R-32 Pressure-Temperature Chart
Click the saturation curve, edit a value, or scan the table — every view stays in sync. ASHRAE-sourced data for modern R-32 heat pumps and split systems.
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-32 Saturation Curve
Difluoromethane (HFC, A2L mildly flammable) — single-component
Click or tap anywhere on the chart — the cursor snaps to the R-32 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 | 26.8 |
| 0 | 49.3 |
| 10 | 62.8 |
| 20 | 80.0 |
| 30 | 98.4 |
| 40 | 121.0 |
| 50 | 145.1 |
| 60 | 174.1 |
| 70 | 205.1 |
| 80 | 241.5 |
| 90 | 280.5 |
| 100 | 325.7 |
| 110 | 374.0 |
| 120 | 429.3 |
| 125 | 458.0 |
| 130 | 488.0 |
| 135 | 521.0 |
| 140 | 555.0 |
| 145 | 590.0 |
| 150 | 627.0 |
How to use this chart
The saturation curve shows the pressure at which liquid and vapor R-32 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-32 is a single-component HFC with no temperature glide, so one saturation curve serves both bubble and dew states. It is rated A2L (mildly flammable) — observe manufacturer leak, brazing, and ventilation requirements when servicing R-32 equipment.
Data source: ASHRAE Handbook of Fundamentals refrigerant property tables.
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