Recovering R32 From Heat Pumps and AC Systems
As R32 becomes the dominant refrigerant in UK heat pumps and split air conditioning systems, the need for proper R32 recovery procedures is growing rapidly. Venting R32 is illegal under UK F-Gas Regulations and its A2L (mildly flammable) classification adds specific safety requirements to the recovery process.
R32 Recovery Equipment
- A2L-compatible recovery machine: Standard HFC recovery machines are generally compatible with R32, but verify your unit is rated for A2L refrigerants
- Recovery cylinder: Dedicated recovery cylinder — never use a supply cylinder for recovery
- A2L-rated manifold hoses: Standard R410A hoses are typically compatible
- Electronic leak detector: Use an A2L-rated detector calibrated for R32
- Scales: For recording recovered weight
Safety Precautions for R32 Recovery
R32 has a lower flammability limit (LFL) of approximately 13.3% by volume. While this is relatively high compared to A3 refrigerants, precautions are still required:
- Ensure adequate ventilation — work outdoors or in well-ventilated spaces
- Eliminate ignition sources including open flames, sparks and running electrical equipment near leak points
- Use intrinsically safe leak detectors during recovery
- Do not use acetylene torches near R32 systems until fully recovered and purged
R32 Recovery Procedure
- Connect A2L-compatible recovery machine to system service ports
- Operate in liquid recovery mode for efficiency
- Continue until system reaches vacuum or specified low pressure
- Record recovered weight and enter in refrigerant logbook
- Seal and label recovery cylinder
After recovery, our R32 9 kg supply cylinders are available for recharge. See our full refrigerant range for all heat pump gases.