Leak-check calculator
Enter the refrigerant and charge of a unit to see its CO₂ equivalent, the leak-check interval under the EU F-Gas Regulation and whether it falls under the US EPA leak-repair rules (40 CFR Part 84). No sign-up needed.
European Union — F-Gas Regulation (EU) 2024/573
- CO₂ equivalent
- 23.68 t CO₂e
- GWP
- 2,088
Leak-check interval
Leak check every 12 months
Keep leak-check records for 5 years.
United States — EPA Section 608 / AIM Act
- Charge in pounds
- 25 lb
- 40 CFR Part 84 (HFC leak repair)
- ✓
Covered by 40 CFR 84 (leak repair)
Leak rate threshold: 10% per year
Keep service and leak-rate records for at least 3 years.
Simplified aid based on Regulation (EU) 2024/573 (Art. 5) and 40 CFR Parts 82 and 84. It does not cover national rules, every exemption or blends not listed. Always check the current regulations; the equipment operator remains responsible for compliance.
How the EU leak-check interval works
Under Article 5 of Regulation (EU) 2024/573, equipment containing HFCs needs periodic leak checks by certified personnel once the charge reaches 5 tonnes of CO₂ equivalent (charge in kg × GWP ÷ 1,000). For HFOs listed in Annex II, the threshold is a charge in kilograms. A working leak detection system doubles the interval.
| Charge | Interval | With leak detection |
|---|---|---|
| 5 to < 50 t CO₂e (HFC) · 1 to < 10 kg (HFO) | 12 months | 24 months |
| 50 to < 500 t CO₂e (HFC) · 10 to < 100 kg (HFO) | 6 months | 12 months |
| ≥ 500 t CO₂e (HFC) · ≥ 100 kg (HFO) | 3 months | 6 months (leak detection mandatory) |
How the US Part 84 leak-repair rule works
Since January 1, 2026, appliances with a full charge of 15 lb or more of an HFC refrigerant (or a substitute with a GWP above 53) are covered by 40 CFR Part 84, Subpart C — except residential and light-commercial air conditioning. Each time refrigerant is added, the leak rate is calculated: (lb added ÷ full charge) × (365 ÷ days since the last addition) × 100. If it exceeds the threshold — 10% for comfort cooling, 20% for commercial refrigeration, 30% for industrial process refrigeration — the leaks must be repaired within 30 days and verified.
Track every unit automatically
Airmaintix keeps a refrigerant log per unit, calculates intervals and leak rates on every service and reminds you before a leak check is due.
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