R449A PT Chart
Updated October 12, 2026
R-449A
Four-component HFC/HFO blend sold by Chemours as Opteon™ XP40[10]: safety class A1[2], GWP 1,396 — 64% lower than R-404A's 3,922[9] — and a 9.5°F glide at a 40°F dew point[5].
R-449A saturation pressure splits across its glide: dew 71.6 PSIG at 40°F, bubble 240.0 PSIG at 100°F, and 129.4–151.0 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.
Checked against the Opteon™ XP40 Pressure-Temperature Data (Eng), C-10270 (7/23)[1] at 399 points from 0 to 400 psig: largest difference 0.16°F.
R-449A PT chart — printable saturation table
Looking for the R-449A 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-449A PT Chart — Pressure-Temperature Saturation Table
Computed with CoolProp 7.2.0 in 1°F steps · hvacptcharts.com
| Temp (°F) | Bubble (PSIG) | Dew (PSIG) |
|---|---|---|
| −40°F | 4.5 | 0.1 in. Hg vac. |
| −39°F | 5.0 | 0.4 |
| −38°F | 5.5 | 0.8 |
| −37°F | 6.0 | 1.2 |
| −36°F | 6.6 | 1.6 |
| −35°F | 7.1 | 2.1 |
| −34°F | 7.6 | 2.5 |
| −33°F | 8.2 | 3.0 |
| −32°F | 8.8 | 3.4 |
| −31°F | 9.3 | 3.9 |
| −30°F | 9.9 | 4.4 |
| −29°F | 10.5 | 4.9 |
| −28°F | 11.1 | 5.4 |
| −27°F | 11.8 | 5.9 |
| −26°F | 12.4 | 6.4 |
| −25°F | 13.0 | 7.0 |
| −24°F | 13.7 | 7.5 |
| −23°F | 14.4 | 8.1 |
| −22°F | 15.0 | 8.6 |
| −21°F | 15.7 | 9.2 |
| −20°F | 16.4 | 9.8 |
| −19°F | 17.2 | 10.4 |
| −18°F | 17.9 | 11.0 |
| −17°F | 18.6 | 11.6 |
| −16°F | 19.4 | 12.3 |
| −15°F | 20.2 | 12.9 |
| −14°F | 20.9 | 13.6 |
| −13°F | 21.7 | 14.2 |
| −12°F | 22.5 | 14.9 |
| −11°F | 23.4 | 15.6 |
| −10°F | 24.2 | 16.3 |
| −9°F | 25.0 | 17.1 |
| −8°F | 25.9 | 17.8 |
| −7°F | 26.8 | 18.5 |
| −6°F | 27.7 | 19.3 |
| −5°F | 28.6 | 20.1 |
| −4°F | 29.5 | 20.9 |
| −3°F | 30.5 | 21.7 |
| −2°F | 31.4 | 22.5 |
| −1°F | 32.4 | 23.3 |
| 0°F | 33.4 | 24.2 |
| 1°F | 34.4 | 25.0 |
| 2°F | 35.4 | 25.9 |
| 3°F | 36.4 | 26.8 |
| 4°F | 37.5 | 27.7 |
| 5°F | 38.5 | 28.6 |
| 6°F | 39.6 | 29.5 |
| 7°F | 40.7 | 30.5 |
| 8°F | 41.8 | 31.5 |
| 9°F | 43.0 | 32.4 |
| 10°F | 44.1 | 33.4 |
| 11°F | 45.3 | 34.4 |
| 12°F | 46.4 | 35.5 |
| 13°F | 47.6 | 36.5 |
| 14°F | 48.9 | 37.6 |
| 15°F | 50.1 | 38.7 |
| 16°F | 51.4 | 39.8 |
| 17°F | 52.6 | 40.9 |
| 18°F | 53.9 | 42.0 |
| 19°F | 55.2 | 43.2 |
| 20°F | 56.6 | 44.3 |
| 21°F | 57.9 | 45.5 |
| 22°F | 59.3 | 46.7 |
| 23°F | 60.7 | 47.9 |
| 24°F | 62.1 | 49.2 |
| 25°F | 63.5 | 50.4 |
| 26°F | 64.9 | 51.7 |
| 27°F | 66.4 | 53.0 |
| 28°F | 67.9 | 54.3 |
| 29°F | 69.4 | 55.6 |
| 30°F | 70.9 | 57.0 |
| 31°F | 72.5 | 58.4 |
| 32°F H₂O freeze | 74.0 | 59.8 |
| 33°F | 75.6 | 61.2 |
| 34°F | 77.2 | 62.6 |
| 35°F | 78.9 | 64.1 |
| 36°F | 80.5 | 65.5 |
| 37°F | 82.2 | 67.0 |
| 38°F | 83.9 | 68.5 |
| 39°F | 85.6 | 70.1 |
| 40°F | 87.4 | 71.6 |
| 41°F | 89.1 | 73.2 |
| 42°F | 90.9 | 74.8 |
| 43°F | 92.7 | 76.5 |
| 44°F | 94.6 | 78.1 |
| 45°F | 96.4 | 79.8 |
| 46°F | 98.3 | 81.5 |
| 47°F | 100.2 | 83.2 |
| 48°F | 102.1 | 84.9 |
| 49°F | 104.1 | 86.7 |
| 50°F | 106.1 | 88.5 |
| 51°F | 108.1 | 90.3 |
| 52°F | 110.1 | 92.1 |
| 53°F | 112.1 | 94.0 |
| 54°F | 114.2 | 95.8 |
| 55°F | 116.3 | 97.7 |
| 56°F | 118.4 | 99.7 |
| 57°F | 120.6 | 101.6 |
| 58°F | 122.8 | 103.6 |
| 59°F | 125.0 | 105.6 |
| 60°F | 127.2 | 107.7 |
| 61°F | 129.5 | 109.7 |
| 62°F | 131.7 | 111.8 |
| 63°F | 134.0 | 113.9 |
| 64°F | 136.4 | 116.0 |
| 65°F | 138.7 | 118.2 |
| 66°F | 141.1 | 120.4 |
| 67°F | 143.5 | 122.6 |
| 68°F | 146.0 | 124.9 |
| 69°F | 148.5 | 127.1 |
| 70°F | 151.0 | 129.4 |
| 71°F | 153.5 | 131.8 |
| 72°F | 156.0 | 134.1 |
| 73°F | 158.6 | 136.5 |
| 74°F | 161.2 | 138.9 |
| 75°F | 163.9 | 141.4 |
| 76°F | 166.6 | 143.9 |
| 77°F | 169.3 | 146.4 |
| 78°F | 172.0 | 148.9 |
| 79°F | 174.8 | 151.5 |
| 80°F | 177.5 | 154.1 |
| 81°F | 180.4 | 156.7 |
| 82°F | 183.2 | 159.3 |
| 83°F | 186.1 | 162.0 |
| 84°F | 189.0 | 164.7 |
| 85°F | 192.0 | 167.5 |
| 86°F | 194.9 | 170.3 |
| 87°F | 197.9 | 173.1 |
| 88°F | 201.0 | 175.9 |
| 89°F | 204.1 | 178.8 |
| 90°F | 207.2 | 181.7 |
| 91°F | 210.3 | 184.7 |
| 92°F | 213.5 | 187.6 |
| 93°F | 216.7 | 190.7 |
| 94°F | 219.9 | 193.7 |
| 95°F | 223.2 | 196.8 |
| 96°F | 226.5 | 199.9 |
| 97°F | 229.8 | 203.1 |
| 98°F | 233.2 | 206.2 |
| 99°F | 236.6 | 209.5 |
| 100°F | 240.0 | 212.7 |
| 101°F | 243.5 | 216.0 |
| 102°F | 247.0 | 219.3 |
| 103°F | 250.5 | 222.7 |
| 104°F | 254.1 | 226.1 |
| 105°F | 257.7 | 229.6 |
| 106°F | 261.4 | 233.0 |
| 107°F | 265.0 | 236.5 |
| 108°F | 268.8 | 240.1 |
| 109°F | 272.5 | 243.7 |
| 110°F | 276.3 | 247.3 |
| 111°F | 280.1 | 251.0 |
| 112°F | 284.0 | 254.7 |
| 113°F | 287.9 | 258.5 |
| 114°F | 291.8 | 262.3 |
| 115°F | 295.8 | 266.1 |
| 116°F | 299.8 | 270.0 |
| 117°F | 303.9 | 273.9 |
| 118°F | 308.0 | 277.8 |
| 119°F | 312.1 | 281.8 |
| 120°F | 316.3 | 285.9 |
| 121°F | 320.5 | 290.0 |
| 122°F | 324.7 | 294.1 |
| 123°F | 329.0 | 298.3 |
| 124°F | 333.3 | 302.5 |
| 125°F | 337.7 | 306.7 |
| 126°F | 342.1 | 311.0 |
| 127°F | 346.5 | 315.4 |
| 128°F | 351.0 | 319.8 |
| 129°F | 355.6 | 324.2 |
| 130°F | 360.1 | 328.7 |
| 131°F | 364.7 | 333.2 |
| 132°F | 369.4 | 337.8 |
| 133°F | 374.1 | 342.5 |
| 134°F | 378.8 | 347.1 |
| 135°F | 383.6 | 351.9 |
| 136°F | 388.4 | 356.7 |
| 137°F | 393.3 | 361.5 |
| 138°F | 398.2 | 366.4 |
| 139°F | 403.1 | 371.3 |
| 140°F | 408.1 | 376.3 |
| 141°F | 413.2 | 381.3 |
| 142°F | 418.3 | 386.4 |
| 143°F | 423.4 | 391.6 |
| 144°F | 428.6 | 396.8 |
| 145°F | 433.8 | 402.0 |
| 146°F | 439.0 | 407.3 |
| 147°F | 444.4 | 412.7 |
| 148°F | 449.7 | 418.1 |
| 149°F | 455.1 | 423.6 |
| 150°F | 460.6 | 429.2 |
| Temp (°C) | Bubble (kPa) | Dew (kPa) |
|---|---|---|
| −40°C | 31 | 0 |
| −39°C | 37 | 5 |
| −38°C | 44 | 10 |
| −37°C | 50 | 15 |
| −36°C | 57 | 21 |
| −35°C | 64 | 27 |
| −34°C | 72 | 33 |
| −33°C | 79 | 39 |
| −32°C | 87 | 46 |
| −31°C | 95 | 52 |
| −30°C | 104 | 59 |
| −29°C | 112 | 67 |
| −28°C | 121 | 74 |
| −27°C | 130 | 82 |
| −26°C | 140 | 90 |
| −25°C | 150 | 98 |
| −24°C | 160 | 107 |
| −23°C | 170 | 116 |
| −22°C | 181 | 125 |
| −21°C | 192 | 134 |
| −20°C | 204 | 144 |
| −19°C | 215 | 154 |
| −18°C | 227 | 164 |
| −17°C | 240 | 175 |
| −16°C | 252 | 186 |
| −15°C | 266 | 197 |
| −14°C | 279 | 209 |
| −13°C | 293 | 221 |
| −12°C | 307 | 233 |
| −11°C | 322 | 246 |
| −10°C | 337 | 259 |
| −9°C | 352 | 273 |
| −8°C | 368 | 286 |
| −7°C | 384 | 301 |
| −6°C | 401 | 315 |
| −5°C | 418 | 330 |
| −4°C | 436 | 346 |
| −3°C | 454 | 362 |
| −2°C | 472 | 378 |
| −1°C | 491 | 395 |
| 0°C H₂O freeze | 511 | 412 |
| 1°C | 530 | 430 |
| 2°C | 551 | 448 |
| 3°C | 571 | 466 |
| 4°C | 593 | 485 |
| 5°C | 615 | 505 |
| 6°C | 637 | 525 |
| 7°C | 660 | 545 |
| 8°C | 683 | 566 |
| 9°C | 707 | 588 |
| 10°C | 731 | 610 |
| 11°C | 756 | 632 |
| 12°C | 782 | 656 |
| 13°C | 808 | 679 |
| 14°C | 834 | 703 |
| 15°C | 862 | 728 |
| 16°C | 889 | 754 |
| 17°C | 918 | 780 |
| 18°C | 947 | 806 |
| 19°C | 976 | 833 |
| 20°C | 1,007 | 861 |
| 21°C | 1,037 | 889 |
| 22°C | 1,069 | 918 |
| 23°C | 1,101 | 948 |
| 24°C | 1,134 | 978 |
| 25°C | 1,167 | 1,009 |
| 26°C | 1,201 | 1,041 |
| 27°C | 1,236 | 1,073 |
| 28°C | 1,271 | 1,106 |
| 29°C | 1,307 | 1,140 |
| 30°C | 1,344 | 1,174 |
| 31°C | 1,382 | 1,209 |
| 32°C | 1,420 | 1,245 |
| 33°C | 1,459 | 1,281 |
| 34°C | 1,498 | 1,319 |
| 35°C | 1,539 | 1,357 |
| 36°C | 1,580 | 1,396 |
| 37°C | 1,622 | 1,435 |
| 38°C | 1,664 | 1,476 |
| 39°C | 1,708 | 1,517 |
| 40°C | 1,752 | 1,559 |
| 41°C | 1,797 | 1,602 |
| 42°C | 1,843 | 1,646 |
| 43°C | 1,889 | 1,690 |
| 44°C | 1,937 | 1,736 |
| 45°C | 1,985 | 1,782 |
| 46°C | 2,034 | 1,829 |
| 47°C | 2,084 | 1,877 |
| 48°C | 2,135 | 1,927 |
| 49°C | 2,186 | 1,977 |
| 50°C | 2,239 | 2,028 |
| 51°C | 2,292 | 2,080 |
| 52°C | 2,347 | 2,133 |
| 53°C | 2,402 | 2,187 |
| 54°C | 2,458 | 2,242 |
| 55°C | 2,515 | 2,298 |
| 56°C | 2,573 | 2,355 |
| 57°C | 2,632 | 2,413 |
| 58°C | 2,691 | 2,472 |
| 59°C | 2,752 | 2,533 |
| 60°C | 2,814 | 2,594 |
| 61°C | 2,877 | 2,657 |
| 62°C | 2,941 | 2,721 |
| 63°C | 3,005 | 2,786 |
| 64°C | 3,071 | 2,853 |
| 65°C | 3,138 | 2,921 |
| 66°C | 3,206 | 2,990 |
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-449A PT chart data: CoolProp 7.2.0 (published Helmholtz equations of state / mixture models — see the source citations above).
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[2], safety group definitions and refrigerant safety classifications. See full reference.
Saturation pressure-temperature curve
Saturation values from CoolProp 7.2.0 mixture model: R-32/R-125/R-1234yf/R-134a, 24.3/24.7/25.3/25.7% by mass[5]. Operating pressure on a running system differs — see what R-449A operating pressures should be.
At a glance
Chemistry
Lubricant compatibility
Blend composition
- R-32 24.3%
- R-125 24.7%
- R-1234yf 25.3%
- R-134a 25.7%
Trade names
- Opteon™ XP40 — Chemours[10]
Properties
- Boiling point (1 atm)bubble −50.3°F (−45.7°C), dew −39.9°F (−39.9°C)
- Critical pointNo single point — blend critical locus
- Molar mass87.21 g/mol
- Temperature glide9.5°F
- ODP0
- GWP (100-yr)1,396 US EPA value, 40 CFR 84.64(b) IPCC: AR4 not assessed · AR5 1,282 · AR6 1,504
- New-equipment status (US)Restricted in 39 new-equipment categories — US new-equipment rules (40 CFR 84.54).
What is R-449A?
R-449A is a blend of four refrigerants: R-32 (24.3%), R-125 (24.7%), R-1234yf (25.3%) and R-134a (25.7%) by mass[8]. Chemours recommends it to replace R-404A, R-507 and R-22 in low- and medium-temperature commercial and industrial refrigeration[10].
R-449A has four components and R-448A five: R-448A adds 7% R-1234ze(E)[8].
Where R-449A is used
Regulatory & phase-down status
R-449A contains HFC-32, HFC-125 and HFC-134a, regulated substances under the AIM Act[13], 42 U.S.C. 7675(c)(1). Its GWP of 1,396 (40 CFR 84.64) sits below the 1,400-GWP limits for remote condensing units and supermarket systems, so R-449A stays installable in new remote condensing units and supermarket systems until January 1, 2032, when the tiered limits at 40 CFR 84.54(c)(11)(ii) and (c)(12)(ii) take effect.[3], §84.54(c)(11), (c)(12) New cold storage warehouses are restricted earlier, from July 27, 2026, under 40 CFR 84.54(c)(9)(i) (GWP ≥700).[3], §84.54(c)(9)(i) See the US new-equipment rules (40 CFR 84.54) section on this page for the full list. Servicing existing equipment is not an installation under 84.54(e)[3], §84.54(e).
In the EU, Regulation (EU) No 517/2014, since replaced by (EU) 2024/573 applying from March 11, 2024, restricts high-GWP equipment on the market: row 11 covers hermetically sealed commercial refrigerators and freezers with GWP ≥150 from 2022, and row 13 covers multipack centralised systems of 40 kW or more with GWP ≥150 from 2022[4].[4], Annex III rows 11 and 13 R-449A's GWP is above 150, so both apply.[4], Annex III rows 11 and 13 Lower-GWP options include R-454C and R-455A (146) and R-744 (1)[9].
Temperature glide
R-449A 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
Phase-down timeline
R-449A contains HFC-32, HFC-125 and HFC-134a, regulated substances under the AIM Act[13], 42 U.S.C. 7675(c)(1). Its GWP under 40 CFR 84.64 is 1,396, at or above the limit in 39 of the categories 40 CFR 84.54 restricts (listed under “All 84.54 categories restricting R-449A”).
- From January 1, 2025 — new retail food refrigeration — stand-alone units: manufacture / import restricted (GWP ≥ 150)[3], §84.54(a)(4).
- From January 1, 2026 — new ice makers — batch type up to 1,000 lb of ice per 24 h and continuous type up to 1,200 lb per 24 h: manufacture / import restricted (GWP ≥ 150)[3], §84.54(a)(8)(i).
- 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)[3], §84.54(a)(6).
- From July 27, 2026 — new refrigerated transport — intermodal containers with a box temperature of −31°F (−35°C) or higher: installation restricted (GWP ≥ 700)[3], §84.54(c)(7).
- From July 27, 2026 — new cold storage warehouse systems: installation restricted (GWP ≥ 700)[3], §84.54(c)(9)(i).
- From January 1, 2028 — new retail food refrigeration — stand-alone units: sale and distribution restricted (GWP ≥ 150)[3], §84.54(b).
- From January 1, 2032 — new retail food refrigeration — remote condensing units: installation restricted at GWP ≥ 150 for systems with 200 lb or more of refrigerant (except the high-temperature side of a cascade system), and at GWP ≥ 300 for systems under 200 lb and for the high-temperature side of a cascade system[3], §84.54(c)(11)(ii).
- From January 1, 2032 — new supermarket systems: installation restricted at GWP ≥ 150 for systems with 200 lb or more of refrigerant (except the high-temperature side of a cascade system), and at GWP ≥ 300 for systems under 200 lb and for the high-temperature side of a cascade system[3], §84.54(c)(12)(ii).
- From January 1, 2032 — new cold storage warehouse systems: installation restricted at GWP ≥ 150 for systems with 200 lb or more of refrigerant (except the high-temperature side of a cascade system), and at GWP ≥ 300 for systems under 200 lb and for the high-temperature side of a cascade system[3], §84.54(c)(9)(ii).
R-449A (GWP 1,396) is under the 1,400 limit that has applied to new retail food refrigeration — remote condensing units since July 27, 2026, so it can be installed in them until the stricter limits start on January 1, 2032[3], §84.54(c)(11).
R-449A (GWP 1,396) is under the 1,400 limit for new supermarket systems that starts on January 1, 2027, so it can be installed in them until the stricter limits start on January 1, 2032[3], §84.54(c)(12).
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))[13].
US new-equipment rules (40 CFR 84.54)
R-449A contains HFC-32, HFC-125 and HFC-134a, regulated substances under the AIM Act[13], 42 U.S.C. 7675(c)(1). Under 40 CFR 84.64(b) its GWP is 1,396: 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.
| Effective | Equipment subsector | Limit | Restriction | ¶ |
|---|---|---|---|---|
| January 1, 2025 | Retail food refrigeration — stand-alone units | GWP ≥ 150 | Manufacture / import | (a)(4) |
| January 1, 2026 | Ice makers — batch type up to 1,000 lb of ice per 24 h and continuous type up to 1,200 lb per 24 h | GWP ≥ 150 | Manufacture / import | (a)(8)(i) |
| July 27, 2026 | Refrigerated transport — intermodal containers with a box temperature of −31°F (−35°C) or higher | GWP ≥ 700 | Manufacture / import | (a)(6) |
| July 27, 2026 | Refrigerated transport — intermodal containers with a box temperature of −31°F (−35°C) or higher | GWP ≥ 700 | Installation | (c)(7) |
| July 27, 2026 | Cold storage warehouse systems | GWP ≥ 700 | Installation | (c)(9)(i) |
| January 1, 2028 | Retail food refrigeration — stand-alone units | GWP ≥ 150 | Sale / distribution | (b) |
| January 1, 2029 | Ice makers — batch type up to 1,000 lb of ice per 24 h and continuous type up to 1,200 lb per 24 h | GWP ≥ 150 | Sale / distribution | (b) |
| July 27, 2029 | Refrigerated transport — intermodal containers with a box temperature of −31°F (−35°C) or higher | GWP ≥ 700 | Sale / distribution | (b) |
| January 1, 2032 | Retail food refrigeration — remote condensing units | GWP ≥ 150 (200 lb or greater, not the cascade high side); GWP ≥ 300 (less than 200 lb); GWP ≥ 300 (cascade high side) | Installation | (c)(11)(ii) |
| January 1, 2032 | Supermarket systems | GWP ≥ 150 (200 lb or greater, not the cascade high side); GWP ≥ 300 (less than 200 lb); GWP ≥ 300 (cascade high side) | Installation | (c)(12)(ii) |
| January 1, 2032 | Cold storage warehouse systems | GWP ≥ 150 (200 lb or greater, not the cascade high side); GWP ≥ 300 (less than 200 lb); GWP ≥ 300 (cascade high side) | Installation | (c)(9)(ii) |
- Installable in new retail food refrigeration — remote condensing units until January 1, 2032.
- Installable in new supermarket systems until January 1, 2032.
All 84.54 categories restricting R-449A (39)[3]
| Refrigeration, air conditioning & heat pumps (32) | |||
| January 1, 2025 | Self-contained residential & light-commercial AC and heat pump products | GWP ≥ 700 | (a)(1) |
| January 1, 2025 | Chillers for comfort cooling | GWP ≥ 700 | (a)(10)(i) |
| January 1, 2025 | Chillers for ice rinks | GWP ≥ 700 | (a)(10)(ii) |
| January 1, 2025 | Residential dehumidifiers | GWP ≥ 700 | (a)(2) |
| January 1, 2025 | Household refrigerators and freezers | GWP ≥ 150 | (a)(3) |
| January 1, 2025 | Retail food refrigeration — stand-alone units | GWP ≥ 150 | (a)(4) |
| January 1, 2025 | Vending machines | GWP ≥ 150 | (a)(5) |
| January 1, 2025 | Residential & light-commercial AC and heat pump systems (except VRF) | GWP ≥ 700 | (c)(1) |
| January 1, 2025 | Chillers for comfort cooling | GWP ≥ 700 | (c)(3) |
| January 1, 2025 | Ice rinks | GWP ≥ 700 | (c)(4) |
| January 1, 2026 | Chillers for industrial process refrigeration, fluid exiting the chiller warmer than −22°F (−30°C) | GWP ≥ 700 | (a)(10)(iii) |
| January 1, 2026 | Industrial 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, 2026 | Industrial 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, 2026 | Ice makers — batch type up to 1,000 lb of ice per 24 h and continuous type up to 1,200 lb per 24 h | GWP ≥ 150 | (a)(8)(i) |
| January 1, 2026 | Industrial 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 cascade | GWP ≥ 150 | (c)(10)(i) |
| January 1, 2026 | Industrial 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, 2026 | Industrial process refrigeration — high-temperature side of cascade systems, evaporator inlet warmer than −22°F (−30°C) | GWP ≥ 300 | (c)(10)(iii) |
| January 1, 2026 | Variable refrigerant flow (VRF) residential & light-commercial AC and heat pump systems | GWP ≥ 700 | (c)(2) |
| January 1, 2026 | Chillers for industrial process refrigeration, fluid exiting the chiller warmer than −22°F (−30°C) | GWP ≥ 700 | (c)(5)(i) |
| July 27, 2026 | Refrigerated transport — intermodal containers with a box temperature of −31°F (−35°C) or higher | GWP ≥ 700 | (a)(6) |
| July 27, 2026 | Refrigerated transport — intermodal containers with a box temperature of −31°F (−35°C) or higher | GWP ≥ 700 | (c)(7) |
| July 27, 2026 | Cold storage warehouse systems | GWP ≥ 700 | (c)(9)(i) |
| January 1, 2027 | Self-contained products in data center, information technology equipment facility, and computer room cooling | GWP ≥ 700 | (a)(11) |
| January 1, 2027 | Refrigerated food processing and dispensing products outside the scope of UL 621, charge 500 g or less | GWP ≥ 150 | (a)(9)(i) |
| January 1, 2027 | Data center, information technology equipment facility, and computer room cooling systems | GWP ≥ 700 | (c)(13) |
| January 1, 2028 | Chillers 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, 2028 | Industrial 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, 2028 | Industrial 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, 2028 | Chillers 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, 2032 | Retail food refrigeration — remote condensing units | GWP ≥ 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, 2032 | Supermarket systems | GWP ≥ 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, 2032 | Cold storage warehouse systems | GWP ≥ 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, 2024 | Motor 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 2028 | Motor 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 upfitters | GWP ≥ 150 | (a)(13)(ii) |
| January 1, 2028 | Motor 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, 2025 | Foam 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 foam | GWP ≥ 150 | (a)(14) |
| January 1, 2026 | Foam products in the (a)(14) formulations for use in space and military applications | GWP ≥ 150 | (a)(15) |
| Aerosol propellants / solvents (2) | |||
| January 1, 2025 | Aerosol products | GWP ≥ 150 | (a)(16)(i) |
| January 1, 2028 | Aerosol 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-449A 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-449A equipment in supermarket systems, refrigerated transport or automatic commercial ice makers must be done with reclaimed refrigerant[7].
EU (retail-food / cold-storage)
Under Regulation (EU) No 517/2014, since replaced by (EU) 2024/573, applying from March 11, 2024 (compared against the AR4 headline GWP), R-449A's GWP is at or above the limit in:
- Annex III row 11: Refrigerators and freezers for commercial use (hermetically sealed equipment) — GWP ≥ 150, from January 1, 2022.
- Annex III row 13: Multipack centralised refrigeration systems for commercial use with a rated capacity of 40 kW or more — GWP ≥ 150, from January 1, 2022 (the primary refrigerant circuit of a cascade system may use GWP below 1,500).
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
Retrofit and replacement paths
R-449A replaces
Replacements for R-449A
Reading the R-449A PT chart
R-449A is a zeotropic blend with a 9.5°F glide at a 40°F dew point[5], so the table shows bubble and dew columns. For superheat measurement use the dew curve at suction pressure; for subcooling measurement use the bubble curve at discharge pressure.[10], “When setting superheat, the dew point (saturated vapor)…”
R-449A vs R-404A, R-22, R-454C, R-455A: saturation pressure
| Temp | R-449A | R-404A | R-22 | R-454C | R-455A |
|---|---|---|---|---|---|
| 0°F | 24.2 / 33.4 | 33.7(+1%) | 24.0(−28%) | 19.9 / 31.8(−5%) | 22.3 / 44.1(+32%) |
| 40°F | 71.6 / 87.4 | 86.9(−1%) | 68.6(−22%) | 61.5 / 82.4(−6%) | 66.9 / 103.3(+18%) |
| 70°F | 129.4 / 151.0 | 149.3(−1%) | 121.4(−20%) | 112.2 / 141.2(−6%) | 121.1 / 170.1(+13%) |
| 100°F | 212.7 / 240.0 | 236.8(−1%) | 195.9(−18%) | 185.1 / 222.5(−7%) | 199.6 / 260.7(+9%) |
Frequently asked
›What is the normal operating pressure of R-449A?
Operating pressure depends on evaporator load and ambient; for suction and discharge by outdoor temperature, see What pressure should R-449A be?. The saturation pressures are in the PT table and the comparison table on this page.
›What's the difference between R-448A and R-449A?
›What does R-449A's GWP of 1,396 mean?
Its GWP of 1,396 means 1 kg released has about 1,396 times the 100-year warming effect of 1 kg of CO₂[16][9]. That is about 64% lower than R-404A's 3,922.[9]
The reduction is significant but does not clear the 150-GWP threshold that Regulation (EU) No 517/2014, since replaced by (EU) 2024/573 applying from March 11, 2024, applies to commercial refrigerators and freezers (row 11) and to multipack centralised systems of 40 kW or more (row 13) from 2022[4].[4], Annex III rows 11 and 13
›How do I measure superheat on R-449A?
›What lubricant does R-449A use?
›Is R-449A safe to handle?
ASHRAE safety group A1: lower toxicity and no flame propagation[2]. No A2L-specific requirements.
Sources & citations
- [1]Opteon™ XP40 Pressure-Temperature Data (Eng). Chemours. C-10270 (7/23). https://www.opteon.com/en/-/media/files/opteon/opteon-xp40-pressure-temperature-chart.pdf (accessed October 5, 2026)
- [2]ANSI/ASHRAE Standard 34-2022, Designation and Safety Classification of Refrigerants (free read-only version). ASHRAE. 2022. https://www.ashrae.org/technical-resources/standards-and-guidelines/read-only-versions-of-ashrae-standards (accessed October 2, 2026)
- [3]40 CFR 84.54 — Restrictions on the use of hydrofluorocarbons. eCFR (Office of the Federal Register). up to date as of 9/29/2026. https://www.ecfr.gov/current/title-40/chapter-I/subchapter-C/part-84/subpart-B/section-84.54 (accessed October 2, 2026)
- [4]Regulation (EU) No 517/2014 on fluorinated greenhouse gases. EUR-Lex. OJ L 150, 20.5.2014 (replaced by (EU) 2024/573 from March 11, 2024). https://eur-lex.europa.eu/legal-content/EN/TXT/PDF/?uri=CELEX:32014R0517 (accessed October 2, 2026)
- [5]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
- [6]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)
- [7]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
- [8]ASHRAE Refrigerant Designations. ASHRAE. web page, updated May 25, 2021. https://www.ashrae.org/technical-resources/standards-and-guidelines/ashrae-refrigerant-designations (accessed October 2, 2026)
- [9]Technology Transitions GWP Reference Table. US EPA. updated April 2, 2026. https://www.epa.gov/hfcs/technology-transitions-gwp-reference-table (accessed October 2, 2026)
- [10]Opteon™ XP40 Retrofit Guidelines to Replace R-404A/R-507. Chemours. C-10023 (1/16). https://www.opteon.com/en/-/media/files/opteon/opteon-xp40-retrofit-guidelines-r-404a-r-507.pdf (accessed October 5, 2026)
- [11]Substitutes in Typical Supermarket Systems. US EPA (SNAP). last updated March 20, 2026. https://www.epa.gov/snap/substitutes-typical-supermarket-systems (accessed October 5, 2026)
- [12]Substitutes in Cold Storage Warehouses. US EPA (SNAP). last updated March 19, 2026. https://www.epa.gov/snap/substitutes-cold-storage-warehouses (accessed October 5, 2026)
- [13]42 U.S.C. 7675 — American Innovation and Manufacturing Act. US Code (via Cornell LII). current. https://www.law.cornell.edu/uscode/text/42/7675 (accessed October 2, 2026)
- [14]Solstice® N40 (R-448A). Solstice Advanced Materials. product page. https://www.solstice.com/us/en/products/air-conditioning-refrigeration-and-heating/solstice-hfo-blends/solstice-n40-r-448a (accessed October 5, 2026)
- [15]Refrigerants and lubricants approved for use in Copeland compressors. Copeland. Form 93-11 R41 (5/24). https://webapps.copeland.com/online-product-information/Publication/LaunchPDF?Index=AEB&PDF=93-11 (accessed October 2, 2026)
- [16]Understanding Global Warming Potentials. US EPA. last updated December 29, 2025. https://www.epa.gov/ghgemissions/understanding-global-warming-potentials (accessed October 2, 2026)