
If you’re replacing an R22 system, it’s worth knowing that R410A’s days are numbered too. The EPA’s Technology Transitions Program will prohibit the installation of new HVAC systems with a GWP above 700 starting January 1, 2026. R410A, with its GWP of 1,975, doesn’t meet that threshold. The industry is shifting to a new class of mildly flammable refrigerants (classified as A2L), such as R454B, which have significantly lower global warming potential.
Equipment purchased now with R410A will still be serviceable for its full lifespan, and R410A won’t face the same supply crunch R22 did since it isn’t being banned outright, just phased down over 15 years. But if you’re buying a new system in 2026 or later, you’ll likely be getting one that uses a next-generation refrigerant instead.
Which One Makes Sense for You
If your existing R22 system still works well and rarely needs refrigerant, keeping it running can make sense for a few more years. But the moment it develops a significant leak or needs a major repair, the math shifts heavily toward replacing the entire system rather than paying premium prices for a dying refrigerant.
For anyone installing new equipment, R410A (or its newer replacements) is the only viable path. R22 may hold a slight edge in raw thermodynamic performance at high temperatures, but that advantage is irrelevant when the refrigerant costs two to three times as much, the supply is shrinking, and the equipment to run it is no longer manufactured. Performance on paper doesn’t matter if the refrigerant is too expensive to put in your system.