R-410A Pressure-Temperature Chart
Tap the saturation curve, edit a value, or scan the table — every view stays in sync. ASHRAE-sourced data for residential and commercial AC work.
For Licensed & Trained HVAC Technicians Only
This checklist is intended exclusively for use by licensed, certified, and trained HVAC professionals. It is not a DIY guide and should not be used by untrained individuals to perform repairs or diagnostics. The purpose of this checklist is to help qualified technicians maintain a consistent, step-by-step workflow so that no critical step is overlooked or skipped during service.
R-410A Saturation Curve
R-32 / R-125 (50/50 by mass) — near-azeotropic blend
Click or tap anywhere on the chart — the cursor snaps to the R-410A saturation curve and stays there until your next click.
Direct Lookup
Edit either field — the other updates instantly. The chart cursor moves in sync.
Lookup Table
Tap any row to highlight that point on the chart.
| Temp (°F) | Pressure (psig) |
|---|---|
| -20 | 26.9 |
| 0 | 48.6 |
| 10 | 61.7 |
| 20 | 78.3 |
| 30 | 96.1 |
| 40 | 118.0 |
| 50 | 141.5 |
| 60 | 169.6 |
| 70 | 199.8 |
| 80 | 235.3 |
| 90 | 273.2 |
| 100 | 317.2 |
| 110 | 364.0 |
| 120 | 417.7 |
| 125 | 446.0 |
| 130 | 475.0 |
| 135 | 506.0 |
| 140 | 539.0 |
| 145 | 573.0 |
| 150 | 610.0 |
How to use this chart
The saturation curve shows the pressure at which liquid and vapor R-410A coexist for a given temperature. In the field, you read this two ways:
- Suction-side superheat: measure suction pressure → look up saturation temperature → subtract from the suction-line temperature. Open Superheat Calculator →
- Liquid-side subcooling: measure liquid pressure → look up saturation temperature → subtract the liquid-line temperature. Open Subcool Calculator →
R-410A is a near-azeotropic blend with a glide of about 0.1 °F — well below table rounding — so a single saturation curve covers both bubble (saturated liquid) and dew (saturated vapor) points for practical service work.
Data source: ASHRAE Handbook of Fundamentals refrigerant property tables.
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