HVAC PT Charts
RefrigerantASHRAE R-452A

R452A PT Chart

Updated October 12, 2026

R-452A

A1 Lower toxicity, no flame propagationHFC/HFO blend AIM Act HFC
R-452A 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: R452A, safety class A1, GWP 2,140. No red band: AHRI Guideline N-2017 reserves it for flammable refrigerants.R452AA1GWP 2,140
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-452A, safety class A1, GWP 2,140. No red band: AHRI Guideline N-2017 reserves it for flammable refrigerants[1], section 4.7.
R-32/R-125/R-1234yf (11/59/30)

Ternary HFC/HFO blend (11% R-32 / 59% R-125 / 30% R-1234yf). Branded as Chemours Opteon XP44. ASHRAE A1, GWP 2,140 — engineered for transport refrigeration where R-404A's capacity and low-temperature performance are critical.

R-452A saturation pressure splits across its glide: dew 79.5 PSIG at 40°F, bubble 247.8 PSIG at 100°F, and 140.1–156.9 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
156.9 / 140.1 PSIG
GWP (100-yr)
2,140 US EPA value, 40 CFR 84.64(b)
Temperature glide
7.0°F
Boiling point
bubble −52.5°F / dew −45.7°F
Sourced facts
Temperature glide
7.0°F at a 40°F dew point[3]
R-452A PT calculator Superheat

R-452A PT chart — printable saturation table

Looking for the R-452A 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-452A PT Chart — Pressure-Temperature Saturation Table

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

R-452A · 1° increments · °F / PSIG
Tinted rows: 32°F H₂O freeze
R-452A pressure-temperature saturation table in Fahrenheit and PSIG
Temp (°F)Bubble (PSIG)Dew (PSIG)
−40°F 5.72.4
−39°F 6.22.8
−38°F 6.73.3
−37°F 7.33.8
−36°F 7.84.2
−35°F 8.44.7
−34°F 8.95.2
−33°F 9.55.7
−32°F 10.16.2
−31°F 10.76.8
−30°F 11.37.3
−29°F 12.07.8
−28°F 12.68.4
−27°F 13.39.0
−26°F 13.99.6
−25°F 14.610.1
−24°F 15.310.7
−23°F 16.011.4
−22°F 16.712.0
−21°F 17.412.6
−20°F 18.213.3
−19°F 18.913.9
−18°F 19.714.6
−17°F 20.415.3
−16°F 21.216.0
−15°F 22.016.7
−14°F 22.817.4
−13°F 23.718.1
−12°F 24.518.9
−11°F 25.419.6
−10°F 26.320.4
−9°F 27.121.2
−8°F 28.022.0
−7°F 29.022.8
−6°F 29.923.6
−5°F 30.824.5
−4°F 31.825.3
−3°F 32.826.2
−2°F 33.827.1
−1°F 34.828.0
0°F 35.828.9
1°F 36.829.8
2°F 37.930.8
3°F 39.031.7
4°F 40.132.7
5°F 41.233.7
6°F 42.334.7
7°F 43.435.7
8°F 44.636.8
9°F 45.837.8
10°F 46.938.9
11°F 48.240.0
12°F 49.441.1
13°F 50.642.2
14°F 51.943.3
15°F 53.244.5
16°F 54.545.7
17°F 55.846.9
18°F 57.148.1
19°F 58.549.3
20°F 59.950.5
21°F 61.351.8
22°F 62.753.1
23°F 64.154.4
24°F 65.655.7
25°F 67.057.0
26°F 68.558.4
27°F 70.059.8
28°F 71.661.2
29°F 73.162.6
30°F 74.764.0
31°F 76.365.5
32°F H₂O freeze77.966.9
33°F 79.668.4
34°F 81.270.0
35°F 82.971.5
36°F 84.673.1
37°F 86.374.6
38°F 88.176.2
39°F 89.977.9
40°F 91.779.5
41°F 93.581.2
42°F 95.382.9
43°F 97.284.6
44°F 99.186.3
45°F 101.088.1
46°F 102.989.9
47°F 104.991.7
48°F 106.893.5
49°F 108.995.4
50°F 110.997.2
51°F 112.999.1
52°F 115.0101.1
53°F 117.1103.0
54°F 119.3105.0
55°F 121.4107.0
56°F 123.6109.0
57°F 125.8111.1
58°F 128.0113.1
59°F 130.3115.2
60°F 132.6117.4
61°F 134.9119.5
62°F 137.2121.7
63°F 139.6123.9
64°F 142.0126.1
65°F 144.4128.4
66°F 146.9130.7
67°F 149.3133.0
68°F 151.8135.4
69°F 154.4137.7
70°F 156.9140.1
71°F 159.5142.6
72°F 162.1145.0
73°F 164.8147.5
74°F 167.4150.0
75°F 170.1152.6
76°F 172.9155.1
77°F 175.6157.7
78°F 178.4160.4
79°F 181.3163.0
80°F 184.1165.7
81°F 187.0168.5
82°F 189.9171.2
83°F 192.8174.0
84°F 195.8176.8
85°F 198.8179.7
86°F 201.9182.6
87°F 204.9185.5
88°F 208.0188.5
89°F 211.2191.4
90°F 214.3194.5
91°F 217.5197.5
92°F 220.8200.6
93°F 224.0203.7
94°F 227.3206.9
95°F 230.7210.1
96°F 234.0213.3
97°F 237.4216.6
98°F 240.8219.8
99°F 244.3223.2
100°F 247.8226.5
101°F 251.3230.0
102°F 254.9233.4
103°F 258.5236.9
104°F 262.2240.4
105°F 265.8243.9
106°F 269.5247.5
107°F 273.3251.2
108°F 277.1254.8
109°F 280.9258.6
110°F 284.7262.3
111°F 288.6266.1
112°F 292.6269.9
113°F 296.5273.8
114°F 300.5277.7
115°F 304.6281.7
116°F 308.7285.7
117°F 312.8289.7
118°F 316.9293.8
119°F 321.1297.9
120°F 325.4302.1
121°F 329.6306.3
122°F 333.9310.5
123°F 338.3314.8
124°F 342.7319.2
125°F 347.1323.6
126°F 351.6328.0
127°F 356.1332.5
128°F 360.7337.0
129°F 365.3341.6
130°F 369.9346.2
131°F 374.6350.9
132°F 379.3355.6
133°F 384.1360.4
134°F 388.9365.2
135°F 393.7370.1
136°F 398.6375.1
137°F 403.6380.0
138°F 408.5385.1
139°F 413.6390.2
140°F 418.6395.3
141°F 423.7400.5
142°F 428.9405.8
143°F 434.1411.1
144°F 439.3416.5
145°F 444.6422.0
146°F 450.0427.5
147°F 455.3433.1
148°F 460.8438.7
149°F 466.2444.4
150°F 471.7450.2
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-452A 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: 156.9 PSIG (bubble)140.1 PSIG (dew)
Quick lookup — R-452A
156.9 / 140.1PSIG(1,082 / 966 kPa)
Bubble Dew· zeotropic blend
Range: −40 to 150°F Open full PT calculator →
Common service temperatures
32°F
78 / 67PSIG
Freezing
45°F
101 / 88PSIG
Heat-pump heat
70°F
157 / 140PSIG
Standard
75°F
170 / 153PSIG
Test ref
80°F
184 / 166PSIG
Warm
95°F
231 / 210PSIG
Summer peak

Saturation values from CoolProp 7.2.0 mixture model: R-32/R-125/R-1234yf, 11/59/30% by mass[3]. Operating pressure on a running system differs — see the operating-pressure references for in-use values.

At a glance

Chemistry

R-32/R-125/R-1234yf (11/59/30)
Ternary HFC/HFO blend

Lubricant compatibility

POEMO

POE required. Targeted at transport refrigeration where R-404A pressure/capacity match matters. Lower GWP than R-404A but still significant.

Blend composition

  • R-32 11.0%
  • R-125 59.0%
  • R-1234yf 30.0%

Trade names

  • Opteon XP44 — Chemours

Common applications

  • Transport refrigeration (truck, trailer, marine)
  • Commercial refrigeration
  • R-404A retrofit

Properties

  • Boiling point (1 atm)
    bubble −52.5°F (−47.0°C), dew −45.7°F (−43.2°C)
  • Critical point
    No single point — blend critical locus
  • Molar mass
    103.51 g/mol
  • Temperature glide
    7.0°F
  • ODP
    0
  • GWP (100-yr)
    2,140 US EPA value, 40 CFR 84.64(b) IPCC: AR4 not assessed · AR5 1,945 · AR6 2,292
  • New-equipment status (US)
    Restricted in 41 new-equipment categories — US new-equipment rules (40 CFR 84.54).

What is R-452A?

R-452A is a ternary zeotropic blend developed by Chemours specifically for transport refrigeration applications — truck, trailer, intermodal container, and marine refrigeration where the demanding duty cycle (high ambient, road vibration, frequent door openings, low-temperature setpoints) makes R-404A's capacity and pressure characteristics hard to replace without performance penalty.

The composition combines R-32 (capacity), R-125 (non-flammability and pressure rating), and R-1234yf (lower GWP). The blend is non-flammable A1, which simplifies vehicle and trailer system design where the A2L safety class would add cost and complexity to the closed transport environment.

Where R-452A is used

  • Refrigerated transport — truck and trailer reefer units
  • Marine refrigeration (intermodal containers, fishing fleet)
  • Self-contained commercial refrigeration where R-404A capacity match is needed
  • R-404A retrofit (specifically in transport applications)

Regulatory & phase-down status

R-452A's GWP of 2,140 is meaningfully lower than R-404A (3,922) but still above 150 (the limit in EU 517/2014 Annex III rows 11 and 13) and above the 700-GWP limit 40 CFR 84.54 sets for new residential and light-commercial AC and heat pumps and other stationary categories. Its position in the lineup is application-specific: where the duty cycle and equipment design favor an A1 non-flammable refrigerant and the lower-GWP alternatives (R-454C, R-455A at GWP 146) introduce A2L safety complications, R-452A is the medium-term compromise.

Long-term, transport refrigeration is transitioning toward R-454C, R-455A, R-744 (CO₂ transcritical), and R-290 (hydrocarbon, charge-limited self-contained units) depending on the specific application and regulatory regime.

Service notes

Polyolester (POE) oil is required. Significant temperature glide (~7°F at typical evaporator conditions); EXV is preferred for new equipment, and TXV systems require retuning per the equipment OEM guidance.

Transport refrigeration service has additional considerations beyond stationary refrigeration: vibration-rated service equipment, EPA Section 608 plus DOT compliance for transport refrigerant cylinders, and equipment-OEM-specific charging procedures (Carrier Transicold, Thermo King, etc. each have their own R-452A guidance).

Temperature glide

Temperature glide across evaporator at constant pressureR-452A at 92 PSIG suction→ refrigerant flow →Entry: 40.0°F Mid: 43.5°F Exit: 47.0°F Glide = 7.0°F Position along evaporator coil40°F 47°F

R-452A 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: 285 PSIG, 180°F Liquid: 285 PSIG, 100°F Evap inlet: 80 PSIG, 40°F (two-phase)Suction: 80 PSIG, 50°F Example cycle for R-452A (40°F evap, 110°F condenser, 10°F superheat, 10°F subcooling)

Phase-down timeline

R-452A contains HFC-32 and HFC-125, regulated substances under the AIM Act. Its GWP under 40 CFR 84.64 is 2,140, at or above the limit in 41 of the categories 40 CFR 84.54 restricts (listed under “All 84.54 categories restricting R-452A”).

  • From July 27, 2026 — new refrigerated transport — intermodal containers with a box temperature of −31°F (−35°C) or higher: manufacture / import restricted (GWP ≥ 700).
  • From July 27, 2026 — new refrigerated transport — intermodal containers with a box temperature of −31°F (−35°C) or higher: installation restricted (GWP ≥ 700).
  • From July 27, 2029 — new refrigerated transport — intermodal containers with a box temperature of −31°F (−35°C) or higher: sale and distribution restricted (GWP ≥ 700).

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-452A →

US new-equipment rules (40 CFR 84.54)

R-452A contains HFC-32 and HFC-125, regulated substances under the AIM Act. Under 40 CFR 84.64(b) its GWP is 2,140: 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.

EffectiveEquipment subsectorLimitRestriction
July 27, 2026Refrigerated transport — intermodal containers with a box temperature of −31°F (−35°C) or higherGWP ≥ 700Manufacture / import(a)(6)
July 27, 2026Refrigerated transport — intermodal containers with a box temperature of −31°F (−35°C) or higherGWP ≥ 700Installation(c)(7)
July 27, 2029Refrigerated transport — intermodal containers with a box temperature of −31°F (−35°C) or higherGWP ≥ 700Sale / distribution(b)
All 84.54 categories restricting R-452A (41)
Refrigeration, air conditioning & heat pumps (34)
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, 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, 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, 2027Refrigerated food processing and dispensing products outside the scope of UL 621, charge 500 g or lessGWP ≥ 150(a)(9)(i)
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, 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, 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-452A 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-452A 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

Commercial refrigeration — medium temperature

R-7441R-516A140R-454C146R-455A146R-450A601R-513A630R-448A1.4kR-449A1.4kR-407C1.8kR-221.8kR-407F1.8kR-407A2.1kR-404A3.9k

Retrofit and replacement paths

R-452A replaces

Replacements for R-452A

R-452A vs R-404A, R-454C, R-455A: saturation pressure

Saturation pressure (PSIG, gauge) for R-452A vs R-404A, R-454C, R-455A — zeotropic blends shown as dew / bubble. Each column shows the percent difference from R-452A. Source: CoolProp 7.2.0 dataset.
TempR-452AR-404AR-454CR-455A
0°F28.9 / 35.833.7(−6%)19.9 / 31.8(−11%)22.3 / 44.1(+23%)
40°F79.5 / 91.786.9(−5%)61.5 / 82.4(−10%)66.9 / 103.3(+13%)
70°F140.1 / 156.9149.3(−5%)112.2 / 141.2(−10%)121.1 / 170.1(+8%)
100°F226.5 / 247.8236.8(−4%)185.1 / 222.5(−10%)199.6 / 260.7(+5%)

Frequently asked

›Why R-452A in transport refrigeration instead of R-448A or R-449A?

Capacity and pressure match to R-404A. Transport refrigeration equipment is designed around R-404A's pressure envelope and capacity per unit displacement. R-452A's composition was specifically tuned to match R-404A capacity for transport's demanding duty cycle; the tradeoff is higher GWP (2,140 vs ~1,390 for R-448A/R-449A).

›What is the normal operating pressure of R-452A?

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-452A use?

Polyolester (POE) oil. Mineral oil and alkylbenzene are not miscible. POE is hygroscopic; deep vacuum and verified hold before charging are required.

›Does R-452A have temperature glide?

Yes — about 7°F at typical evaporator conditions. Use the dew curve for superheat measurement, bubble for subcooling. Charge by weight per the equipment manufacturer's specification, not by gauge.

›Can I retrofit an R-404A transport unit to R-452A?

Carrier Transicold and Thermo King both publish R-452A retrofit guidance for their reefer product lines.

›What's the long-term replacement for R-452A in transport?

For transport refrigeration the longer-term path varies by application. Truck and trailer reefer units are transitioning toward R-454C (A2L, GWP 146) and R-455A (A2L, GWP 146) where the safety class change is acceptable. Marine container refrigeration is moving toward R-744 (CO₂ transcritical) and R-454C. R-452A is the medium-term option where the A1 safety class outweighs the GWP premium.

›Is R-452A AIM Act compliant?

For transport refrigeration the AIM Act technology transition rules have different effective dates and GWP thresholds than for stationary AC. R-452A's GWP of 2,140 falls above the most restrictive 2025 thresholds for some equipment categories but remains permissible for transport-specific applications under the current rules. Verify the specific equipment category and effective date in the latest AIM Act SNAP rule.

Download this dataset

Full PT chart for R-452A · 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-32/R-125/R-1234yf, 11/59/30% 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.