R410A is one of the most commonly used refrigerants. It’s patented by Honeywell, and known under several other names such as “AZ-20”, “Genetron R410A”, “Puron”, and so on. It’s the preferred freon for residential air conditioners, replacing the older R22 according to the Montreal Protocol and subsequently phasing out of R22.
To properly use it, you need an R410A PT chart (we also provide you with a printable PDF R410A PT chart at the end of the article). This is a pressure-temperature chart that specifies the saturation pressure for R410A at any given temperature. The R410A PT chart can be used to answer questions like:
What are normal operating pressures for 410A?
What is the pressure of r410a at 72 degrees Fahrenheit?
What should gauge read for 410A?
You can also use the R-410A PT chart to adequately calculate the superheat, total superheat, and subcooling temperatures.
Below you will find two charts: 410A chart for degrees Fahrenheit (°F) and 410A chart for degrees Celsius (°C).
Here is the full 410A PT chart for a liquid state measured on a liquid line at the service valve (after the chart, you can also find useful R410A PT examples and graphs):
410A PT Chart For Degrees Of Fahrenheit (°F)
| Temperature (°F) | Pressure (psig) |
| -60 °F | 0.9 psig |
| -55 °F | 1.8 psig |
| -50 °F | 4.3 psig |
| -45 °F | 7.0 psig |
| -40 °F | 10.1 psig |
| -35 °F | 13.5 psig |
| -30 °F | 17.2 psig |
| -25 °F | 21.4 psig |
| -20 °F | 25.9 psig |
| -18 °F | 27.8 psig |
| -16 °F | 29.7 psig |
| -14 °F | 31.8 psig |
| -12 °F | 33.9 psig |
| -10 °F | 36.1 psig |
| -8 °F | 38.4 psig |
| -6 °F | 40.7 psig |
| -4 °F | 43.1 psig |
| -2 °F | 45.6 psig |
| 0 °F | 48.2 psig |
| 1 °F | 49.5 psig |
| 2 °F | 50.9 psig |
| 3 °F | 52.2 psig |
| 4 °F | 53.6 psig |
| 5 °F | 55.0 psig |
| 6 °F | 56.4 psig |
| 7 °F | 57.9 psig |
| 8 °F | 59.3 psig |
| 9 °F | 60.8 psig |
| 10 °F | 62.3 psig |
| 11 °F | 63.9 psig |
| 12 °F | 65.4 psig |
| 13 °F | 67.0 psig |
| 14 °F | 68.6 psig |
| 15 °F | 70.2 psig |
| 16 °F | 71.9 psig |
| 17 °F | 73.5 psig |
| 18 °F | 40.9 psig |
| 19 °F | 77.0 psig |
| 20 °F | 78.7 psig |
| 21 °F | 80.5 psig |
| 22 °F | 82.3 psig |
| 23 °F | 84.1 psig |
| 24 °F | 85.9 psig |
| 25 °F | 87.8 psig |
| 26 °F | 89.7 psig |
| 27 °F | 91.6 psig |
| 28 °F | 93.5 psig |
| 29 °F | 95.5 psig |
| 30 °F | 97.5 psig |
| 31 °F | 99.5 psig |
| 32 °F | 101.6 psig |
| 33 °F | 103.6 psig |
| 34 °F | 105.7 psig |
| 35 °F | 107.9 psig |
| 36 °F | 110.0 psig |
| 37 °F | 112.2 psig |
| 38 °F | 114.4 psig |
| 39 °F | 116.7 psig |
| 40 °F | 118.9 psig |
| 41 °F | 121.2 psig |
| 42 °F | 123.6 psig |
| 43 °F | 125.9 psig |
| 44 °F | 128.3 psig |
| 45 °F | 130.7 psig |
| 46 °F | 133.2 psig |
| 47 °F | 135.6 psig |
| 48 °F | 138.2 psig |
| 49 °F | 140.7 psig |
| 50 °F | 143.3 psig |
| 55 °F | 156.6 psig |
| 60 °F | 170.7 psig |
| 65 °F | 185.7 psig |
| 70 °F | 201.5 psig |
| 75 °F | 218.2 psig |
| 80 °F | 235.9 psig |
| 90 °F | 274.3 psig |
| 95 °F | 295.0 psig |
| 100 °F | 316.9 psig |
| 105 °F | 339.9 psig |
| 110 °F | 364.1 psig |
| 115 °F | 389.6 psig |
| 120 °F | 416.4 psig |
| 125 °F | 444.5 psig |
| 130 °F | 474.0 psig |
| 135 °F | 505.0 psig |
| 140 °F | 537.6 psig |
| 145 °F | 571.7 psig |
| 150 °F | 607.6 psig |
| 155 °F | 645.2 psig |
You can see that this R410A pressure chart includes high and low side pressures at temperatures ranging from -60 °F to 155 °F. Higher temperature equates to higher pressure.
Here are 4 examples of how you can use this chart:
Example 1: What is the pressure of r410a at 72 degrees Fahrenheit? We can see that at 72°F, the R410A pressure is 208,4 psig.
Example 2: What are 410A pressures on an 85 degree day?
The operating pressure of 410A on an 85 degree day is 254.6 psig.
Example 3: What are 410A pressures on a 70 degree day?
The operating pressure of 410A on a 70 degree day is 201.5 psig.
Example 4: What are 410A pressures on a 65 degree day?
The operating pressure of 410A on 65-degree day is 185.7 psig.
R410A Pressure-Temperature Chart For Degrees Of Celsius (°C)
| Temperature (°C) | Pressure (barA) | Pressure (barg) | Pressure (psig) |
|---|---|---|---|
| -70 °C | 0,36 barA | -0,66 barg | -9,52 psig |
| -68 °C | 0,40 barA | -0,61 barg | -8,85 psig |
| -66 °C | 0,45 barA | -0,56 barg | -8,10 psig |
| -64 °C | 0,51 barA | -0,50 barg | -7,27 psig |
| -62 °C | 0,57 barA | -0,44 barg | -6,37 psig |
| -60 °C | 0,64 barA | -0,37 barg | -5,37 psig |
| -58 °C | 0,72 barA | -0,30 barg | -4,29 psig |
| -56 °C | 0,80 barA | -0,21 barg | -3,10 psig |
| -54 °C | 0,89 barA | -0,12 barg | -1,81 psig |
| -52 °C | 0,98 barA | -0,03 barg | -0,41 psig |
| -50 °C | 1,09 barA | 0,08 barg | 1,11 psig |
| -48 °C | 1,20 barA | 0,19 barg | 2,76 psig |
| -46 °C | 1,33 barA | 0,31 barg | 4,54 psig |
| -44 °C | 1,46 barA | 0,45 barg | 6,46 psig |
| -42 °C | 1,60 barA | 0,59 barg | 8,53 psig |
| -40 °C | 1,76 barA | 0,74 barg | 10,76 psig |
| -38 °C | 1,92 barA | 0,91 barg | 13,15 psig |
| -36 °C | 2,10 barA | 1,08 barg | 15,71 psig |
| -34 °C | 2,29 barA | 1,27 barg | 18,45 psig |
| -32 °C | 2,49 barA | 1,47 barg | 21,38 psig |
| -30 °C | 2,70 barA | 1,69 barg | 24,51 psig |
| -28 °C | 2,93 barA | 1,92 barg | 27,84 psig |
| -26 °C | 3,18 barA | 2,16 barg | 31,38 psig |
| -24 °C | 3,44 barA | 2,42 barg | 35,16 psig |
| -22 °C | 3,71 barA | 2,70 barg | 39,16 psig |
| -20 °C | 4,01 barA | 2,99 barg | 43,41 psig |
| -18 °C | 4,32 barA | 3,30 barg | 47,91 psig |
| -16 °C | 4,65 barA | 3,63 barg | 52,67 psig |
| -14 °C | 4,99 barA | 3,98 barg | 57,70 psig |
| -12 °C | 5,36 barA | 4,35 barg | 63,02 psig |
| -10 °C | 5,75 barA | 4,73 barg | 68,63 psig |
| -8 °C | 6,15 barA | 5,14 barg | 74,54 psig |
| -6 °C | 6,58 barA | 5,57 barg | 80,76 psig |
| -4 °C | 7,03 barA | 6,02 barg | 87,31 psig |
| -2 °C | 7,51 barA | 6,50 barg | 94,19 psig |
| 0 °C | 8,01 barA | 6,99 barg | 101,42 psig |
| 2 °C | 8,53 barA | 7,52 barg | 109,00 psig |
| 4 °C | 9,08 barA | 8,07 barg | 116,95 psig |
| 6 °C | 9,65 barA | 8,64 barg | 125,28 psig |
| 8 °C | 10,25 barA | 9,24 barg | 133,99 psig |
| 10 °C | 10,88 barA | 9,87 barg | 143,13 psig |
| 12 °C | 11,54 barA | 10,53 barg | 152,66 psig |
| 14 °C | 12,23 barA | 11,22 barg | 162,63 psig |
| 16 °C | 12,95 barA | 11,93 barg | 173,03 psig |
| 18 °C | 13,70 barA | 12,68 barg | 183,89 psig |
| 20 °C | 14,48 barA | 13,48 barg | 195,21 psig |
| 22 °C | 15,29 barA | 14,28 barg | 207,02 psig |
| 24 °C | 16,14 barA | 15,13 barg | 219,31 psig |
| 26 °C | 17,02 barA | 16,01 barg | 232,10 psig |
| 28 °C | 17,94 barA | 16,93 barg | 245,41 psig |
| 30 °C | 18,89 barA | 17,88 barg | 259,26 psig |
| 32 °C | 19,89 barA | 18,87 barg | 273,66 psig |
| 34 °C | 20,92 barA | 19,91 barg | 288,62 psig |
| 36 °C | 21,99 barA | 20,98 barg | 304,15 psig |
| 38 °C | 23,10 barA | 22,09 barg | 320,49 psig |
| 40 °C | 24,26 barA | 23,24 barg | 337,02 psig |
| 42 °C | 25,45 barA | 24,44 barg | 354,29 psig |
| 44 °C | 26,70 barA | 25,68 barg | 372,42 psig |
| 46 °C | 27,99 barA | 26,97 barg | 391,09 psig |
| 48 °C | 29,32 barA | 28,31 barg | 410,47 psig |
| 50 °C | 30,71 barA | 29,69 barg | 430,55 psig |
| 52 °C | 32,14 barA | 31,13 barg | 451,34 psig |
| 54 °C | 33,63 barA | 32,61 barg | 472,90 psig |
| 56 °C | 35,17 barA | 34,16 barg | 495,25 psig |
| 58 °C | 36,76 barA | 35,75 barg | 518,39 psig |
| 60 °C | 38,42 barA | 37,41 barg | 542,37 psig |
| 62 °C | 40,13 barA | 39,12 barg | 567,24 psig |
| 64 °C | 41,91 barA | 40,90 barg | 593,02 psig |
| 66 °C | 43,75 barA | 42,74 barg | 619,74 psig |
| 68 °C | 45,67 barA | 44,66 barg | 647,5 psig |
| 70 °C | 47,65 barA | 46,64 barg | 676,28 psig |
As you can, the pressure at a specific temperature is usually given in 3 different units:
- barA. Known as “absolute pressure“; pressure against a perfect vacuum. It’s calculated as Gauge Pressure + Atmospheric Pressure. The standard atmospheric pressure of 101,3 Pa or 14,7 psi is used. Hence, the barA unit is equal to Gauge Pressure + 14,7 psi.
- barg. Used to describe R410A gauge pressure; it’s commonly referred to as “2-bar gauge pressure” in HVAC literature.
- psig. Pounds Per Square Inch (psig) is most commonly used to express pressure levels at a specific temperature for R410A refrigerant. In universal units, 1 psi equals to about 6895 N/m2.
Usually you can get these R410A PT charts with every R410A refrigerant. For some people, using a graph instead of a chart is easier. Here is the Celsius-to-barA graph for R410A:
R410A PT Graph (Celsius-to-barA)
If you’re more comfortable using degrees Fahrenheit, you can also use a Fahrenheit-to-barA graph:
Hopefully these two graphs will help some people to figure out the saturation points for the R410A refrigerant.
R410A PT Chart PDF (Printable PDF For On-Site Use)
As promised, you can get the printable PDF version of the R410A PT chart here if you need it on-site. In the US, you will need this pressure chart in degrees Fahrenheit:
Get Printable R410A PT Chart In Fahrenheit PDF Here
In the rest of the world (Europe, Asia, and so on), you will need this pressure chart in degrees Celsius:
Get Printable R410A PT Chart In Celsius PDF Here
You can print these two charts and carry them along, consulting them when needed. You can check these PT charts for other refrigerants as well:
- R448a PT chart with PDF here.
- R422D PT chart with PDF here.
- R22 PT chart with PDF here.
- R134A PT chart with PDF here.
- R404A PT chart with PDF here.
- R290 PT chart with PDF here.
- R407c PT chart with PDF here.
- R454B PT chart with PDF here.
Related posts:
- R22 PT Chart: Pressure Temperature Chart For -60°F To +155°F
- R134A PT Chart: Pressure Temperature Chart (-49°F To 150°F)
- R404A PT Chart: Pressure Temperature Chart For -49°F To +150°F
- R454B PT Chart: Pressures At -40°F To 150°F Temperatures
- R448a PT Chart: -49°F To 150°F Temperatures (+ Chart PDF)
