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

bar

* 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 bar
-50 -58 0.3
-45 -49 0.4
-40 -40 0.6
-35 -31 0.8
-30 -22 1.1
-25 -13 1.4
-20 -4 1.8
-15 5 2.2
-10 14 2.7
-5 23 3.3
0 32 4.0
5 41 4.7
10 50 5.6
15 59 6.5
20 68 7.6
25 77 8.7
30 86 10.0
35 95 11.5
40 104 13.0
45 113 14.8
50 122 16.7
55 131 18.7
60 140 21.0
65 149 23.4
70 158 26.0
75 167 28.9
80 176 32.0
85 185 35.3
90 194 38.9