RefrigerantASHRAE R-245fa

R245fa PT Chart

Q: What's an organic Rankine cycle (ORC)?

A thermodynamic power cycle using an organic working fluid (refrigerant-class molecule) instead of water. Waste heat (geothermal, industrial process exhaust, biomass combustion, solar thermal) at moderate temperature (80-300°C) vaporizes the working fluid; the vapor expands through a turbine to generate electrical power; the exhaust condenses back to liquid for return to the boiler. ORC enables electricity generation from heat sources too cool for steam Rankine cycles. R-245fa is used as an ORC working fluid for the 100-200°C heat-source range, in geothermal power and industrial waste-heat-recovery systems.

Q: What does B1 safety classification mean?

ASHRAE 34's safety classification has two letters/numbers: the letter (A/B) indicates toxicity (A = lower, B = higher chronic toxicity); the number indicates flammability (1 = non-flammable, 2L/2/3 = increasingly flammable). B1 means higher chronic toxicity AND non-flammable. R-245fa's B1 classification reflects the long-term inhalation hazard at sustained concentrations — not acute hazard, but enough to require machine-room ventilation and leak-detection per ASHRAE 15. Service personnel use standard industrial hygiene practices (avoid prolonged direct inhalation, ventilate during service).

Q: Why is R-245fa being replaced by R-1233zd(E)?

Three reasons: (1) GWP — R-245fa is 1,030; R-1233zd(E) is 4. The GWP reduction is the main driver; (2) safety class — R-245fa is B1 (higher toxicity, B-class chronic exposure concerns); R-1233zd(E) is A1 (lower toxicity, simpler machine-room requirements); (3) pressure envelope — R-1233zd(E) closely matches R-245fa, simplifying retrofit and equipment redesign. The replacement is well underway; new installations specify R-1233zd(E) for both ORC and chiller applications.

Q: What lubricant does R-245fa use?

Polyolester (POE) oil. Mineral oil is incompatible. Some ORC systems use different lubricant chemistries due to the specific operating envelope; consult OEM service literature for application-specific requirements.

Q: What is the GWP of R-245fa?

1,030. Moderate by HFC standards — comparable to R-134a (1,430), below R-125 (3,500) and R-404A (3,922). The 7.9-year atmospheric lifetime is short for an HFC, keeping the GWP from being higher.

Updated October 12, 2026

R-245fa

B1 Higher toxicity, no flame propagationHFC (pure) AIM Act HFC

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-245fa, safety class B1, GWP 1,030. No red band: AHRI Guideline N-2017 reserves it for flammable refrigerants^{[1], section 4.7}.

CHF2CH2CF3

Pure HFC, 1,1,1,3,3-pentafluoropropane (CHF₂CH₂CF₃). Honeywell Genetron 245fa; foam-blowing variant Enovate 3000. ASHRAE B1 (higher toxicity classification). GWP 1,030. Normal boiling +59°F. An organic Rankine cycle working fluid; also low-pressure centrifugal chillers and foam blowing agent.

R-245fa saturation pressure is 10.7 in. Hg vacuum at 40°F, 3.9 PSIG at 70°F, and 19.1 PSIG at 100°F. These are the gauge readings on a static, fully-saturated system; a running system's high side sits well above them. 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

3.9 PSIG

GWP (100-yr)

1,030 AIM Act exchange value (IPCC AR4)

Boiling point

59.1°F

R-245fa PT calculator Superheat

R-245fa PT chart — printable saturation table

Looking for the R-245fa 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-245fa PT Chart — Pressure-Temperature Saturation Table

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

R-245fa · 1° increments · °F / PSIG

Tinted rows: NBP atmospheric crossover · 32°F H₂O freeze

R-245fa pressure-temperature saturation table in Fahrenheit and PSIG
Temp (°F)	Pressure (PSIG)
−40°F	28.2 in. Hg vac.
−39°F	28.1 in. Hg vac.
−38°F	28.1 in. Hg vac.
−37°F	28.0 in. Hg vac.
−36°F	27.9 in. Hg vac.
−35°F	27.8 in. Hg vac.
−34°F	27.8 in. Hg vac.
−33°F	27.7 in. Hg vac.
−32°F	27.6 in. Hg vac.
−31°F	27.5 in. Hg vac.
−30°F	27.4 in. Hg vac.
−29°F	27.4 in. Hg vac.
−28°F	27.3 in. Hg vac.
−27°F	27.2 in. Hg vac.
−26°F	27.1 in. Hg vac.
−25°F	27.0 in. Hg vac.
−24°F	26.9 in. Hg vac.
−23°F	26.8 in. Hg vac.
−22°F	26.7 in. Hg vac.
−21°F	26.6 in. Hg vac.
−20°F	26.4 in. Hg vac.
−19°F	26.3 in. Hg vac.
−18°F	26.2 in. Hg vac.
−17°F	26.1 in. Hg vac.
−16°F	25.9 in. Hg vac.
−15°F	25.8 in. Hg vac.
−14°F	25.7 in. Hg vac.
−13°F	25.5 in. Hg vac.
−12°F	25.4 in. Hg vac.
−11°F	25.3 in. Hg vac.
−10°F	25.1 in. Hg vac.
−9°F	25.0 in. Hg vac.
−8°F	24.8 in. Hg vac.
−7°F	24.6 in. Hg vac.
−6°F	24.5 in. Hg vac.
−5°F	24.3 in. Hg vac.
−4°F	24.1 in. Hg vac.
−3°F	24.0 in. Hg vac.
−2°F	23.8 in. Hg vac.
−1°F	23.6 in. Hg vac.
0°F	23.4 in. Hg vac.
1°F	23.2 in. Hg vac.
2°F	23.0 in. Hg vac.
3°F	22.8 in. Hg vac.
4°F	22.6 in. Hg vac.
5°F	22.4 in. Hg vac.
6°F	22.1 in. Hg vac.
7°F	21.9 in. Hg vac.
8°F	21.7 in. Hg vac.
9°F	21.4 in. Hg vac.
10°F	21.2 in. Hg vac.
11°F	20.9 in. Hg vac.
12°F	20.7 in. Hg vac.
13°F	20.4 in. Hg vac.
14°F	20.2 in. Hg vac.
15°F	19.9 in. Hg vac.
16°F	19.6 in. Hg vac.
17°F	19.3 in. Hg vac.
18°F	19.0 in. Hg vac.
19°F	18.7 in. Hg vac.
20°F	18.4 in. Hg vac.
21°F	18.1 in. Hg vac.
22°F	17.8 in. Hg vac.
23°F	17.5 in. Hg vac.
24°F	17.1 in. Hg vac.
25°F	16.8 in. Hg vac.
26°F	16.4 in. Hg vac.
27°F	16.1 in. Hg vac.
28°F	15.7 in. Hg vac.
29°F	15.3 in. Hg vac.
30°F	15.0 in. Hg vac.
31°F	14.6 in. Hg vac.
32°F H₂O freeze	14.2 in. Hg vac.
33°F	13.8 in. Hg vac.
34°F	13.4 in. Hg vac.
35°F	13.0 in. Hg vac.
36°F	12.5 in. Hg vac.
37°F	12.1 in. Hg vac.
38°F	11.6 in. Hg vac.
39°F	11.2 in. Hg vac.
40°F	10.7 in. Hg vac.
41°F	10.3 in. Hg vac.
42°F	9.8 in. Hg vac.
43°F	9.3 in. Hg vac.
44°F	8.8 in. Hg vac.
45°F	8.3 in. Hg vac.
46°F	7.8 in. Hg vac.
47°F	7.2 in. Hg vac.
48°F	6.7 in. Hg vac.
49°F	6.1 in. Hg vac.
50°F	5.6 in. Hg vac.
51°F	5.0 in. Hg vac.
52°F	4.4 in. Hg vac.
53°F	3.8 in. Hg vac.
54°F	3.2 in. Hg vac.
55°F	2.6 in. Hg vac.
56°F	2.0 in. Hg vac.
57°F	1.4 in. Hg vac.
58°F	0.7 in. Hg vac.
59°F NBP (atmospheric)	0.1 in. Hg vac.
60°F	0.3
61°F	0.6
62°F	1.0
63°F	1.3
64°F	1.7
65°F	2.0
66°F	2.4
67°F	2.8
68°F	3.2
69°F	3.5
70°F	3.9
71°F	4.3
72°F	4.7
73°F	5.1
74°F	5.6
75°F	6.0
76°F	6.4
77°F	6.9
78°F	7.3
79°F	7.8
80°F	8.2
81°F	8.7
82°F	9.2
83°F	9.6
84°F	10.1
85°F	10.6
86°F	11.1
87°F	11.6
88°F	12.2
89°F	12.7
90°F	13.2
91°F	13.8
92°F	14.3
93°F	14.9
94°F	15.5
95°F	16.0
96°F	16.6
97°F	17.2
98°F	17.8
99°F	18.5
100°F	19.1
101°F	19.7
102°F	20.3
103°F	21.0
104°F	21.7
105°F	22.3
106°F	23.0
107°F	23.7
108°F	24.4
109°F	25.1
110°F	25.8
111°F	26.5
112°F	27.3
113°F	28.0
114°F	28.8
115°F	29.6
116°F	30.3
117°F	31.1
118°F	31.9
119°F	32.7
120°F	33.6
121°F	34.4
122°F	35.2
123°F	36.1
124°F	36.9
125°F	37.8
126°F	38.7
127°F	39.6
128°F	40.5
129°F	41.4
130°F	42.4
131°F	43.3
132°F	44.3
133°F	45.2
134°F	46.2
135°F	47.2
136°F	48.2
137°F	49.2
138°F	50.3
139°F	51.3
140°F	52.4
141°F	53.4
142°F	54.5
143°F	55.6
144°F	56.7
145°F	57.9
146°F	59.0
147°F	60.1
148°F	61.3
149°F	62.5
150°F	63.7

R-245fa pressure-temperature saturation table in Celsius and kPa
Temp (°C)	Pressure (kPa)
−40°C	−95
−39°C	−95
−38°C	−95
−37°C	−94
−36°C	−94
−35°C	−93
−34°C	−93
−33°C	−92
−32°C	−92
−31°C	−91
−30°C	−90
−29°C	−90
−28°C	−89
−27°C	−88
−26°C	−87
−25°C	−87
−24°C	−86
−23°C	−85
−22°C	−84
−21°C	−83
−20°C	−82
−19°C	−81
−18°C	−79
−17°C	−78
−16°C	−77
−15°C	−76
−14°C	−74
−13°C	−73
−12°C	−71
−11°C	−70
−10°C	−68
−9°C	−67
−8°C	−65
−7°C	−63
−6°C	−61
−5°C	−59
−4°C	−57
−3°C	−55
−2°C	−53
−1°C	−50
0°C H₂O freeze	−48
1°C	−46
2°C	−43
3°C	−40
4°C	−38
5°C	−35
6°C	−32
7°C	−29
8°C	−26
9°C	−22
10°C	−19
11°C	−15
12°C	−12
13°C	−8
14°C	−4
15°C NBP (atmospheric)	0
16°C	4
17°C	8
18°C	13
19°C	17
20°C	22
21°C	27
22°C	31
23°C	37
24°C	42
25°C	47
26°C	53
27°C	59
28°C	64
29°C	71
30°C	77
31°C	83
32°C	90
33°C	97
34°C	103
35°C	111
36°C	118
37°C	126
38°C	133
39°C	141
40°C	149
41°C	158
42°C	166
43°C	175
44°C	184
45°C	193
46°C	203
47°C	212
48°C	222
49°C	232
50°C	243
51°C	254
52°C	264
53°C	276
54°C	287
55°C	299
56°C	311
57°C	323
58°C	335
59°C	348
60°C	361
61°C	374
62°C	388
63°C	402
64°C	416
65°C	431
66°C	446

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-245fa PT chart data: CoolProp 7.2.0 (published Helmholtz equations of state / mixture models — see the source citations above).

Higher toxicity, no flame propagation

Higher toxicity (Occupational Exposure Limit < 400 ppm). No flame propagation. R-123, R-245fa, R-514A are B1.

Flammability: None
Toxicity: Higher (OEL < 400 ppm)

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

Saturation pressure-temperature curve

Pressure

Temperature

Highlight at°F

Quick lookup — R-245fa

Temp:°F

3.9PSIG(27 kPa)

Range: −40 to 150°F Open full PT calculator →

Common service temperatures

32°F

−7PSIG

Freezing

45°F

−4PSIG

Heat-pump heat

70°F

4PSIG

Standard

75°F

6PSIG

Test ref

80°F

8PSIG

Warm

95°F

16PSIG

Summer peak

Saturation values from CoolProp 7.2.0^[3]. Operating pressure on a running system differs — see the operating-pressure references for in-use values.

At a glance

Chemistry

CHF2CH2CF3

1,1,1,3,3-Pentafluoropropane

Lubricant compatibility

POEMO

Low-pressure HFC for organic Rankine cycle and centrifugal chillers. Class B1 indicates higher toxicity than typical HFCs.

Trade names

Genetron 245fa — Honeywell
Enovate 3000 — Honeywell (foam blowing)

Common applications

Organic Rankine cycle (geothermal, waste heat recovery)
Low-pressure centrifugal chillers
Foam blowing agent (polyurethane)

Properties

Boiling point (1 atm)
59.1°F (15.0°C)
Critical point
308.9°F (153.9°C) at 515 PSIG
Molar mass
134.05 g/mol
ODP
0
GWP (100-yr)
1,030 AIM Act exchange value (IPCC AR4) IPCC: AR4 1,030 · AR5 858 · AR6 962
Atmospheric lifetime
7.9 years
New-equipment status (US)
Restricted in 39 new-equipment categories — US new-equipment rules (40 CFR 84.54).

What is R-245fa?

R-245fa is 1,1,1,3,3-pentafluoropropane — a pure HFC with relatively high boiling point (+59°F) and B1 safety classification. The B1 indicates higher chronic toxicity than the more typical A1 HFCs — refrigerant concentration limits per ASHRAE 34 are lower, and machine-room ventilation requirements per ASHRAE 15 are more stringent. The "fa" suffix indicates the specific fluorination isomer (1,1,1,3,3-position).

R-245fa's commercial role is concentrated in three areas: (1) organic Rankine cycle (ORC) systems for geothermal and waste-heat-recovery power generation; (2) low-pressure centrifugal chillers as a partial R-123 substitute (with lower toxicity than R-123's B1 inherent profile, in some configurations); (3) foam blowing agent for polyurethane insulation under the Honeywell Enovate 3000 brand. ORC is the main application — geothermal power plants and industrial waste-heat-recovery systems use R-245fa because its boiling point and pressure envelope match the heat-source temperatures available.

Where R-245fa is used

Organic Rankine cycle (ORC) — geothermal power plants, industrial waste heat recovery, biomass combustion
Low-pressure centrifugal chillers
Foam blowing agent for polyurethane insulation (Enovate 3000)
Specialty heat-pump applications (medium-temperature range)

Regulatory & phase-down status

R-245fa's GWP of 1,030 places it within AIM Act phase-down scope. The replacement trajectory for ORC and chiller applications is toward R-1233zd(E) (GWP 4, A1, similar pressure envelope) and R-1336mzz(Z) (GWP 2, A1, higher-temperature applications). The foam-blowing market has largely transitioned to R-1233zd(E) (Honeywell Solstice LBA) and other low-GWP blowing agents.

New ORC installations specify R-1233zd(E) or R-1336mzz(Z).

Service notes

POE oil is standard. Mineral oil is not used. B1 toxicity classification requires: (1) machine-room ventilation per ASHRAE 15 with B1-appropriate design; (2) leak detection with sensors set below the B1 refrigerant concentration limit; (3) industrial hygiene practices during service (avoid prolonged inhalation, use fume extraction during repairs).

R-245fa is a low-pressure refrigerant — saturation pressures at typical operating temperatures may be sub-atmospheric on the evaporator side. Leak prevention is critical for air-ingress reasons (air contamination of the system) as well as for personnel exposure protection. EPA Section 608 Type I or Universal certification covers R-245fa for refrigeration applications; the ORC and foam-blowing applications have separate regulatory frameworks.

Operating cycle

Phase-down timeline

R-245fa is a regulated substance under the AIM Act. Its GWP under 40 CFR 84.64 is 1,030, at or above the limit in 39 of the categories 40 CFR 84.54 restricts (listed under “All 84.54 categories restricting R-245fa”).

From January 1, 2025 — new chillers for comfort cooling: manufacture / import restricted (GWP ≥ 700).
From January 1, 2025 — new 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: manufacture / import restricted (GWP ≥ 150).
From January 1, 2025 — new chillers for comfort cooling: installation restricted (GWP ≥ 700).
From January 1, 2026 — new chillers for industrial process refrigeration, fluid exiting the chiller warmer than −22°F (−30°C): manufacture / import restricted (GWP ≥ 700).
From January 1, 2026 — new foam products in the (a)(14) formulations for use in space and military applications: manufacture / import restricted (GWP ≥ 150).
From January 1, 2026 — new chillers for industrial process refrigeration, fluid exiting the chiller warmer than −22°F (−30°C): installation restricted (GWP ≥ 700).
From January 1, 2028 — new chillers for industrial process refrigeration, fluid exiting the chiller from −58°F to −22°F (−50°C to −30°C): manufacture / import restricted (GWP ≥ 700).
From January 1, 2028 — new chillers for comfort cooling: sale and distribution restricted (GWP ≥ 700).
From January 1, 2028 — new chillers for industrial process refrigeration, fluid exiting the chiller from −58°F to −22°F (−50°C to −30°C): installation 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-245fa →

US new-equipment rules (40 CFR 84.54)

R-245fa is a regulated substance under the AIM Act. Under 40 CFR 84.64(a) its GWP is 1,030, the AIM Act exchange value. That value is compared against each 40 CFR 84.54 subsector limit below.

Effective	Equipment subsector	Limit	Restriction	¶
January 1, 2025	Chillers for comfort cooling	GWP ≥ 700	Manufacture / import	(a)(10)(i)
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	Manufacture / import	(a)(14)
January 1, 2025	Chillers for comfort cooling	GWP ≥ 700	Installation	(c)(3)
January 1, 2026	Chillers for industrial process refrigeration, fluid exiting the chiller warmer than −22°F (−30°C)	GWP ≥ 700	Manufacture / import	(a)(10)(iii)
January 1, 2026	Foam products in the (a)(14) formulations for use in space and military applications	GWP ≥ 150	Manufacture / import	(a)(15)
January 1, 2026	Chillers for industrial process refrigeration, fluid exiting the chiller warmer than −22°F (−30°C)	GWP ≥ 700	Installation	(c)(5)(i)
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	Manufacture / import	(a)(10)(iv)
January 1, 2028	Chillers for comfort cooling	GWP ≥ 700	Sale / distribution	(b)
January 1, 2028	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	Sale / distribution	(b)
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	Installation	(c)(6)(i)
January 1, 2029	Chillers for industrial process refrigeration, fluid exiting the chiller warmer than −22°F (−30°C)	GWP ≥ 700	Sale / distribution	(b)
January 1, 2029	Foam products in the (a)(14) formulations for use in space and military applications	GWP ≥ 150	Sale / distribution	(b)
January 1, 2031	Chillers for industrial process refrigeration, fluid exiting the chiller from −58°F to −22°F (−50°C to −30°C)	GWP ≥ 700	Sale / distribution	(b)

All 84.54 categories restricting R-245fa (39)

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-245fa 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-245fa 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

Retrofit and replacement paths

Replacements for R-245fa

R-245fa vs R-1233zd(E), R-1336mzz(Z): saturation pressure

Saturation pressure (PSIG, gauge) for R-245fa vs R-1233zd(E), R-1336mzz(Z). Each column shows the percent difference from R-245fa. Sources: R-245fa and R-1233zd(E): CoolProp 7.2.0 dataset; R-1336mzz(Z): CoolProp 8.0.0 dataset.
Temp	R-245fa	R-1233zd(E)	R-1336mzz(Z)
0°F	23.4 in. Hg vac.	23.8 in. Hg vac.	27.1 in. Hg vac.
40°F	10.7 in. Hg vac.	12.7 in. Hg vac.	20.9 in. Hg vac.
70°F	3.9	1.6	11.3 in. Hg vac.
100°F	19.1	14.4(−24%)	2.5(−87%)

Frequently asked

›What's an organic Rankine cycle (ORC)?

A thermodynamic power cycle using an organic working fluid (refrigerant-class molecule) instead of water. Waste heat (geothermal, industrial process exhaust, biomass combustion, solar thermal) at moderate temperature (80-300°C) vaporizes the working fluid; the vapor expands through a turbine to generate electrical power; the exhaust condenses back to liquid for return to the boiler. ORC enables electricity generation from heat sources too cool for steam Rankine cycles. R-245fa is used as an ORC working fluid for the 100-200°C heat-source range, in geothermal power and industrial waste-heat-recovery systems.

›What does B1 safety classification mean?

ASHRAE 34's safety classification has two letters/numbers: the letter (A/B) indicates toxicity (A = lower, B = higher chronic toxicity); the number indicates flammability (1 = non-flammable, 2L/2/3 = increasingly flammable). B1 means higher chronic toxicity AND non-flammable. R-245fa's B1 classification reflects the long-term inhalation hazard at sustained concentrations — not acute hazard, but enough to require machine-room ventilation and leak-detection per ASHRAE 15. Service personnel use standard industrial hygiene practices (avoid prolonged direct inhalation, ventilate during service).

›Why is R-245fa being replaced by R-1233zd(E)?