Refrigerant management and legal/F-gas compliance
The regulatory framework
In the UK the F-Gas Regulations 2015 (derived from EU 517/2014) control placing on the market, use, leak checking, recovery and record keeping. Companies must be certified and personnel must hold a recognised qualification to handle fluorinated refrigerants. The EU phase-down and bans (and UK equivalents) restrict high-GWP refrigerants and certain new equipment, so design decisions have a compliance dimension, not just a technical one.
Leak checks, records and CO2e
Leak-check frequency is driven by the charge expressed in tonnes of CO2 equivalent: kg of charge × GWP ÷ 1000. Thresholds are typically 5, 50 and 500 tCO2e giving checks at 12, 6 and 3 months respectively; a fixed leak-detection system can extend the interval. All checks, repairs, recoveries and cylinder movements are recorded and kept (typically five years) and made available to the operator.
Worked example
A system holds 12 kg of R404A (GWP 3922, AR4 basis). 12 × 3922 ÷ 1000 = 47.1 tCO2e. That is above 5 but below 50 tCO2e, so leak checks are required every 12 months, with records retained.
Recovery, reuse and waste
Recover, recycle or reclaim - never vent. Label cylinders correctly, never mix refrigerants, and consign waste refrigerant and contaminated oil through licensed waste routes. Reclaimed refrigerant must meet the appropriate specification before reuse; flammable refrigerants need specific recovery equipment and cylinders.
Traps
Using AR5 GWP values when the regulation cites AR4; forgetting that the charge in kilograms must be converted; assuming a small charge is exempt from record keeping; treating recovered gas as ordinary waste.