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R-410A Pressure Temperature Chart
Interactive PT chart for R-410A. Enter a temperature to find saturation pressure, or enter a pressure to find saturation temperature. R-410A operates at approximately 60% higher pressure than R-22 — pre-loaded and ready for field use.
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R-410A Saturation Data
41 data points| Temperature | Pressure (psig) |
|---|---|
| -40°F | 10.1 |
| -35°F | 13.1 |
| -30°F | 16.4 |
| -25°F | 20.1 |
| -20°F | 24.2 |
| -15°F | 28.7 |
| -10°F | 33.7 |
| -5°F | 39.1 |
| 0°F | 45 |
| 5°F | 51.5 |
| 10°F | 58.6 |
| 15°F | 66.3 |
| 20°F | 74.6 |
| 25°F | 83.6 |
| 30°F | 93.4 |
| 35°F | 103.9 |
| 40°F | 115.2 |
| 45°F | 127.4 |
| 50°F | 140.5 |
| 55°F | 154.5 |
| 60°F | 169.5 |
| 65°F | 185.5 |
| 70°F | 202.6 |
| 75°F | 220.8 |
| 80°F | 240.2 |
| 85°F | 260.9 |
| 90°F | 282.9 |
| 95°F | 306.3 |
| 100°F | 331.2 |
| 105°F | 357.6 |
| 110°F | 385.6 |
| 115°F | 415.4 |
| 120°F | 447 |
| 125°F | 480.5 |
| 130°F | 515.9 |
| 135°F | 553.4 |
| 140°F | 593.2 |
| 145°F | 635.3 |
| 150°F | 679.8 |
| 155°F | 727 |
| 160°F | 776.9 |
Source: ASHRAE Fundamentals. Pressures are gauge (psig) at sea level. Negative values indicate vacuum conditions.
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R-410A Pressure and Temperature Reference Values
R-410A (also sold as Puron, Genetron AZ-20, and Suva 410A) is a 50/50 blend of R-32 and R-125. It replaced R-22 as the dominant residential air conditioning refrigerant and operates at significantly higher pressures.
| Temperature | R-410A (psig) | vs. R-22 (psig) |
|---|---|---|
| 0°F / -18°C | 48 | 30 |
| 20°F / -7°C | 75 | 46 |
| 40°F / 4°C | 115 | 67 |
| 70°F / 21°C | 195 | 115 |
| 100°F / 38°C | 307 | 181 |
| 110°F / 43°C | 376 | 217 |
| 130°F / 54°C | 491 | 292 |
Approximate values. Use the interactive tool above for precise readings. Source: ASHRAE Fundamentals.
Key Facts About R-410A
R-410A has a Global Warming Potential (GWP) of 2,088, compared to R-22 at 1,810, which is why regulatory bodies have targeted it for phase-down.
At 40°F, R-410A saturates at approximately 115 psig — roughly 70% higher than R-22 at the same temperature (67 psig). This requires R-410A-rated copper tubing, fittings, and service equipment.
R-410A is a near-azeotropic blend, meaning it behaves more like a pure refrigerant than a zeotropic blend. Its temperature glide is less than 0.1°F, so it can be charged as a vapor or liquid without fractionation concerns.
Normal R-410A suction pressure for a residential split system at standard ARI conditions (95°F outdoor, 80°F/67°F WB indoor) is approximately 140–150 psig.
The AIM Act phasedown reduced R-410A production and import allowances by 40% in 2024 and continues to ratchet down, making reclaimed refrigerant increasingly important for existing system servicing.
R-410A PT Chart — Frequently Asked Questions
What is the normal operating pressure for R-410A?
R-410A saturation pressures depend on temperature. At common HVAC operating conditions: at 40°F (typical evaporator) R-410A saturates at approximately 115 psig. At 110°F (typical condenser) it saturates at approximately 376 psig. These pressures are roughly 60% higher than R-22 at the same temperatures, which is why R-410A systems require components rated for higher pressures.
Why is R-410A pressure so much higher than R-22?
R-410A is a blend of R-32 and R-125, both of which have higher vapor pressures than R-22. At 40°F, R-410A saturates at about 115 psig while R-22 saturates at about 67 psig — a difference of roughly 70%. This means R-410A equipment must use heavier-gauge copper tubing, higher-pressure rated service valves, and compressors specifically designed for R-410A service. Never use R-22 components on an R-410A system.
Is R-410A being phased out?
Yes. Under AIM Act regulations, R-410A production and import are being phased down in the United States starting in 2025. R-410A has a Global Warming Potential (GWP) of 2,088. New residential and light commercial AC equipment is transitioning to lower-GWP refrigerants, primarily R-454B (GWP 466) and R-32 (GWP 675). Existing R-410A systems can still be serviced and recharged with reclaimed refrigerant.
What refrigerant replaces R-410A?
R-454B (sold as Opteon XL41 and Puron Advance) is the primary EPA-approved replacement for R-410A in new equipment. R-454B has similar operating pressures to R-410A, making system design easier for manufacturers. R-32 is also used as an R-410A replacement in some equipment, particularly from Asian manufacturers. Both operate at pressures close enough to R-410A that the same gauge tools can be used, though refrigerant-specific settings should always be verified.
What is the superheat target for an R-410A system?
Target superheat for R-410A fixed-orifice (piston) systems is typically 10–18°F measured at the suction line near the air handler. TXV (thermostatic expansion valve) systems typically target 8–12°F superheat at the evaporator outlet. To calculate superheat, find the suction pressure on your gauge, look up the corresponding saturation temperature in this PT chart, then subtract that saturation temperature from your actual measured suction line temperature.
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