R-410A vs R-22
R-410A
R-22
Key Differences
R-410A runs about 60–65% higher pressure than R-22 at the same saturation temperature, so R-22 components, gauges and hoses are not rated for it. The two also use different oils (POE vs mineral), so an R-22 system can never be topped up or converted with R-410A.
Pressure at common saturation temperatures:
- 0°F: R-410A 48.4 PSIG vs R-22 24.0 PSIG (−24.4 PSI, −39% absolute)
- 40°F: R-410A 118.8 PSIG vs R-22 68.6 PSIG (−50.2 PSI, −38% absolute)
- 70°F: R-410A 201.7 PSIG vs R-22 121.4 PSIG (−80.3 PSI, −37% absolute)
- 100°F: R-410A 318.5 PSIG vs R-22 195.9 PSIG (−122.6 PSI, −37% absolute)
- 120°F: R-410A 419.5 PSIG vs R-22 260.0 PSIG (−159.5 PSI, −37% absolute)
Pressure Comparison Graph
Side-by-Side Pressures (PSIG)
| Temp | R-410A | R-22 | Δ PSIG |
|---|---|---|---|
| -80°F | -6.5 | -9.9 | -3.4 |
| -75°F | -5.1 | -9.1 | -4.0 |
| -70°F | -3.5 | -8.1 | -4.6 |
| -65°F | -1.7 | -7.1 | -5.4 |
| -60°F | 0.2 | -5.9 | -6.1 |
| -55°F | 2.5 | -4.5 | -7.0 |
| -50°F | 5.0 | -3.0 | -8.0 |
| -45°F | 7.7 | -1.3 | -9.0 |
| -40°F | 10.8 | 0.6 | -10.2 |
| -35°F | 14.1 | 2.6 | -11.5 |
| -30°F | 17.8 | 4.9 | -12.9 |
| -25°F | 21.9 | 7.4 | -14.5 |
| -20°F | 26.3 | 10.2 | -16.1 |
| -15°F | 31.2 | 13.2 | -18.0 |
| -10°F | 36.5 | 16.5 | -20.0 |
| -5°F | 42.2 | 20.1 | -22.1 |
| 0°F | 48.4 | 24.0 | -24.4 |
| 5°F | 55.2 | 28.3 | -26.9 |
| 10°F | 62.4 | 32.8 | -29.6 |
| 15°F | 70.3 | 37.8 | -32.5 |
| 20°F | 78.7 | 43.1 | -35.6 |
| 25°F | 87.7 | 48.8 | -38.9 |
| 30°F | 97.4 | 55.0 | -42.4 |
| 35°F | 107.7 | 61.5 | -46.2 |
| 40°F | 118.8 | 68.6 | -50.2 |
| 45°F | 130.6 | 76.1 | -54.5 |
| 50°F | 143.1 | 84.1 | -59.0 |
| 55°F | 156.5 | 92.6 | -63.9 |
| 60°F | 170.7 | 101.6 | -69.1 |
| 65°F | 185.8 | 111.2 | -74.6 |
| 70°F | 201.7 | 121.4 | -80.3 |
| 75°F | 218.6 | 132.2 | -86.4 |
| 80°F | 236.5 | 143.6 | -92.9 |
| 85°F | 255.4 | 155.7 | -99.7 |
| 90°F | 275.3 | 168.4 | -106.9 |
| 95°F | 296.4 | 181.8 | -114.6 |
| 100°F | 318.5 | 195.9 | -122.6 |
| 105°F | 341.9 | 210.8 | -131.1 |
| 110°F | 366.5 | 226.4 | -140.1 |
| 115°F | 392.3 | 242.8 | -149.5 |
| 120°F | 419.5 | 260.0 | -159.5 |
| 125°F | 448.0 | 278.0 | -170.0 |
| 130°F | 478.0 | 296.9 | -181.1 |
| 135°F | 509.5 | 316.7 | -192.8 |
| 140°F | 542.6 | 337.4 | -205.2 |
| 145°F | 577.4 | 359.0 | -218.4 |
| 150°F | 613.9 | 381.7 | -232.2 |
| 155°F | 652.3 | 405.3 | -247.0 |
Frequently Asked Questions
How much higher pressure does R-410A have compared to R-22?
At 70°F, R-410A = 201.7 PSIG vs R-22 = 121.4 PSIG — R-410A runs at about 66% higher pressure. At 130°F head pressure, R-410A = 478.0 PSIG vs R-22 = 296.9 PSIG. This is why R-22 and R-410A equipment are not interchangeable.
Why did R-410A replace R-22?
R-22 is an HCFC that depletes the ozone layer. Under the Montreal Protocol, R-22 production was phased out, banned entirely in the US in 2020. R-410A (an HFC) has zero ozone depletion potential. However, R-410A has a high GWP (2088), and is itself being replaced by R-454B for new equipment.