Refrigerant Knowledge Center

R22 legacy refrigerant service and transition guide

An R22 nameplate starts a legacy-asset decision, not a shopping shortcut. Owners and technicians should identify the equipment, jurisdiction, remaining charge, leak history, and expected service life before choosing recovered or reclaimed service, an engineered conversion, or full replacement. The right route protects the compressor, preserves lawful refrigerant handling, and avoids paying for a conversion that cannot meet the building’s longer-term needs.

Choose the service, conversion, or replacement lane

Start with condition and duty rather than the name of a candidate refrigerant. A tight system with a minor repair need may justify qualified legacy service; recurring leaks or unavailable components strengthen the conversion case; an inefficient or poorly matched asset often belongs in a replacement study. Record the reason for the chosen lane so the next technician does not reopen the decision from guesswork.

R22 asset decision screen
Lane Evidence to collect Stop condition
Continue service Leak location, lawful supply route, compressor condition Repeated loss or unsafe component condition
Engineered conversion OEM or compressor approval, oil, capacity and control review No documented operating envelope
Replace system Load, efficiency, electrical and lifecycle comparison New design cannot satisfy site constraints

Keep ozone and climate values in view

R22 is single-component chlorodifluoromethane, safety class A1, with a normal boiling point near -40.8 °C. The catalog uses GWP 1,810 on the IPCC AR4 100-year basis and ODP 0.055. Those two values measure different environmental effects: zero flame propagation in an A1 test does not remove pressure, frostbite, oxygen-displacement, or hot-surface decomposition hazards.

Keep the GWP assessment basis and ODP visible; neither number decides whether a particular existing system may be serviced.

Treat the cylinder and asset as traceable records

Before connecting service equipment, verify the nameplate, refrigerant identity, cylinder label and provenance, recovery destination, and technician requirements. In the United States, production and import of newly manufactured R22 ended in 2020 for controlled uses, while recovered, recycled, or reclaimed material may follow specific service routes. That supply distinction is different from permission to vent or ignore leak obligations.

  • Photograph the equipment nameplate and record the present charge history.
  • Confirm cylinder identity and lawful recovered or reclaimed provenance.
  • Plan recovery, storage, reclamation, or disposal before opening the circuit.
  • Check the technician and recordkeeping rules for the named jurisdiction.

Require a conversion dossier before changing refrigerant

An R22 conversion changes more than the cylinder. The dossier should name the target duty, compressor approval and envelope, lubricant chemistry and residual-oil plan, elastomers, metering device, line sizing, capacity, discharge temperature, controls, labels, recovery method, and commissioning targets. R407C or another candidate can be evaluated only within that equipment-specific package; a refrigerant comparison alone is not approval.

  • Capture stable R22 baseline pressures, temperatures, load, and energy use.
  • Obtain written compressor and equipment guidance for the exact candidate.
  • Define oil, seal, drier, metering, control, and labeling changes.
  • Set acceptance limits and a rollback or replacement decision before work begins.

Recover first and control exposure

Use recovery equipment, cylinders, hoses, and instruments rated for the service pressure and refrigerant. Ventilate the work area, prevent liquid contact, isolate heat sources that could decompose refrigerant, and follow the current product SDS. A1 classification is useful for equipment design, but it is not permission for untrained work, intentional release, or mixing an unknown legacy charge into a clean recovery stream.

Unknown or mixed legacy charge should be isolated and identified rather than returned to a reusable refrigerant stream.

Name the country, end use, and action

US Section 608 requirements govern relevant stationary recovery, reclamation, technician, sales, leak, and record practices; other countries implement Montreal Protocol controls through their own laws. European Union ozone rules add their own supply, use, recovery, certification, labeling, and trade provisions. A production phaseout date does not by itself answer whether a specific repair, recovered cylinder, conversion, or continued operation is permitted.

  • Separate production and import controls from existing-equipment service rules.
  • Check whether the asset is stationary refrigeration, air conditioning, or another category.
  • Verify state, provincial, or local requirements in addition to national rules.

R22 owner questions

These answers are decision boundaries for an existing asset, not a field charging procedure. The equipment maker, qualified contractor, current SDS, and law for the named location remain the controlling references for any repair or conversion.

Can an existing R22 system still be repaired?

It may have a lawful service route, but supply provenance, recovery duties, equipment condition, and local rules must all be checked first.

Does R407C automatically replace R22?

No; glide, lubricant, metering, capacity, controls, seals, and compressor approval require a documented equipment-specific conversion review.

When is replacement more sensible than another repair?

Repeated leakage, poor efficiency, weak component support, or a short regulatory runway can make a lifecycle replacement study the better use of capital.

Sources and review notes

Last reviewed: 2026-07-19. Confirm current product documents, equipment instructions and rules for the named jurisdiction before acting.

Ask about R22

Include the equipment, intended application, destination and question so the inquiry can be routed accurately.