Refrigeration emissions include direct releases of refrigerants and indirect emissions from the electricity used for cooling. The available evidence spans global cooling forecasts, HFC models, commercial equipment, food systems, and policy scenarios, so the figures below keep those boundaries explicit.
Key Refrigeration Emissions Statistics
The most useful headline figures are:
- In the 2050 current-policy projection, global cooling emissions reach 6.1 billion tonnes CO2e worldwide.
- In the 2050 UNEP current-policy projection, cooling emissions exceed 10% of global emissions.
- In the 2050 sustainable-cooling scenario, cooling emissions fall by more than 60% versus business as usual globally.
- In the 2050 UNEP intervention scenario, about 3.8 billion tonnes CO2e of cooling emissions are avoided worldwide.
- The Kigali Amendment HFC phase-down is estimated to avoid as much as 0.4°C of global warming by 2100.
- From roughly 2020 to 2060, IEA estimates that cooling efficiency and refrigerant improvements could avoid 210–460 GtCO2e globally.
- Global HFC emissions were estimated at 1.1 PgCO2e in 2015.
- In 2010, refrigeration sectors together represented 31% of global HFC emissions.
- In the pre-Kigali baseline, refrigeration and air-conditioning service demand rises 12-fold between 2005 and 2050 globally.
- In 2020, commercial refrigeration represented an estimated 26% of global HFC emissions.
- In 2020, commercial refrigeration produced an estimated 286 MMTCO2e of direct HFC emissions worldwide.
- A multiplex rack system typically contains 20–3,000 kg of refrigerant charge.
- Multiplex rack systems have a typical annual operational leak rate of 10–35% of charge.
- EPA lists R-404A at a 100-year GWP of 3,920 relative to CO2.
- Worldwide cold-chain activities account for around 5% of global food-system emissions.
- Under a 2050 stringent-Kigali scenario, annual HFC emissions are 92% below the pre-Kigali baseline globally.
- Under stringent Kigali compliance for 2018–2100, cumulative HFC emissions are modeled at 48 PgCO2e.
- In 2050, Kigali compliance plus electricity savings is modeled to reduce total annual GHG emissions by 4.8–7.3 PgCO2e versus the pre-Kigali baseline.
Contents
- Global refrigeration emissions scale
- HFC and refrigeration emissions trends
- Commercial refrigeration emissions by equipment
- Refrigerant leakage and global warming potential
- Cold-chain emissions in food systems
- Refrigeration emissions reduction scenarios
Global Refrigeration Emissions Statistics and Cooling Scale
UNEP’s About Cooling assessment models a 2022 baseline and projections through 2050 across 192 UN Member States. Its cooling boundary includes both direct refrigerant emissions and indirect energy emissions, making it broader than refrigeration equipment alone.
Under current policies, the assessment projects 6.1 billion tonnes CO2e of cooling emissions in 2050, equivalent to more than 10% of global emissions in that projection. The comparison is a UNEP scenario result, not an observed 2050 total. UNEP, About Cooling
The same source models a sustainable-cooling pathway that cuts 2050 cooling emissions by more than 60% against business as usual. That modeled intervention corresponds to about 3.8 billion tonnes CO2e of avoided cooling emissions in 2050; it is not a measured reduction already achieved. UNEP, About Cooling
The climate relevance extends beyond one year’s emissions inventory. UNEP estimates that the Kigali Amendment’s HFC phase-down could avoid as much as 0.4°C of global warming by 2100, a global climate estimate associated with HFC policy rather than a refrigeration-only measurement. UNEP, About Cooling
The IEA estimates that combined improvements in cooling efficiency and refrigerants could avoid 210–460 GtCO2e over roughly 2020–2060. IEA compares that range with roughly four to eight years of 2018 global annual emissions; the comparison covers cooling broadly and is not a direct refrigeration measure. IEA, Cooling Emissions and Policy Synthesis Report
HFC and Refrigeration Emissions Trends
A pre-Kigali model gives a long historical and scenario view of HFC emissions. These values include all HFC uses, so they should not be read as refrigeration-only totals.
| Period or scenario | Global HFC emissions | Scope |
|---|---|---|
| 2005 | 0.46 PgCO2e | Estimated global HFCs |
| 2010 | 0.73 PgCO2e | Estimated global HFCs |
| 2015 | 1.1 PgCO2e | Estimated global HFCs |
| 2050 pre-Kigali baseline | 4.3 PgCO2e | Forecast global HFCs |
| 2100 pre-Kigali baseline | 6.2 PgCO2e | Long-range forecast global HFCs |
The model estimates that commercial, industrial, transport, and domestic refrigeration together represented 31% of global HFC emissions in 2010. For context, stationary air conditioning represented 22%, mobile-air-conditioner HFC-134a represented 15%, and HFC-23 from HCFC-22 production represented 18% in the same model year. Ploy et al., Electricity savings and greenhouse gas emission reductions from global phase-down of hydrofluorocarbons
Demand growth is another driver. In the pre-Kigali baseline, modeled demand for refrigeration and air-conditioning services rises 12-fold between 2005 and 2050, while baseline HFC emissions reach 4.3 PgCO2e in 2050 and 6.2 PgCO2e in 2100.
These are model forecasts, not current-policy observations. Ploy et al., Electricity savings and greenhouse gas emission reductions from global phase-down of hydrofluorocarbons
Commercial Refrigeration Emissions by Equipment Type
EPA estimated that commercial refrigeration accounted for 26% of global HFC emissions in 2020, using an estimate based on 2013 source data. The same fact sheet estimated global HFC emissions at 1,084 MMTCO2e and commercial refrigeration’s direct HFC emissions at 286 MMTCO2e in 2020. EPA, Transitioning to Low-GWP Alternatives in Commercial Refrigeration
Equipment size and refrigerant charge vary substantially by system type:
| Equipment type | Typical cooling capacity | Typical refrigerant charge |
|---|---|---|
| Stand-alone systems | 0.1–1 kW | 0.1–2 kg |
| Remote condensing systems | 0.1–20 kW | 1–20 kg |
| Multiplex rack systems | 40 to more than 200 kW | 20–3,000 kg |
These are typical technical ranges compiled by EPA, not fleet averages. Their scale helps explain why equipment population, charge size, maintenance, and leakage behavior all matter when assessing emissions. EPA, Transitioning to Low-GWP Alternatives in Commercial Refrigeration
EPA’s typical annual operational leak-rate ranges also differ by equipment:
- Stand-alone systems: below 1% of charge per year.
- Remote condensing systems: 5–20% of charge per year.
- Multiplex rack systems: 10–35% of charge per year.
The leak rates are typical estimates rather than universal measured averages. A larger charge and a higher operational leak rate can increase direct refrigerant emissions, but the figures do not by themselves quantify total lifecycle emissions or electricity use. EPA, Transitioning to Low-GWP Alternatives in Commercial Refrigeration
Refrigerant Leakage Rates and Global Warming Potential
Direct emissions depend on the refrigerant released, not only on the quantity of charge. EPA lists the following 100-year global warming potentials relative to CO2:
| Refrigerant | 100-year GWP relative to CO2 |
|---|---|
| HFC-134a | 1,430 |
| R-404A | 3,920 |
| R-507A | 3,985 |
These values are refrigerant comparisons from the EPA fact sheet. They do not represent annual leakage rates, total equipment emissions, or a global fleet average. EPA, Transitioning to Low-GWP Alternatives in Commercial Refrigeration
Policy definitions also matter. EPA listed up to 33 refrigerants and blends as unacceptable for specified newly manufactured or retrofitted commercial systems in the 2016 SNAP rulemakings; the action applied to specified end uses and dates and was not a global ban. EPA, Transitioning to Low-GWP Alternatives in Commercial Refrigeration
In the United States, the AIM Act targets an 85% reduction in HFC production and consumption from baseline levels by 2036. EPA’s 2025 HFC Data Hub covers 18 HFCs regulated under the AIM Act, and its detailed table includes only HFCs produced or consumed in the 2025 reporting year; the target is statutory and prospective, not an observed emissions reduction. EPA, HFC Data Hub
Cold-Chain Refrigeration Emissions in Food Systems
Food-system figures provide context for cold-chain refrigeration, but they are broader than refrigeration or refrigerant leakage. FAO estimated total global food-system emissions at 18 billion tonnes CO2e in 2015, equal to 34% of total anthropogenic emissions that year, compared with 44% in 1990. FAO, Food systems account for more than one third of global greenhouse gas emissions
Within the FAO summary, distribution accounted for 29% of global food-system emissions in the 2015 context. Distribution includes more than refrigerated distribution, so it cannot be substituted for cold-chain emissions.
Worldwide cold-chain activities account for around 5% of global food-system emissions, an approximate share that includes more than refrigerant leakage. Methane, by comparison, accounts for around 35% of global food-system emissions, which is a food-system comparator rather than a refrigeration statistic. FAO, Food systems account for more than one third of global greenhouse gas emissions
Global per-capita annual food-related emissions declined by around one-third from 1990 to 2015, reaching about 2 tCO2e per person per year. This is a global food-system average, not a consumer footprint and not a cold-chain-specific measure. FAO, Food systems account for more than one third of global greenhouse gas emissions
Refrigeration Emissions Reduction Scenarios and Policy Outcomes
The peer-reviewed HFC model compares pre-Kigali baselines with Kigali-compliance and technical-potential scenarios. Under the modeled Kigali scenario, annual HFC emissions are 92% below the pre-Kigali baseline in 2050 and 95% below it in 2100.
| Scenario | Cumulative HFC emissions, 2018–2100 | Model result |
|---|---|---|
| Pre-Kigali SSP3 baseline | 363 PgCO2e | Baseline forecast |
| Pre-Kigali Cooling-for-All baseline | 378 PgCO2e | Alternative baseline forecast |
| SSP1 sensitivity case | 355 PgCO2e | Sensitivity forecast |
| Stringent Kigali compliance | 48 PgCO2e | 87% below baseline |
| Maximum technically feasible reduction | 13 PgCO2e | Nearly 97% below baseline |
The baseline values are alternative scenarios, while the compliance and technical-potential values are modeled outcomes. Stringent Kigali compliance is estimated to reduce cumulative HFC emissions by 87% below baseline, and maximum technical reduction by nearly 97%; neither is an observed global result. Ploy et al., Electricity savings and greenhouse gas emission reductions from global phase-down of hydrofluorocarbons
The model also combines HFC reductions with electricity savings. Kigali compliance plus electricity savings lowers total annual GHG emissions by 4.8–7.3 PgCO2e in 2050 versus the pre-Kigali baseline, and by 7.3–12.1 PgCO2e in 2100; the ranges span energy-development pathways and combine HFC and electricity effects. Ploy et al., Electricity savings and greenhouse gas emission reductions from global phase-down of hydrofluorocarbons