R-32 (A2L)
R-32 PT Chart
The full R-32 pressure-temperature reference table, from -20 to 130°F. R-32 is a pure single-component refrigerant, so the chart is one saturation column with zero glide. Checked cell by cell against 3 other published tables, 2 of them separate publishers: Weitron, Arkema and CoolProp. Two of them, Weitron and Arkema, have full columns on file here, so this chart prints where those tables and ours disagree at every pressure instead of quietly picking one. The widest gap anywhere on it is 0.07 degrees F, against Weitron and Arkema, at 49.3 psig.
R-32 Pressure-Temperature Table
| Pressure (psig) | Sat. Temp (°F) | Publisher spread (°F) |
|---|---|---|
| 26.8 | -20°F | 0 |
| 37.1 | -10°F | 0 |
| 49.3 | 0°F | 0.07 |
| 63.5 | 10°F | 0 |
| 71.5 | 15°F | 0.06 |
| 80 | 20°F | 0 |
| 89.2 | 25°F | 0 |
| 99.1 | 30°F | 0 |
| 109.7 | 35°F | 0.02 |
| 121 | 40°F | 0 |
| 133 | 45°F | 0 |
| 145.9 | 50°F | 0.04 |
| 159.5 | 55°F | 0.02 |
| 174.1 | 60°F | 0.03 |
| 189.5 | 65°F | 0 |
| 205.8 | 70°F | 0 |
| 223.2 | 75°F | 0.01 |
| 241.5 | 80°F | 0 |
| 260.9 | 85°F | 0 |
| 281.3 | 90°F | 0 |
| 302.9 | 95°F | 0.01 |
| 325.7 | 100°F | 0 |
| 349.6 | 105°F | 0.02 |
| 374.9 | 110°F | 0 |
| 401.4 | 115°F | 0 |
| 429.3 | 120°F | 0 |
| 458.6 | 125°F | 0.02 |
| 489.4 | 130°F | 0.02 |
About the spread column. It is the widest gap in saturation temperature between the published tables we hold, at that pressure, on the saturation column. Across this chart the widest is 0.07°F, at 49.3 psig. Our table and 2 other published tables are compared here: 2 are separate publishers. A narrow spread means the charts agree, which is not the same as the charts being right: they are all computed from equations of state fitted to lab data, and no field measurement settles it.
- Checked against Weitron, reprinted as Daikin/Goodman PM-A2LPTC-USA_04-24, within 0.1 psig on every cell it prints [separate publisher]
- Checked against Arkema Forane, all 28 shipped cells within 0.1 psig [separate publisher]
- Checked against CoolProp-derived tables, identical at all four anchor points [same model]
Weitron's grid steps 2 degrees F to 100, so it does not print our odd-temperature cells. Arkema's does print every one of them.
Weitron is the publisher and Daikin the reprinter, which that document's own footer states, so it is not an OEM source despite the branding. R-32 is a pure component whose saturation curve traces to one reference equation of state wherever it is printed, so these are additional publishers rather than additional models.
A separate publisher can catch a transcription, edition or rounding error. A cross-check marked same model resolves to the same equation of state as the base table, so it is a consistency check rather than independent confirmation. One marked same printing prints numbers identical to another table listed here, so the two are one witness and we do not count them twice. Sources last re-verified 2026-08-05.
Read the low-side (suction) pressure and find its saturation temperature for superheat, and read the high-side (liquid) pressure and its saturation temperature for subcooling. The chart is in psig (gauge) and °F. To convert: kPa gauge = psig × 6.895; °C = (°F − 32) / 1.8.
R-32 PT Chart FAQs
What is the R-32 pressure at 40F and 100F?
On the R-32 PT chart, 40F saturation is about 121 psig and 100F is about 326 psig. Because R-32 is a pure single-component refrigerant with zero glide, that same saturation temperature is used for both superheat (suction) and subcooling (liquid); there is no separate bubble and dew point.
Is the R-32 PT chart the same as R-410A?
No. Suction pressures are close, but R-32 runs a higher head: about 9 to 13 psig above R-410A at the same condensing temperature. Reading an R-32 system on an R-410A scale skews the high side. Use the R-32 column.
Does the R-32 PT chart have glide (bubble and dew)?
No. R-32 (difluoromethane) is a pure single compound, so it boils and condenses at one temperature for a given pressure. The chart is a single saturation column. Zeotropic blends like R-454B or R-407C are the ones with a bubble and a dew temperature at each pressure.
What units is this R-32 PT chart in, and how do I convert to kPa or Celsius?
The table is in psig (gauge pressure) and degrees Fahrenheit, the field-standard units in North America. To convert pressure to kPa (gauge), multiply psig by 6.895. To convert temperature to Celsius, use C = (F - 32) / 1.8. For example, 100F is about 37.8C and 326 psig is about 2,247 kPa gauge.
Related R-32 Tools
Intry Verified. The R-32 pressure-temperature table and its saturation anchors on this page are the locked, second-sourced R-32 PT data, re-checked against those locked values on every build. Those figures are computed by a locked engine straight from the source it cites, not hand-typed, and that computation re-runs inside a deterministic test on every deploy. Source-checked. Locked. This is our own deterministic gate, not a third-party audit. What Intry Verified means
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