HVAC Toolkit

Pressure-Temperature Charts

Saturation P-T data for common refrigerants

Select Refrigerant

HFC / HCFC

R-22 R-32 R-125 R-134a R-143a R-404A Z R-407C Z R-410A R-507A

Low GWP (HFO)

R-449A Z R-454B Z Low GWP R-513A R-1234yf Low GWP R-1234ze(E) Low GWP

Natural

R-290 (Propane) Low GWP R-600a (Isobutane) Low GWP R-744 (CO2) Low GWP R-717 (NH3) Low GWP

Pressure Unit

psig kPa bar kgf/cm²

R-22

Pure
GWP: 1,810
ODP: 0.055
Safety Class: A1

HCFC refrigerant being phased out. Has ozone depletion potential. Common in legacy AC systems.

Quick P-T Lookup

psig

* Results are interpolated from the P-T table data

Pressure Units: psig = Gauge pressure (relative to atmosphere) kPa / bar / kgf/cm² = Absolute pressure

°C °F psig
-50 -58 -10.5
-45 -49 -7.4
-40 -40 -3.8
-35 -31 0.5
-30 -22 5.5
-25 -13 11.3
-20 -4 17.9
-15 5 25.4
-10 14 33.9
-5 23 43.4
0 32 54.0
5 41 65.9
10 50 79.1
15 59 93.6
20 68 109.7
25 77 127.4
30 86 146.8
35 95 168.0
40 104 191.1
45 113 216.2
50 122 243.4
55 131 272.8
60 140 304.6
65 149 338.9
70 158 375.9
75 167 415.6
80 176 458.3
85 185 504.2
90 194 553.3