Work out your R407C refrigerant emissions
= 4.87 tonnes CO2e in 2026 (Scope 1)
Each kg × 1,624.0 kg CO2e, the 2026 UK government (DESNZ) factor.
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R407C refrigerant emission factor by year
| Year | Scope 1 (kg CO2e per kg) | Change |
|---|---|---|
| 2026 | 1,624.0 | 0.0% |
| 2025 | 1,624.0 | 0.0% |
| 2024 | 1,624.0 | 0.0% |
| 2023 | 1,624.0 | -8.5% |
| 2022 | 1,774.0 | 0.0% |
| 2021 | 1,774.0 | 0.0% |
| 2020 | 1,774.0 | 0.0% |
| 2019 | 1,774.0 | – |
Total kg CO2e for the seven greenhouse gases, from the official DESNZ files for each year. 2026 factor ID: 3_201_2135_3_1. Where a factor jumps sharply between two years, it is usually because DESNZ changed its method or data source, not because the activity itself changed.
Worked example
Take 3 kg of R407C topped up in an older air conditioning system. 3 kg × 1,624.0 kg CO2e = 4.87 tonnes CO2e, reported as Scope 1.
How to report it
R407C was the common replacement for R22 in older air conditioning and heat pumps. Leaks are Scope 1, and the amount topped up during servicing is the usual measure.
Where the data comes from
You'll usually find it in your engineer's service records, which must show refrigerant added. Keep the source documents: anyone checking your Carbon Reduction Plan or SECR report may ask how each figure was worked out.
Read more about how the factors change each year in our guide to the 2026 conversion factors, or see how we apply them in our methodology.
Related emission factors
- R410A refrigerant: 1,924.0 kg CO2e per kg
- R134a refrigerant: 1,300.0 kg CO2e per kg
- R32 refrigerant: 677.00 kg CO2e per kg
- All UK emission factors