Refrigerant GWPs, IPCC AR5, 100-year.
The global warming potentials our carbon reports apply to refrigerant losses. A kilogram of gas released counts as its GWP in kilograms of CO2 equivalent.
| Gas | GWP | Typical use |
|---|---|---|
| R-410A | 1,924 | HVAC residential/commercial (R-32 + R-125 blend) |
| R-134a | 1,300 | Mobile AC, commercial refrigeration |
| R-404A | 3,943 | Commercial refrigeration, being phased out |
| R-507A | 3,985 | Low-temp commercial refrigeration |
| R-22 | 1,760 | Legacy HCFC, no longer allowed in new equipment in the EU, UK or US |
| R-32 | 677 | Lower-GWP residential AC, growing adoption |
| R-454B | 467 | R-410A replacement in new residential AC (US from 2025) |
| R-1234yf | 1 | Mobile AC, EU/US automotive standard |
| R-1234ze | 1 | Ultra-low-GWP commercial refrigeration |
| HFC-125 | 3,170 | Component of many blends |
| HFC-152a | 138 | Lower-GWP industrial refrigeration |
| R-290 (propane) | 3 | Natural refrigerant, small commercial |
| R-717 (ammonia) | 0 | Natural refrigerant, industrial |
| R-744 (CO2) | 1 | Natural refrigerant, supermarket refrigeration |
Where the values come from
The values are the IPCC Fifth Assessment Report (AR5, 2013) 100-year global warming potentials, from Working Group I, Chapter 8, Table 8.A.1, as the US EPA GHG Emission Factors Hub 2025 tabulates them for single gases (Table 11) and blends (Table 12). R-22 (HCFC-22) is taken from Table 8.A.1 directly. R-454B is derived from its composition, 68.9% R-32 and 31.1% R-1234yf.
AR5 lists R-1234yf and R-1234ze(E) as below 1, and the reports enter them as 1. Propane and ammonia have no AR5 value; the reports use 3 and 0, the values in common use.
Frequently asked questions
What is the GWP of R-410A?
1924 on the IPCC Fifth Assessment Report (AR5) 100-year basis, as the EPA GHG Emission Factors Hub tabulates it for the blend of R-32 and R-125. One kilogram of R-410A leaked counts as 1924 kg CO2e.
What is the GWP of R-32?
677 on the IPCC AR5 100-year basis.
How are refrigerant emissions calculated?
The kilograms of refrigerant released through leaks, servicing or disposal are multiplied by the gas's GWP. The result is Scope 1 (fugitive emissions) for equipment the company owns or controls.
Factor pack v2.6.17. Grid and fuel factors by country