HVAC · PT Chart

R-410A PT Chart

Pressure–temperature saturation chart for R-410A. Convert pressure to saturation temperature and back, or print the full table.

Convert

Gauge pressure

psig

Blend: use the dew value for suction (superheat) and the bubble value for liquid (subcooling).

R-410A saturation

40°F

Sat temp (dew)

40°F

Sat temp (bubble)

40°F

R-410A saturation table

psig at sea level · A1

Temp (°F)	Bubble (psig)	Dew (psig)
-40	11	11
-38	12.4	12.4
-36	13.7	13.7
-34	15	15
-32	16.3	16.3
-30	17.6	17.6
-28	18.9	18.9
-26	20.3	20.3
-24	21.8	21.8
-22	23.3	23.3
-20	25	25
-18	26.8	26.8
-16	28.8	28.8
-14	30.9	30.9
-12	33.1	33.1
-10	35.4	35.4
-8	37.8	37.8
-6	40.3	40.3
-4	42.8	42.8
-2	45.4	45.4
0	48	48
2	50.6	50.6
4	53.4	53.4
6	56.1	56.1
8	59	59
10	62	62
12	65	65
14	68.1	68.1
16	71.3	71.3
18	74.6	74.6
20	78	78
22	81.5	81.5
24	85.1	85.1
26	88.9	88.9
28	92.8	92.8
30	96.8	96.8
32	100.9	100.9
34	105	105
36	109.3	109.3
38	113.6	113.6
40	118	118
42	122.5	122.5
44	127.1	127.1
46	131.9	131.9
48	136.9	136.9
50	142	142
52	147.3	147.3
54	152.8	152.8
56	158.4	158.4
58	164.1	164.1
60	170	170
62	176	176
64	182	182
66	188.2	188.2
68	194.6	194.6
70	201	201
72	207.5	207.5
74	214.2	214.2
76	220.9	220.9
78	227.9	227.9
80	235	235
82	242.4	242.4
84	250	250
86	257.9	257.9
88	265.9	265.9
90	274	274
92	282.3	282.3
94	290.7	290.7
96	299.3	299.3
98	308	308
100	317	317
102	326.2	326.2
104	335.6	335.6
106	345.2	345.2
108	355	355
110	365	365
112	375.1	375.1
114	385.2	385.2
116	395.7	395.7
118	406.5	406.5
120	418	418
122	430.2	430.2
124	443.2	443.2
126	456.7	456.7
128	470.7	470.7
130	485	485
132	499.8	499.8
134	515.3	515.3
136	531.2	531.2
138	547.2	547.2
140	563	563

Bubble vs. dew — how to read a blend

R-410A is a refrigerant blend, so it boils and condenses across a small temperature range (glide of ~0.2 °F (negligible)) rather than at a single point. The bubble line is where liquid starts to boil; the dew line is where the last vapor condenses. For charge checks: use the dew temperature for superheat on the suction line, and the bubble temperature for subcooling on the liquid line.

Frequently asked

What pressure should R-410A run at?

It depends on the saturation temperature you are targeting, not a single number. Read your gauge pressure, convert it to a saturation temperature with the chart above, then compare it to your line temperature for superheat or subcooling.

Does R-410A have temperature glide?

R-410A is a near-azeotrope with glide of ~0.2 °F (negligible). Use the dew (vapor) temperature for superheat on the suction line and the bubble (liquid) temperature for subcooling on the liquid line.

Is this R-410A PT chart accurate for charging?

Use it for field reference. Values come from published saturation data; still confirm against the equipment nameplate and manufacturer data for final charging.

Sources & references

CoolProp — open-source thermophysical property library used to generate the saturation curves
EPA Section 608 — refrigerant handling and the venting prohibition
ASHRAE Handbook — Fundamentals — refrigerant and psychrometric property basis

Estimates for planning purposes only. Verify all results against the code edition adopted in your jurisdiction and with your Authority Having Jurisdiction (AHJ). This tool is not a substitute for a licensed HVAC contractor. See our methodology, sources, and code editions.