R454A pressure–temperature chart
R454A is a zeotropic blend. Its normal boiling point is -41.4 °C. At the AHRI 540 air-conditioning rating point — 7.2 °C evaporating, 54.4 °C condensing — the saturation pressures are 6.69 and 23.88 bar, a pressure ratio of 3.57. As a zeotropic blend it evaporates and condenses over a range of temperatures at one pressure — a glide of 6.8 K at 0.0 °C — so the dew line (where the last liquid boils off) and the bubble line (where the first vapour forms) are both tabulated. Superheat is measured up from the dew temperature and subcooling down from the bubble temperature; a map's 8.3 K of subcooling is 8.3 K under the bubble line, not the dew line, and this solver reads it so.
Units: SI · US customary
Saturation table, -75 to 75 °C
| Dew °C | Bubble °C | Glide K | kPa abs | bar abs | psig | hfg kJ/kg | ρ liquid kg/m³ | ρ vapour kg/m³ |
|---|---|---|---|---|---|---|---|---|
| -75 | -81.5 | 6.5 | 14.4 | 0.144 | -12.6 | 267.8 | 1337 | 0.71 |
| -70 | -76.5 | 6.5 | 20.2 | 0.202 | -11.8 | 264.5 | 1324 | 0.97 |
| -65 | -71.5 | 6.5 | 27.8 | 0.278 | -10.7 | 261.1 | 1310 | 1.32 |
| -60 | -66.6 | 6.6 | 37.6 | 0.376 | -9.2 | 257.7 | 1297 | 1.75 |
| -55 | -61.6 | 6.6 | 50.1 | 0.501 | -7.4 | 254.3 | 1283 | 2.28 |
| -50 | -56.6 | 6.6 | 65.7 | 0.657 | -5.2 | 250.8 | 1269 | 2.94 |
| -45 | -51.7 | 6.7 | 84.9 | 0.849 | -2.4 | 247.2 | 1256 | 3.74 |
| -40 | -46.7 | 6.7 | 108.4 | 1.084 | 1.0 | 243.5 | 1241 | 4.70 |
| -35 | -41.7 | 6.7 | 136.7 | 1.367 | 5.1 | 239.8 | 1227 | 5.84 |
| -30 | -36.8 | 6.8 | 170.5 | 1.705 | 10.0 | 235.9 | 1212 | 7.20 |
| -25 | -31.8 | 6.8 | 210.5 | 2.105 | 15.8 | 232.0 | 1197 | 8.79 |
| -20 | -26.8 | 6.8 | 257.4 | 2.574 | 22.6 | 227.9 | 1182 | 10.64 |
| -15 | -21.8 | 6.8 | 312.0 | 3.120 | 30.6 | 223.7 | 1166 | 12.79 |
| -10 | -16.8 | 6.8 | 375.2 | 3.752 | 39.7 | 219.3 | 1150 | 15.27 |
| -5 | -11.8 | 6.8 | 447.7 | 4.477 | 50.2 | 214.8 | 1134 | 18.12 |
| 0 | -6.8 | 6.8 | 530.4 | 5.304 | 62.2 | 210.0 | 1117 | 21.38 |
| 5 | -1.8 | 6.8 | 624.3 | 6.243 | 75.9 | 205.1 | 1100 | 25.10 |
| 10 | 3.2 | 6.8 | 730.4 | 7.304 | 91.2 | 200.0 | 1082 | 29.35 |
| 15 | 8.3 | 6.7 | 849.6 | 8.496 | 108.5 | 194.6 | 1063 | 34.18 |
| 20 | 13.3 | 6.7 | 983.0 | 9.830 | 127.9 | 188.9 | 1044 | 39.68 |
| 25 | 18.4 | 6.6 | 1131.7 | 11.317 | 149.4 | 183.0 | 1024 | 45.93 |
| 30 | 23.5 | 6.5 | 1297.1 | 12.971 | 173.4 | 176.6 | 1003 | 53.05 |
| 35 | 28.6 | 6.4 | 1480.2 | 14.802 | 200.0 | 169.9 | 980 | 61.19 |
| 40 | 33.8 | 6.2 | 1682.6 | 16.826 | 229.3 | 162.7 | 957 | 70.52 |
| 45 | 38.9 | 6.1 | 1905.8 | 19.058 | 261.7 | 155.0 | 932 | 81.28 |
| 50 | 44.1 | 5.9 | 2151.4 | 21.514 | 297.3 | 146.5 | 905 | 93.77 |
| 55 | 49.4 | 5.6 | 2421.5 | 24.215 | 336.5 | 137.3 | 875 | 108.45 |
| 60 | 54.7 | 5.3 | 2718.5 | 27.185 | 379.6 | 126.9 | 843 | 125.96 |
| 65 | 60.1 | 4.9 | 3045.3 | 30.453 | 427.0 | 115.2 | 806 | 147.34 |
| 70 | 65.6 | 4.4 | 3405.9 | 34.059 | 479.3 | 101.4 | 762 | 174.47 |
| 75 | 71.3 | 3.7 | 3807.1 | 38.071 | 537.5 | 84.2 | 707 | 211.31 |
Pressures are absolute in kPa and bar, gauge in psig (at 101.325 kPa atmospheric); hfg is the latent heat of vaporisation at the dew pressure; densities are saturated liquid and saturated vapour. Computed with CoolProp 8.0.0, the open-source property library the solver runs on, sampled every 0.5 K and printed every 5 K — the same tables the builder reads when it solves a circuit on R454A.
R454A compressors in the catalog
307 compressor maps run on R454A, each a page with its AHRI 540 / EN 12900 map across the published envelope, and each selectable in the builder. Read any of them at your own evaporating and condensing temperatures →
- Copeland — 214 maps: YF (38), YB (30), YS (14), YBD (13), 3YF (6), 2YA (4), 2YL (4), 3YFDS (4), 4YANF (4), 4YBXF (4), 4YCNF (4), 4YENF (4)
- Danfoss — 93 maps: MTZ (55), MLZ (28), LLZ (10)
The largest at the air-conditioning point
- Danfoss MTZ160-3 (R454A hermetic reciprocating, 60 Hz) — 44.4 kW at 7.2 / 54.4 °C
- Danfoss MTZ160-4 (R454A hermetic reciprocating, 60 Hz) — 44.4 kW at 7.2 / 54.4 °C
- Danfoss MTZ160-4 (R454A hermetic reciprocating, 50 Hz) — 37.2 kW at 7.2 / 54.4 °C
- Danfoss MTZ125-3 (R454A hermetic reciprocating, 60 Hz) — 35.6 kW at 7.2 / 54.4 °C
- Danfoss MTZ125-4 (R454A hermetic reciprocating, 60 Hz) — 35.6 kW at 7.2 / 54.4 °C
- Danfoss MLZ076T2C (R454A scroll, 60 Hz) — 33.1 kW at 7.2 / 54.4 °C
- Danfoss MLZ066T2C (R454A scroll, 60 Hz) — 30.5 kW at 7.2 / 54.4 °C
- Danfoss MTZ125-4 (R454A hermetic reciprocating, 50 Hz) — 29.7 kW at 7.2 / 54.4 °C
- Danfoss MTZ100-3 (R454A hermetic reciprocating, 60 Hz) — 27.7 kW at 7.2 / 54.4 °C
- Danfoss MTZ100-4 (R454A hermetic reciprocating, 60 Hz) — 27.7 kW at 7.2 / 54.4 °C
Open the R454A chart in the app — the pressure–temperature line drawn, readable at any point, with a compressor's envelope over it — or open the builder and draw a circuit on R454A: the solver finds its evaporating and condensing temperatures from the coils and the compressor's map.