RefrigerantASHRAE R-1224yd(Z)

R1224yd(Z) PT Chart

Updated October 12, 2026

R-1224yd(Z)

A1 Lower toxicity, no flame propagationHCFO

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-1224yd(Z), safety class A1, GWP 1. No red band: AHRI Guideline N-2017 reserves it for flammable refrigerants^{[1], section 4.7}.

CF3CF=CHCl (Z isomer)

Pure HCFO (hydrochlorofluoroolefin) — cis-1-chloro-2,3,3,3-tetrafluoro-1-propene. AGC Chemicals AMOLEA 1224yd. ASHRAE A1, GWP 1, ODP 0.00012. Designed as a replacement for R-123 in low-pressure centrifugal chillers.

R-1224yd(Z) saturation pressure is 10.3 in. Hg vacuum at 40°F, 3.9 PSIG at 70°F, and 18.2 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 US EPA value, 40 CFR 84.64(b)

Boiling point

58.7°F

R-1224yd(Z) PT calculator Superheat

R-1224yd(Z) PT chart — printable saturation table

Looking for the R-1224yd(Z) 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-1224yd(Z) PT Chart — Pressure-Temperature Saturation Table

Computed with CoolProp 8.0.0 in 1°F steps · hvacptcharts.com

R-1224yd(Z) · 1° increments · °F / PSIG

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

R-1224yd(Z) pressure-temperature saturation table in Fahrenheit and PSIG
Temp (°F)	Pressure (PSIG)
−40°F	28.0 in. Hg vac.
−39°F	27.9 in. Hg vac.
−38°F	27.8 in. Hg vac.
−37°F	27.8 in. Hg vac.
−36°F	27.7 in. Hg vac.
−35°F	27.6 in. Hg vac.
−34°F	27.5 in. Hg vac.
−33°F	27.4 in. Hg vac.
−32°F	27.4 in. Hg vac.
−31°F	27.3 in. Hg vac.
−30°F	27.2 in. Hg vac.
−29°F	27.1 in. Hg vac.
−28°F	27.0 in. Hg vac.
−27°F	26.9 in. Hg vac.
−26°F	26.8 in. Hg vac.
−25°F	26.7 in. Hg vac.
−24°F	26.6 in. Hg vac.
−23°F	26.5 in. Hg vac.
−22°F	26.3 in. Hg vac.
−21°F	26.2 in. Hg vac.
−20°F	26.1 in. Hg vac.
−19°F	26.0 in. Hg vac.
−18°F	25.9 in. Hg vac.
−17°F	25.7 in. Hg vac.
−16°F	25.6 in. Hg vac.
−15°F	25.5 in. Hg vac.
−14°F	25.3 in. Hg vac.
−13°F	25.2 in. Hg vac.
−12°F	25.0 in. Hg vac.
−11°F	24.9 in. Hg vac.
−10°F	24.7 in. Hg vac.
−9°F	24.6 in. Hg vac.
−8°F	24.4 in. Hg vac.
−7°F	24.2 in. Hg vac.
−6°F	24.1 in. Hg vac.
−5°F	23.9 in. Hg vac.
−4°F	23.7 in. Hg vac.
−3°F	23.5 in. Hg vac.
−2°F	23.3 in. Hg vac.
−1°F	23.1 in. Hg vac.
0°F	22.9 in. Hg vac.
1°F	22.7 in. Hg vac.
2°F	22.5 in. Hg vac.
3°F	22.3 in. Hg vac.
4°F	22.1 in. Hg vac.
5°F	21.9 in. Hg vac.
6°F	21.7 in. Hg vac.
7°F	21.4 in. Hg vac.
8°F	21.2 in. Hg vac.
9°F	20.9 in. Hg vac.
10°F	20.7 in. Hg vac.
11°F	20.4 in. Hg vac.
12°F	20.2 in. Hg vac.
13°F	19.9 in. Hg vac.
14°F	19.6 in. Hg vac.
15°F	19.4 in. Hg vac.
16°F	19.1 in. Hg vac.
17°F	18.8 in. Hg vac.
18°F	18.5 in. Hg vac.
19°F	18.2 in. Hg vac.
20°F	17.9 in. Hg vac.
21°F	17.6 in. Hg vac.
22°F	17.3 in. Hg vac.
23°F	16.9 in. Hg vac.
24°F	16.6 in. Hg vac.
25°F	16.3 in. Hg vac.
26°F	15.9 in. Hg vac.
27°F	15.6 in. Hg vac.
28°F	15.2 in. Hg vac.
29°F	14.8 in. Hg vac.
30°F	14.4 in. Hg vac.
31°F	14.1 in. Hg vac.
32°F H₂O freeze	13.7 in. Hg vac.
33°F	13.3 in. Hg vac.
34°F	12.9 in. Hg vac.
35°F	12.4 in. Hg vac.
36°F	12.0 in. Hg vac.
37°F	11.6 in. Hg vac.
38°F	11.2 in. Hg vac.
39°F	10.7 in. Hg vac.
40°F	10.3 in. Hg vac.
41°F	9.8 in. Hg vac.
42°F	9.3 in. Hg vac.
43°F	8.8 in. Hg vac.
44°F	8.3 in. Hg vac.
45°F	7.8 in. Hg vac.
46°F	7.3 in. Hg vac.
47°F	6.8 in. Hg vac.
48°F	6.3 in. Hg vac.
49°F	5.7 in. Hg vac.
50°F	5.2 in. Hg vac.
51°F	4.6 in. Hg vac.
52°F	4.1 in. Hg vac.
53°F	3.5 in. Hg vac.
54°F	2.9 in. Hg vac.
55°F	2.3 in. Hg vac.
56°F	1.7 in. Hg vac.
57°F	1.1 in. Hg vac.
58°F	0.5 in. Hg vac.
59°F NBP (atmospheric)	0.1
60°F	0.4
61°F	0.7
62°F	1.1
63°F	1.4
64°F	1.7
65°F	2.1
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	5.5
75°F	5.9
76°F	6.3
77°F	6.7
78°F	7.1
79°F	7.5
80°F	8.0
81°F	8.4
82°F	8.9
83°F	9.3
84°F	9.8
85°F	10.3
86°F	10.8
87°F	11.2
88°F	11.7
89°F	12.2
90°F	12.7
91°F	13.3
92°F	13.8
93°F	14.3
94°F	14.9
95°F	15.4
96°F	15.9
97°F	16.5
98°F	17.1
99°F	17.7
100°F	18.2
101°F	18.8
102°F	19.4
103°F	20.0
104°F	20.7
105°F	21.3
106°F	21.9
107°F	22.6
108°F	23.2
109°F	23.9
110°F	24.5
111°F	25.2
112°F	25.9
113°F	26.6
114°F	27.3
115°F	28.0
116°F	28.7
117°F	29.5
118°F	30.2
119°F	31.0
120°F	31.7
121°F	32.5
122°F	33.3
123°F	34.0
124°F	34.8
125°F	35.7
126°F	36.5
127°F	37.3
128°F	38.1
129°F	39.0
130°F	39.8
131°F	40.7
132°F	41.6
133°F	42.5
134°F	43.4
135°F	44.3
136°F	45.2
137°F	46.1
138°F	47.1
139°F	48.0
140°F	49.0
141°F	50.0
142°F	51.0
143°F	52.0
144°F	53.0
145°F	54.0
146°F	55.0
147°F	56.1
148°F	57.1
149°F	58.2
150°F	59.3

R-1224yd(Z) pressure-temperature saturation table in Celsius and kPa
Temp (°C)	Pressure (kPa)
−40°C	−95
−39°C	−94
−38°C	−94
−37°C	−93
−36°C	−93
−35°C	−92
−34°C	−92
−33°C	−91
−32°C	−91
−31°C	−90
−30°C	−89
−29°C	−89
−28°C	−88
−27°C	−87
−26°C	−86
−25°C	−85
−24°C	−84
−23°C	−83
−22°C	−82
−21°C	−81
−20°C	−80
−19°C	−79
−18°C	−78
−17°C	−77
−16°C	−75
−15°C	−74
−14°C	−73
−13°C	−71
−12°C	−70
−11°C	−68
−10°C	−67
−9°C	−65
−8°C	−63
−7°C	−61
−6°C	−59
−5°C	−57
−4°C	−55
−3°C	−53
−2°C	−51
−1°C	−49
0°C H₂O freeze	−46
1°C	−44
2°C	−41
3°C	−39
4°C	−36
5°C	−33
6°C	−30
7°C	−27
8°C	−24
9°C	−21
10°C	−18
11°C	−14
12°C	−11
13°C	−7
14°C	−3
15°C NBP (atmospheric)	1
16°C	5
17°C	9
18°C	13
19°C	17
20°C	22
21°C	26
22°C	31
23°C	36
24°C	41
25°C	46
26°C	51
27°C	57
28°C	63
29°C	68
30°C	74
31°C	80
32°C	86
33°C	93
34°C	99
35°C	106
36°C	113
37°C	120
38°C	127
39°C	135
40°C	142
41°C	150
42°C	158
43°C	166
44°C	175
45°C	183
46°C	192
47°C	201
48°C	210
49°C	220
50°C	229
51°C	239
52°C	249
53°C	259
54°C	270
55°C	281
56°C	292
57°C	303
58°C	314
59°C	326
60°C	338
61°C	350
62°C	363
63°C	375
64°C	388
65°C	401
66°C	415

CoolProp 8.0.0 · 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-1224yd(Z) PT chart data: CoolProp 8.0.0 (published Helmholtz equations of state / mixture models — see the source citations above).

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

Highlight at°F

Quick lookup — R-1224yd(Z)

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

15PSIG

Summer peak

Saturation values from CoolProp 8.0.0^[2].

Equation-of-state and mixture-model references

Equation of state: Akasaka, R.; Lemmon, E. W. A Helmholtz Energy Equation of State for cis-1-Chloro-2,3,3,3-tetrafluoro-1-propene [R-1224yd(Z)]. Int. J. Thermophys. 44, 166 (2023). https://doi.org/10.1007/s10765-023-03266-3

At a glance

Chemistry

CF3CF=CHCl (Z isomer)

(Z)-1-Chloro-2,3,3,3-tetrafluoro-1-propene

Lubricant compatibility

POEPVEMO

Designed as a low-GWP replacement for R-123 in low-pressure centrifugal chillers.

Trade names

AMOLEA 1224yd — AGC Chemicals

Common applications

Low-pressure centrifugal chillers (high-tonnage commercial)
Industrial cooling

Properties

Boiling point (1 atm)
58.7°F (14.9°C)
Critical point
312.0°F (155.5°C) at 469 PSIG
Molar mass
148.49 g/mol
ODP
0.00012
GWP (100-yr)
1 US EPA value, 40 CFR 84.64(b) IPCC: AR4 not assessed · AR5 not assessed · AR6 not assessed
Atmospheric lifetime
0.06 years
New-equipment status (US)
Not an AIM Act regulated substance; 40 CFR 84.54 GWP limits don't apply.

What is R-1224yd(Z)?

R-1224yd(Z) is a hydrochlorofluoroolefin (HCFO) — the chlorine-containing analog of an HFO. The single chlorine atom gives it a small but measurable ozone-depletion potential (ODP 0.00012, several orders of magnitude lower than R-123's 0.02 or R-22's 0.055). R-1224yd(Z) is not a controlled substance under the Montreal Protocol.

Commercially developed by AGC Chemicals as AMOLEA 1224yd, R-1224yd(Z) is targeted specifically at low-pressure centrifugal chiller applications where R-123 has been the historical refrigerant. Since 2015, HCFC-123 may be produced or imported only as a refrigerant for equipment made before January 1, 2020; no production or import from January 1, 2030 (EPA — phaseout of class II ozone-depleting substances). That servicing-only status created the replacement need for existing R-123 chillers. R-1224yd(Z) is one of three commercial replacements (with R-1233zd(E) and R-514A) competing for that market.

Where R-1224yd(Z) is used

Low-pressure centrifugal chillers (commercial cooling, district cooling, large institutional buildings)
R-123 replacement in existing low-pressure centrifugal chillers
Some new low-pressure chiller installations
Limited deployment outside the centrifugal chiller niche

Regulatory & phase-down status

R-1224yd(Z) is not on any active phase-down list. It is not a controlled substance under the Montreal Protocol. Its GWP of 1 is below every climate phase-down threshold.

The competitive landscape in the centrifugal chiller R-123 replacement space: R-1233zd(E) (Honeywell Solstice zd, A1, GWP 4), R-514A (Chemours Opteon XP30, B1 toxicity class, GWP 3), and R-1224yd(Z) (AGC AMOLEA, A1, GWP 1). R-1224yd(Z) competes on slightly different properties (lower pressure, modestly different efficiency).

Service notes

POE and PVE oils are compatible. Mineral oil is not used. A1 safety classification simplifies service — no special A2L procedures required. R-1224yd(Z) is a low-pressure refrigerant; system saturation pressures on the evaporator side can be sub-atmospheric at typical chiller operating temperatures, which is normal for this refrigerant class but requires attention to leak-tightness (atmospheric air ingress is the failure mode rather than refrigerant escape).

EPA Section 608 covers R-1224yd(Z) handling. Recovery is required.

Operating cycle

Phase-down timeline

R-1224yd(Z) is not an AIM Act regulated substance (not one of the 18 HFCs in 42 U.S.C. 7675(c), and not a blend containing one). The 40 CFR 84.54 GWP limits don't apply.

Global warming potential, in context

Low-pressure centrifugal chillers

Retrofit and replacement paths

R-1224yd(Z) replaces

R-123 B1 · GWP 77

R-1224yd(Z) vs R-123: saturation pressure

Saturation pressure (PSIG, gauge) for R-1224yd(Z) vs R-123. Each column shows the percent difference from R-1224yd(Z). Sources: R-1224yd(Z): CoolProp 8.0.0 dataset; R-123: CoolProp 7.2.0 dataset.
Temp	R-1224yd(Z)	R-123
0°F	22.9 in. Hg vac.	25.9 in. Hg vac.
40°F	10.3 in. Hg vac.	18.2 in. Hg vac.
70°F	3.9	6.6 in. Hg vac.
100°F	18.2	6.1(−67%)

Frequently asked

›What's the difference between R-1224yd(Z) and R-1233zd(E) as R-123 replacements?

Both are A1 (non-flammable) low-pressure refrigerants with very low GWP (R-1224yd(Z) 1, R-1233zd(E) 4) and effectively-zero ODP, both targeting R-123 replacement in centrifugal chillers. Differences: (1) R-1224yd(Z) has slightly lower vapor pressure than R-1233zd(E) — chillers may need slight compressor adjustment for the lower-pressure operating envelope; (2) chemistry — R-1224yd(Z) has one chlorine atom, R-1233zd(E) has one chlorine and slightly different fluorination pattern; Both work; choice often depends on chiller OEM preference and regional supplier availability.

›Is the small ODP of R-1224yd(Z) a regulatory problem?

No. R-1224yd(Z) is not a controlled substance under the Montreal Protocol, and its ODP of 0.00012 is several orders of magnitude below the ozone-depleting substances the Protocol regulates. R-1224yd(Z) is SNAP-listed acceptable for the centrifugal chiller substitute use.

›Can I retrofit an R-123 chiller to R-1224yd(Z)?

Yes, with manufacturer guidance — R-1224yd(Z) is designed as a retrofit for R-123 chillers.

›What is the GWP of R-1224yd(Z)?

1. This is effectively zero direct global warming impact — R-1224yd(Z) decomposes in the atmosphere within days via OH radical attack, with minimal warming contribution. Compare to R-123 (GWP 77, also very low) and R-134a (GWP 1,430, much higher).

›Why use R-1224yd(Z) instead of just continuing with R-123?

Since 2015, HCFC-123 may be produced or imported only as a refrigerant for equipment made before January 1, 2020; no production or import from January 1, 2030. The remaining R-123 chiller fleet is supplied by reclaimed R-123 from equipment removals, which is a finite and shrinking pool. Chiller owners face a limited window of practical service availability before retrofit or replacement becomes the only option. R-1224yd(Z), R-1233zd(E), and R-514A provide that retrofit / replacement path.

Download this dataset

Full PT chart for R-1224yd(Z) · CC BY 4.0 · attribute the source

CSV JSON

Sources & citations

[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]
CoolProp 8.0.0. 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