R455A is a zeotropic blend. Its normal boiling point is -38.6 °C; the critical pressure is 37.4 bar. At the AHRI 540 air-conditioning rating point — 7.2 °C evaporating, 54.4 °C condensing — the saturation pressures are 5.98 and 21.67 bar, a pressure ratio of 3.62. As a zeotropic blend it evaporates and condenses over a range of temperatures at one pressure — a glide of 12.9 K at 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.
| Dew °C | Bubble °C | Glide K | kPa abs | bar abs | psig | hfg kJ/kg | ρ liquid kg/m³ | ρ vapour kg/m³ |
|---|---|---|---|---|---|---|---|---|
| -75 | -88.8 | 13.8 | 12.3 | 0.123 | -12.9 | 247.6 | 1345 | 0.66 |
| -70 | -83.7 | 13.7 | 17.3 | 0.173 | -12.2 | 244.5 | 1332 | 0.91 |
| -65 | -78.7 | 13.7 | 24.0 | 0.240 | -11.2 | 241.4 | 1318 | 1.23 |
| -60 | -73.7 | 13.7 | 32.5 | 0.325 | -10.0 | 238.2 | 1305 | 1.64 |
| -55 | -68.7 | 13.7 | 43.5 | 0.435 | -8.4 | 235.1 | 1291 | 2.14 |
| -50 | -63.6 | 13.6 | 57.1 | 0.571 | -6.4 | 231.8 | 1277 | 2.77 |
| -45 | -58.6 | 13.6 | 74.1 | 0.741 | -4.0 | 228.5 | 1264 | 3.53 |
| -40 | -53.6 | 13.6 | 94.8 | 0.948 | -0.9 | 225.2 | 1249 | 4.44 |
| -35 | -48.5 | 13.5 | 119.9 | 1.199 | 2.7 | 221.8 | 1235 | 5.54 |
| -30 | -43.5 | 13.5 | 149.9 | 1.499 | 7.0 | 218.2 | 1220 | 6.83 |
| -25 | -38.4 | 13.4 | 185.5 | 1.855 | 12.2 | 214.6 | 1205 | 8.35 |
| -20 | -33.3 | 13.3 | 227.4 | 2.274 | 18.3 | 210.9 | 1190 | 10.13 |
| -15 | -28.2 | 13.2 | 276.2 | 2.762 | 25.4 | 207.1 | 1174 | 12.19 |
| -10 | -23.1 | 13.1 | 332.8 | 3.328 | 33.6 | 203.1 | 1158 | 14.57 |
| -5 | -18.0 | 13.0 | 398.0 | 3.980 | 43.0 | 199.0 | 1142 | 17.31 |
| 0 | -12.9 | 12.9 | 472.5 | 4.725 | 53.8 | 194.7 | 1125 | 20.45 |
| 5 | -7.8 | 12.8 | 557.2 | 5.572 | 66.1 | 190.3 | 1108 | 24.03 |
| 10 | -2.6 | 12.6 | 653.1 | 6.531 | 80.0 | 185.6 | 1090 | 28.11 |
| 15 | 2.5 | 12.5 | 761.0 | 7.610 | 95.7 | 180.8 | 1072 | 32.75 |
| 20 | 7.7 | 12.3 | 882.1 | 8.821 | 113.2 | 175.7 | 1052 | 38.03 |
| 25 | 13.0 | 12.0 | 1017.3 | 10.173 | 132.9 | 170.3 | 1032 | 44.03 |
| 30 | 18.2 | 11.8 | 1167.9 | 11.679 | 154.7 | 164.6 | 1012 | 50.85 |
| 35 | 23.5 | 11.5 | 1335.1 | 13.351 | 178.9 | 158.6 | 990 | 58.63 |
| 40 | 28.8 | 11.2 | 1520.1 | 15.201 | 205.8 | 152.1 | 966 | 67.53 |
| 45 | 34.2 | 10.8 | 1724.5 | 17.245 | 235.4 | 145.2 | 942 | 77.75 |
| 50 | 39.6 | 10.4 | 1950.0 | 19.500 | 268.1 | 137.7 | 915 | 89.58 |
| 55 | 45.1 | 9.9 | 2198.5 | 21.985 | 304.2 | 129.5 | 886 | 103.38 |
| 60 | 50.7 | 9.3 | 2472.2 | 24.722 | 343.9 | 120.5 | 855 | 119.72 |
| 65 | 56.3 | 8.7 | 2774.2 | 27.742 | 387.7 | 110.2 | 819 | 139.42 |
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 8.0.1dev, 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 R455A.
342 compressor maps run on R455A, 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 →
Open the builder — draw a circuit on R455A, and the solver finds its evaporating and condensing temperatures from the coils and the compressor's map.