HVAC PT Charts
RefrigerantASHRAE R-422A

R422A PT Chart

Updated October 12, 2026

R-422A

A1 Lower toxicity, no flame propagationHFC blend AIM Act HFC
R-422A AHRI Guideline N service cylinderIllustration of a refrigerant cylinder painted light green gray (RAL 7044), the color AHRI Guideline N-2017 calls for on all new refrigerant containers from 2020. Label: R422A, safety class A1, GWP 3,143. No red band: AHRI Guideline N-2017 reserves it for flammable refrigerants.R422AA1GWP 3,143
Illustration of a refrigerant cylinder painted light green gray (RAL 7044), the color AHRI Guideline N-2017 calls for on all new refrigerant containers from 2020[1], section 4.8. Label: R-422A, safety class A1, GWP 3,143. No red band: AHRI Guideline N-2017 reserves it for flammable refrigerants[1], section 4.7.
R-125/R-134a/R-600a (85.1/11.5/3.4)

Ternary HFC blend with hydrocarbon (85.1% R-125 / 11.5% R-134a / 3.4% R-600a). Branded as ISCEON MO79 (Chemours). ASHRAE A1, GWP 3,143. Designed as a mineral-oil-compatible R-502 retrofit for low-temperature commercial refrigeration.

R-422A saturation pressure splits across its glide: dew 84.0 PSIG at 40°F, bubble 242.4 PSIG at 100°F, and 146.7–153.2 PSIG dew-to-bubble at 70°F. Use the dew column for superheat and the bubble column for subcooling. The full table below runs from −40°F to 150°F in 1°F steps.

Not yet checked against an independent source.

Saturation @ 70°F
153.2 / 146.7 PSIG
GWP (100-yr)
3,143 US EPA value, 40 CFR 84.64(b)
Temperature glide
3.1°F
Boiling point
bubble −52.1°F / dew −47.4°F
Sourced facts
Temperature glide
3.1°F at a 40°F dew point[3]
R-422A PT calculator Superheat

R-422A PT chart — printable saturation table

Looking for the R-422A PT chart PDF for shop reference? The complete pressure-temperature saturation table is below: every 1° increment from −40°F to 150°F (or to the refrigerant's critical temperature). Use the Print / Save as PDF button in the table header to download a clean, table-only PDF (the rest of the page is hidden from the print output).

R-422A PT Chart — Pressure-Temperature Saturation Table

Computed with CoolProp 7.2.0 in 1°F steps · hvacptcharts.com

R-422A · 1° increments · °F / PSIG
Tinted rows: 32°F H₂O freeze
R-422A pressure-temperature saturation table in Fahrenheit and PSIG
Temp (°F)Bubble (PSIG)Dew (PSIG)
−40°F 5.43.2
−39°F 5.93.7
−38°F 6.44.2
−37°F 7.04.7
−36°F 7.55.2
−35°F 8.15.7
−34°F 8.66.2
−33°F 9.26.8
−32°F 9.87.3
−31°F 10.47.9
−30°F 11.08.4
−29°F 11.69.0
−28°F 12.29.6
−27°F 12.810.2
−26°F 13.510.8
−25°F 14.111.4
−24°F 14.812.1
−23°F 15.512.7
−22°F 16.213.4
−21°F 16.914.0
−20°F 17.614.7
−19°F 18.415.4
−18°F 19.116.1
−17°F 19.916.8
−16°F 20.617.6
−15°F 21.418.3
−14°F 22.219.1
−13°F 23.019.9
−12°F 23.920.6
−11°F 24.721.4
−10°F 25.522.3
−9°F 26.423.1
−8°F 27.323.9
−7°F 28.224.8
−6°F 29.125.6
−5°F 30.026.5
−4°F 31.027.4
−3°F 31.928.3
−2°F 32.929.3
−1°F 33.930.2
0°F 34.931.2
1°F 35.932.2
2°F 36.933.1
3°F 38.034.2
4°F 39.035.2
5°F 40.136.2
6°F 41.237.3
7°F 42.338.3
8°F 43.439.4
9°F 44.640.5
10°F 45.841.7
11°F 46.942.8
12°F 48.144.0
13°F 49.445.1
14°F 50.646.3
15°F 51.847.5
16°F 53.148.8
17°F 54.450.0
18°F 55.751.3
19°F 57.052.5
20°F 58.453.8
21°F 59.755.2
22°F 61.156.5
23°F 62.557.9
24°F 63.959.2
25°F 65.460.6
26°F 66.862.0
27°F 68.363.5
28°F 69.864.9
29°F 71.366.4
30°F 72.967.9
31°F 74.469.4
32°F H₂O freeze76.071.0
33°F 77.672.5
34°F 79.274.1
35°F 80.975.7
36°F 82.577.3
37°F 84.279.0
38°F 85.980.6
39°F 87.682.3
40°F 89.484.0
41°F 91.285.8
42°F 93.087.5
43°F 94.889.3
44°F 96.691.1
45°F 98.592.9
46°F 100.494.8
47°F 102.396.7
48°F 104.298.6
49°F 106.2100.5
50°F 108.2102.4
51°F 110.2104.4
52°F 112.2106.4
53°F 114.3108.4
54°F 116.4110.5
55°F 118.5112.5
56°F 120.6114.6
57°F 122.8116.7
58°F 124.9118.9
59°F 127.2121.0
60°F 129.4123.2
61°F 131.6125.5
62°F 133.9127.7
63°F 136.3130.0
64°F 138.6132.3
65°F 141.0134.6
66°F 143.4137.0
67°F 145.8139.4
68°F 148.2141.8
69°F 150.7144.2
70°F 153.2146.7
71°F 155.7149.2
72°F 158.3151.7
73°F 160.9154.3
74°F 163.5156.9
75°F 166.2159.5
76°F 168.8162.1
77°F 171.5164.8
78°F 174.3167.5
79°F 177.1170.3
80°F 179.8173.0
81°F 182.7175.8
82°F 185.5178.7
83°F 188.4181.5
84°F 191.3184.4
85°F 194.3187.3
86°F 197.3190.3
87°F 200.3193.3
88°F 203.3196.3
89°F 206.4199.3
90°F 209.5202.4
91°F 212.7205.6
92°F 215.8208.7
93°F 219.0211.9
94°F 222.3215.1
95°F 225.6218.4
96°F 228.9221.7
97°F 232.2225.0
98°F 235.6228.3
99°F 239.0231.7
100°F 242.4235.2
101°F 245.9238.6
102°F 249.4242.1
103°F 253.0245.7
104°F 256.6249.3
105°F 260.2252.9
106°F 263.9256.5
107°F 267.6260.2
108°F 271.3263.9
109°F 275.1267.7
110°F 278.9271.5
111°F 282.7275.3
112°F 286.6279.2
113°F 290.5283.1
114°F 294.5287.1
115°F 298.5291.1
116°F 302.5295.2
117°F 306.6299.2
118°F 310.7303.4
119°F 314.9307.5
120°F 319.1311.7
121°F 323.3316.0
122°F 327.6320.3
123°F 331.9324.6
124°F 336.3329.0
125°F 340.7333.5
126°F 345.1337.9
127°F 349.6342.4
128°F 354.2347.0
129°F 358.8351.6
130°F 363.4356.3
131°F 368.1361.0
132°F 372.8365.7
133°F 377.5370.5
134°F 382.3375.4
135°F 387.2380.3
136°F 392.1385.3
137°F 397.0390.3
138°F 402.0395.3
139°F 407.1400.4
140°F 412.2405.6
141°F 417.3410.8
142°F 422.5416.1
143°F 427.8421.4
144°F 433.1426.8
145°F 438.4432.3
146°F 443.8437.8
147°F 449.3443.4
148°F 454.8449.1
149°F 460.3454.8
150°F 466.0460.6
CoolProp 7.2.0 · PSIG/kPa = gauge · PSIA = PSIG + 14.6959 · kPa(abs) = kPa(gauge) + 101.325

Full saturation values at 1° increments. Toggle between °F / PSIG and °C / kPa. Use Print / Save as PDF for laminated shop reference, or download the CSV / JSON below for use in other tools. R-422A PT chart data: CoolProp 7.2.0 (published Helmholtz equations of state / mixture models — see the source citations above).

A1
Lower toxicity, no flame propagation

Lower toxicity (Occupational Exposure Limit ≥ 400 ppm). No flame propagation in air at standard atmospheric pressure and 60°C. R-134a, R-22, R-410A, R-404A, R-744 (CO2) are A1.

Flammability
None (no flame propagation)
Toxicity
Lower (OEL ≥ 400 ppm)

Classification per ANSI/ASHRAE Standard 34-2022. See full reference.

Saturation pressure-temperature curve

Pressure
Temperature
°F
70°F: 153.2 PSIG (bubble)146.7 PSIG (dew)
Quick lookup — R-422A
153.2 / 146.7PSIG(1,056 / 1,012 kPa)
Bubble Dew· zeotropic blend
Range: −40 to 150°F Open full PT calculator →
Common service temperatures
32°F
76 / 71PSIG
Freezing
45°F
99 / 93PSIG
Heat-pump heat
70°F
153 / 147PSIG
Standard
75°F
166 / 159PSIG
Test ref
80°F
180 / 173PSIG
Warm
95°F
226 / 218PSIG
Summer peak

Saturation values from CoolProp 7.2.0 mixture model: R-125/R-134a/R-600a, 85.1/11.5/3.4% by mass[3]. Operating pressure on a running system differs — see the operating-pressure references for in-use values.

At a glance

Chemistry

R-125/R-134a/R-600a (85.1/11.5/3.4)
Ternary HFC blend with isobutane

Lubricant compatibility

MOABPOE

Mineral-oil-compatible retrofit for R-502 and R-22 low-temperature systems.

Blend composition

  • R-125 85.1%
  • R-134a 11.5%
  • R-600a 3.4%

Trade names

  • ISCEON MO79 — Chemours

Common applications

  • R-502 retrofit (low-temperature commercial refrigeration)
  • R-22 retrofit (low-temp)

Properties

  • Boiling point (1 atm)
    bubble −52.1°F (−46.7°C), dew −47.4°F (−44.1°C)
  • Critical point
    No single point — blend critical locus
  • Molar mass
    113.60 g/mol
  • Temperature glide
    3.1°F
  • ODP
    0
  • GWP (100-yr)
    3,143 US EPA value, 40 CFR 84.64(b) IPCC: AR4 not assessed · AR5 not assessed · AR6 not assessed
  • New-equipment status (US)
    Restricted in 48 new-equipment categories — US new-equipment rules (40 CFR 84.54).

What is R-422A?

R-422A is a ternary blend specifically targeting R-502 retrofit. R-422A's high R-125 content (85.1%) provides the low-temperature capacity and pressure characteristics needed to match R-502 in existing equipment.

Where R-422A is used

  • R-502 retrofit (low-temperature commercial refrigeration — the primary application)
  • R-22 retrofit (low-temperature only; the R-125-dominant composition is sized for low-evap operation)
  • Walk-in freezers, frozen food cases, ice machines (legacy equipment)

Regulatory & phase-down status

R-422A's GWP of 3,143 is far above the AIM Act 700 threshold. For new equipment R-422A is not the choice; for retrofit of legacy R-502 or R-22 low-temperature equipment it remains commercially available.

The remaining R-502 retrofit market is small. For modern low-temperature commercial refrigeration, the path is R-448A, R-449A (medium-GWP retrofit), R-454C, R-455A (low-GWP A2L), R-744 (CO2 transcritical), or R-290 (propane, charge-limited).

Service notes

Compatible with mineral oil (MO), alkylbenzene (AB), and POE oils. R-422A has small to moderate temperature glide (~3-4°F at typical low-temperature operating pressures).

Temperature glide

Temperature glide across evaporator at constant pressureR-422A at 89 PSIG suction→ refrigerant flow →Entry: 40.0°F Mid: 41.5°F Exit: 43.0°F Glide = 3.0°F Position along evaporator coil40°F 43°F

R-422A is a zeotropic blend: at constant pressure it boils across a temperature range rather than at a single point. Use the dew curve for superheat, bubble curve for subcooling.

Operating cycle

CompressorRaises pressureCondenserRejects heat to outdoorsExpansion deviceDrops pressureEvaporatorAbsorbs heat from indoorsDischarge: 279 PSIG, 180°F Liquid: 279 PSIG, 100°F Evap inlet: 84 PSIG, 40°F (two-phase)Suction: 84 PSIG, 50°F Example cycle for R-422A (40°F evap, 110°F condenser, 10°F superheat, 10°F subcooling)

Phase-down timeline

R-422A contains HFC-125 and HFC-134a, regulated substances under the AIM Act. Its GWP under 40 CFR 84.64 is 3,143, at or above the limit in 48 of the categories 40 CFR 84.54 restricts (listed under “All 84.54 categories restricting R-422A”).

HFC production & consumption allowances step down to 30% of baseline in 2029–2033, 20% of baseline in 2034–2035, and 15% of baseline in 2036 and later (42 U.S.C. 7675(e)(2)(C)).

Full 40 CFR 84.54 new-equipment rules for R-422A →

US new-equipment rules (40 CFR 84.54)

R-422A contains HFC-125 and HFC-134a, regulated substances under the AIM Act. Under 40 CFR 84.64(b) its GWP is 3,143: each component's GWP times its mass fraction; components without a GWP under 84.64 are left out (84.64(c)). That value is compared against each 40 CFR 84.54 subsector limit below.

All 84.54 categories restricting R-422A (48)
Refrigeration, air conditioning & heat pumps (41)
January 1, 2025Self-contained residential & light-commercial AC and heat pump productsGWP ≥ 700(a)(1)
January 1, 2025Chillers for comfort coolingGWP ≥ 700(a)(10)(i)
January 1, 2025Chillers for ice rinksGWP ≥ 700(a)(10)(ii)
January 1, 2025Residential dehumidifiersGWP ≥ 700(a)(2)
January 1, 2025Household refrigerators and freezersGWP ≥ 150(a)(3)
January 1, 2025Retail food refrigeration — stand-alone unitsGWP ≥ 150(a)(4)
January 1, 2025Vending machinesGWP ≥ 150(a)(5)
January 1, 2025Refrigerated transport — road and marine (self-contained products)listed refrigerant(a)(7)
January 1, 2025Residential & light-commercial AC and heat pump systems (except VRF)GWP ≥ 700(c)(1)
January 1, 2025Chillers for comfort coolingGWP ≥ 700(c)(3)
January 1, 2025Ice rinksGWP ≥ 700(c)(4)
January 1, 2025Refrigerated transport — road or marine systemslisted refrigerant(c)(8)
January 1, 2026Chillers for industrial process refrigeration, fluid exiting the chiller warmer than −22°F (−30°C)GWP ≥ 700(a)(10)(iii)
January 1, 2026Industrial process refrigeration products (non-chiller), charge 200 lb or greater, refrigerant entering the evaporator warmer than −22°F (−30°C)GWP ≥ 150(a)(12)(i)
January 1, 2026Industrial process refrigeration products (non-chiller), charge less than 200 lb, refrigerant entering the evaporator warmer than −22°F (−30°C)GWP ≥ 300(a)(12)(ii)
January 1, 2026Ice makers — batch type up to 1,000 lb of ice per 24 h and continuous type up to 1,200 lb per 24 hGWP ≥ 150(a)(8)(i)
January 1, 2026Industrial process refrigeration systems (non-chiller), charge 200 lb or greater, evaporator inlet warmer than −22°F (−30°C), not the high-temperature side of a cascadeGWP ≥ 150(c)(10)(i)
January 1, 2026Industrial process refrigeration systems (non-chiller), charge less than 200 lb, evaporator inlet warmer than −22°F (−30°C)GWP ≥ 300(c)(10)(ii)
January 1, 2026Industrial process refrigeration — high-temperature side of cascade systems, evaporator inlet warmer than −22°F (−30°C)GWP ≥ 300(c)(10)(iii)
January 1, 2026Variable refrigerant flow (VRF) residential & light-commercial AC and heat pump systemsGWP ≥ 700(c)(2)
January 1, 2026Chillers for industrial process refrigeration, fluid exiting the chiller warmer than −22°F (−30°C)GWP ≥ 700(c)(5)(i)
July 27, 2026Refrigerated transport — intermodal containers with a box temperature of −31°F (−35°C) or higherGWP ≥ 700(a)(6)
July 27, 2026Retail food refrigeration — remote condensing unitsGWP ≥ 1,400(c)(11)(i)
July 27, 2026Refrigerated transport — intermodal containers with a box temperature of −31°F (−35°C) or higherGWP ≥ 700(c)(7)
July 27, 2026Cold storage warehouse systemsGWP ≥ 700(c)(9)(i)
January 1, 2027Self-contained products in data center, information technology equipment facility, and computer room coolingGWP ≥ 700(a)(11)
January 1, 2027Ice makers — batch type above 1,000 lb of ice per 24 h and continuous type above 1,200 lb per 24 hlisted refrigerant(a)(8)(ii)
January 1, 2027Refrigerated food processing and dispensing products outside the scope of UL 621, charge 500 g or lessGWP ≥ 150(a)(9)(i)
January 1, 2027Refrigerated food processing and dispensing products outside the scope of UL 621, charge greater than 500 glisted refrigerant(a)(9)(ii)
January 1, 2027Supermarket systemsGWP ≥ 1,400(c)(12)(i)
January 1, 2027Data center, information technology equipment facility, and computer room cooling systemsGWP ≥ 700(c)(13)
January 1, 2027Automatic commercial ice machines with a remote condenserlisted refrigerant(c)(14)
January 1, 2027Refrigerated food processing and dispensing equipment with a remote condenserlisted refrigerant(c)(15)
January 1, 2028Chillers for industrial process refrigeration, fluid exiting the chiller from −58°F to −22°F (−50°C to −30°C)GWP ≥ 700(a)(10)(iv)
January 1, 2028Industrial process refrigeration products (non-chiller), refrigerant entering the evaporator from −58°F to −22°F (−50°C to −30°C)GWP ≥ 700(a)(12)(iii)
January 1, 2028Refrigerated food processing and dispensing products within the scope of UL 621 (ice cream makers)listed refrigerant(a)(9)(iii)
January 1, 2028Industrial process refrigeration systems (non-chiller), evaporator inlet from −58°F to −22°F (−50°C to −30°C)GWP ≥ 700(c)(10)(iv)
January 1, 2028Chillers for industrial process refrigeration, fluid exiting the chiller from −58°F to −22°F (−50°C to −30°C)GWP ≥ 700(c)(6)(i)
January 1, 2032Retail food refrigeration — remote condensing unitsGWP ≥ 150 (200 lb or greater, not the cascade high side); GWP ≥ 300 (less than 200 lb); GWP ≥ 300 (cascade high side)(c)(11)(ii)
January 1, 2032Supermarket systemsGWP ≥ 150 (200 lb or greater, not the cascade high side); GWP ≥ 300 (less than 200 lb); GWP ≥ 300 (cascade high side)(c)(12)(ii)
January 1, 2032Cold storage warehouse systemsGWP ≥ 150 (200 lb or greater, not the cascade high side); GWP ≥ 300 (less than 200 lb); GWP ≥ 300 (cascade high side)(c)(9)(ii)
Motor vehicle air conditioning (3)
October 24, 2024Motor vehicle air-conditioning in Model Year 2025 and later light-duty passenger cars and trucks (gross vehicle weight rating under 8,500 lb)GWP ≥ 150(a)(13)(i)
Model Year 2028Motor vehicle air-conditioning in medium-duty passenger vehicles, heavy-duty pickup trucks and complete heavy-duty vans whose air-conditioning will not be modified by upfittersGWP ≥ 150(a)(13)(ii)
January 1, 2028Motor vehicle air-conditioning in certain nonroad vehicles (agricultural tractors over 40 horsepower; self-propelled agricultural machinery; compact equipment; construction, forestry and mining equipment; and commercial utility vehicles)GWP ≥ 150(a)(13)(iii)
Foam blowing agents (2)
January 1, 2025Foam products: rigid polyurethane appliance foam, commercial refrigeration foam, laminated boardstock, marine flotation foam, sandwich panels, slabstock; flexible polyurethane; integral skin polyurethane; polystyrene (extruded boardstock, billet, extruded sheet); phenolic insulation board and bunstock; polyisocyanurate laminated boardstock; polyolefin; rigid polyurethane spray foamGWP ≥ 150(a)(14)
January 1, 2026Foam products in the (a)(14) formulations for use in space and military applicationsGWP ≥ 150(a)(15)
Aerosol propellants / solvents (2)
January 1, 2025Aerosol productsGWP ≥ 150(a)(16)(i)
January 1, 2028Aerosol products (all, except defense sprays as defined in 84.3)GWP ≥ 150(a)(16)(ii)

Servicing. 40 CFR 84.54 restricts new manufacture/import, later sale/distribution, and installation. "Installation" is defined in 84.54(e); repairing or servicing existing R-422A equipment is not an installation unless it meets 84.54(e), so existing systems can keep being serviced. From January 1, 2029, servicing or repairing R-422A equipment in supermarket systems, refrigerated transport or automatic commercial ice makers must be done with reclaimed refrigerant[2].

Source: 40 CFR 84.54, current through 91 FR 31329 (May 26, 2026). Installation defined at 40 CFR 84.54(e).

Global warming potential, in context

R-22 retrofit blends

R-407C1.8kR-221.8kR-427A2.1kR-438A2.3kR-417A2.3kR-422B2.5kR-421A2.6kR-422D2.7kR-422A3.1k

Retrofit and replacement paths

R-422A replaces

Replacements for R-422A

R-422A vs R-502, R-22, R-449A, R-455A: saturation pressure

Saturation pressure (PSIG, gauge) for R-422A vs R-502, R-22, R-449A, R-455A — zeotropic blends shown as dew / bubble. Each column shows the percent difference from R-422A. Source: CoolProp 7.2.0 dataset.
TempR-422AR-502R-22R-449AR-455A
0°F31.2 / 34.929.8(−15%)24.0(−31%)24.2 / 33.4(−4%)22.3 / 44.1(+27%)
40°F84.0 / 89.477.9(−13%)68.6(−23%)71.6 / 87.4(−2%)66.9 / 103.3(+16%)
70°F146.7 / 153.2133.9(−13%)121.4(−21%)129.4 / 151.0(−1%)121.1 / 170.1(+11%)
100°F235.2 / 242.4211.8(−13%)195.9(−19%)212.7 / 240.0(−1%)199.6 / 260.7(+8%)

Frequently asked

›Why was R-502 originally banned?

R-502 is a 48.8/51.2 R-22/R-115 azeotropic blend. R-115 is a chlorofluorocarbon (CFC) with ODP 0.6 and GWP 7,370 — production was banned in the US in 1996 under the Montreal Protocol CFC phase-out. R-22 alone has lower capacity at low-temperature setpoints than R-502 had, which is why R-502 was developed in the first place — and which made R-502 retrofit a service-engineering challenge when the ban took effect.

›What is the normal operating pressure of R-422A?

Operating pressure depends on evaporator load and ambient. The saturation pressures are in the PT table and the comparison table on this page.

›What lubricant does R-422A use?

Compatible with mineral oil (MO), alkylbenzene (AB), and POE. The 3.4% R-600a hydrocarbon component aids HFC-mineral-oil miscibility.

›Does R-422A have temperature glide?

Yes — about 3-4°F at typical low-temperature operating pressures. This is smaller than R-407C's 7°F glide or R-448A's 10°F glide, reflecting the R-125-dominant composition. Use the dew curve for superheat measurement on zeotropic blends.

›What is the GWP of R-422A?

3143 (mass-weighted from R-125, R-134a, and R-600a components). This is comparable to R-404A's 3,922 — both are high-GWP HFC blends. The R-125 component (GWP 3,500) drives most of R-422A's GWP.

Download this dataset

Full PT chart for R-422A · CC BY 4.0 · attribute the source

CSV JSON

Sources & citations

  1. [1]
    2017 Guideline for Assignment of Refrigerant Container Colors (AHRI Guideline N-2017). AHRI. 2017. https://www.ahrinet.org/system/files/2023-06/AHRI_Guideline_N_2017.pdf (accessed October 2, 2026)
  2. [2]
    40 CFR 84.112 — Reclamation. eCFR (Office of the Federal Register). up to date as of 9/25/2026. https://www.ecfr.gov/current/title-40/chapter-I/subchapter-C/part-84/subpart-C/section-84.112 (accessed October 2, 2026). 89 FR 82859, Oct. 11, 2024
  3. [3]
    CoolProp 7.2.0. CoolProp (I. H. Bell, J. Wronski, S. Quoilin, V. Lemort). https://coolprop.org/ (accessed October 2, 2026). Bell, I. H.; Wronski, J.; Quoilin, S.; Lemort, V. Pure and Pseudo-pure Fluid Thermophysical Property Evaluation and the Open-Source Thermophysical Property Library CoolProp. Ind. Eng. Chem. Res. 53, 2498–2508 (2014). https://doi.org/10.1021/ie4033999

Data sources & provenance

PT chart
CoolProp 7.2.0 mixture model: R-125/R-134a/R-600a, 85.1/11.5/3.4% by mass
Properties
CoolProp 7.2.0 + ASHRAE Standard 34-2022
GWP (100-yr)
US EPA value, 40 CFR 84.64(b) · IPCC AR4/AR5/AR6 on the GWP rankings
Table computed
October 2026

Reference material. Always verify pressure values against the equipment data plate and manufacturer service literature before charging or troubleshooting a specific system. Saturation pressure differs from operating pressure — see superheat & subcooling fundamentals. See how this PT table is calculated in our methodology.