If you are trying to work out whether your commercial air conditioning system uses R22, you are probably dealing with an older unit, missing paperwork, or a system that is starting to show signs of age. The quickest way to check is to look at the equipment label, manufacturer’s plate, unit data plate, service records, maintenance records or F-Gas records. These should tell you the refrigerant type used in the system.
The problem is that many commercial buildings still have older air conditioning systems that appear to be working normally, even though they rely on an outdated refrigerant. Because R22 has been phased out, this can become a serious issue when the system develops a refrigerant leak, loses refrigerant charge, or needs major repair work.
In this article, we will explain how to identify whether your commercial air conditioning system uses R22, what the R22 phase-out means in practical terms, and when to arrange a system inspection with a qualified engineer. The aim is simple: help you make an informed decision before a small technical issue turns into a business interruption.
The most reliable starting point is the unit itself. Commercial air conditioning equipment should have an equipment label, manufacturer’s plate or unit data plate fixed to the outdoor unit, indoor unit, rooftop unit, packaged unit or plant room equipment. This plate normally shows key information such as the model number, serial number, electrical rating and refrigerant type.
On an R22 system, the label may show wording such as:
The label might also show the refrigerant charge, usually in kilograms. For example, a small split system may only have a modest charge, while larger commercial systems, multi-split systems or older packaged units can hold far more refrigerant. This matters because the larger the system, the greater the potential cost and disruption if a leak or major fault occurs.
A practical tip here is to take a clear photo of the manufacturer’s plate rather than trying to write the details down while leaning around pipework or casing. Many labels are faded, awkwardly positioned or partly covered by dirt. A photo lets your air conditioning contractor zoom in and confirm the refrigerant type without guessing.
If the plate is missing, damaged, painted over or unreadable, do not assume the system is safe because it still runs. Older refrigerants were used across a wide range of commercial air conditioning systems, and some units have been altered, relocated or repaired several times over their lifespan. In that situation, the next place to check is the paperwork.
Your service records, maintenance records and F-Gas records may show what refrigerant was used during previous visits. Look for engineer notes, refrigerant recovery details, pressure test information, leak checks, refrigerant charge amounts, or comments about R22, R407C, R410A or other alternatives.
For commercial premises, this paperwork can often be scattered across facilities folders, landlord packs, old contractor emails or handover files from previous building managers. It is worth checking properly. A five-minute search through the right document can save you from booking an unnecessary emergency callout.
There is a subtle point that many businesses miss. The label tells you what the system was originally designed to use. The service history tells you what may have happened since. If a system has been retrofitted to use an alternative refrigerant, the records should explain this. If they do not, you need a certified air conditioning engineer to verify the system before any repair decision is made.
R22 is an HCFC refrigerant that was widely used in older air conditioning and refrigeration equipment. It worked well from a cooling point of view, which is one reason so many older systems stayed in service for a long time. The problem is environmental. R22 contributes to ozone depletion, which is why it was gradually removed from use.
In the UK and Europe, the R22 phase-out meant new use in servicing was restricted in stages. Virgin R22 could no longer be used for servicing from 2010, and recycled or reclaimed R22 was no longer permitted for servicing from 2015. For a commercial building owner, that means the system can keep running if the refrigerant circuit remains sealed, but once the system needs refrigerant-related repair, the options become much more limited.
This is where the distinction matters. Having R22 inside an old system is not the same as being able to keep repairing that system indefinitely. If the unit develops a refrigerant leak and loses charge, it cannot simply be topped up with R22 as though nothing has changed.
Another point worth understanding is that air conditioning systems do not “use up” refrigerant in normal operation. A low refrigerant charge usually points to a leak or fault. If someone tells you the system “just needs more gas”, that should raise a question. The real issue is why the refrigerant level is low in the first place.
For example, if an office split system has poor cooling and frozen pipework, the visible symptom might look simple. Staff complain that the room is too warm, the unit runs for longer, and the indoor coil begins to ice up. The underlying cause could be a refrigerant leak. With a modern system, that still needs proper investigation. With an R22 system, it can become the moment where the business has to choose between replacement, retrofit, or living with unreliable cooling.
There is also a commercial risk that does not always appear in technical guides. R22 systems tend to be older systems, and age rarely affects only the refrigerant circuit. Fans, controls, sensors, coils, compressors and electrical components may all be closer to the end of their service life. Spending money on one repair may not solve the broader reliability problem.
That does not mean every R22 system should be ripped out immediately. A blanket replacement message is too simplistic. If the system is sealed, lightly used, well-maintained and not business-critical, a planned approach may be sensible. But if it cools a server room, retail space, treatment room, hotel area or busy office, waiting for failure is a much bigger gamble.
An older commercial air conditioning system can keep working long after it has become inefficient or risky. The signs are not always dramatic at first. Often, they appear as small annoyances that people learn to work around.
Poor cooling is the obvious one. If the system takes longer to bring a room to temperature, struggles during warm weather, or cools unevenly across the building, the refrigerant charge may need checking. However, reduced performance can also be caused by dirty filters, blocked coils, failed fans, control faults or poor maintenance. This is why a proper system inspection matters.
Frozen pipework or ice on coils is another warning sign. Ice can form when airflow is restricted or refrigerant levels are low. A common mistake is to turn the system off, wait for the ice to melt, then restart it without finding the cause. That might get the room cool again for a short while, but it does not fix the problem.
Repeated callouts are often more revealing than one major breakdown. If the same system needs attention every summer, or if engineers have previously added refrigerant, noted pressure issues or recommended leak checks, the maintenance records are telling a story. The system is no longer just old. It is becoming unpredictable.
Rising energy bills can also be linked to a legacy air conditioning system. Older equipment often has lower efficiency than modern units, and a system with performance issues may run longer to deliver the same cooling. In a commercial setting, that can add up quickly, especially across multiple rooms or long trading hours.
Unusual noises, short cycling, water leaks, tripping electrics or hot and cold complaints from staff should not be ignored either. They may not all point directly to R22, but they do indicate that the system needs attention from a qualified engineer.
One practical approach is to score each system by importance, not just age. A 20-year-old unit in a rarely used meeting room may be less urgent than a 15-year-old unit cooling an IT area. The refrigerant type matters, but so does the consequence of failure. This is a useful way to prioritise budgets when a building has several older units.
Once you confirm that your commercial air conditioning system uses R22, the next question is what to do with that information. There are usually three possible routes: maintain, retrofit or replace.
If the system is still working and there is no refrigerant leak, planned maintenance may be the right short-term option. Regular servicing can keep filters clean, coils clear, drains flowing and electrical components checked. It can also help identify early signs of deterioration before the system fails during peak demand.
However, maintenance does not remove the underlying R22 issue. It simply helps manage the risk. If the system later loses refrigerant charge, the fact that it has been serviced will not make R22 available again for use.
Retrofitting may be possible in some cases. This means modifying the system so it can operate with an alternative refrigerant. Some older systems have been converted to refrigerants such as R407C, depending on the equipment and application. Even then, it is not a simple swap. Oil compatibility, seals, valves, controls, cooling capacity and manufacturer guidance all need to be considered.
A retrofit can look attractive because it may cost less than full replacement, but it can also leave you with an old system running on a compromise. If the compressor, coils and controls are already ageing, changing the refrigerant does not make the rest of the system new. In some cases, cooling performance can drop, and future repair costs remain a concern.
R22 Replacement is often the stronger long-term option for commercial premises that rely heavily on cooling. A modern system can improve efficiency, reliability and temperature control, while removing the uncertainty linked to outdated refrigerant. It also gives you the chance to reassess whether the existing design still suits the building.
For example, an office may have been rearranged since the original system was installed. Meeting rooms may have become staff areas. Server equipment may have been added. Occupancy may have changed. Replacing an R22 system is not only about installing a newer version of the same thing. It is an opportunity to design cooling around how the space is actually used now.
The least helpful approach is waiting until a breakdown forces the decision. Emergency replacement usually means less time to compare options, plan access, manage staff disruption or budget properly. A planned replacement can often be phased around quieter periods, lease events, refurbishment work or seasonal demand.
If you are unsure whether your system uses R22, book a visual inspection and refrigerant check with a certified air conditioning engineer. You should do this sooner if the unit is old, the equipment label cannot be read, or the system has had previous refrigerant issues.
A professional inspection should do more than identify the refrigerant type. It should give you a clear picture of the system’s condition and risk. That includes checking the manufacturer’s plate, reviewing service records, inspecting visible pipework, assessing performance, looking for signs of a refrigerant leak, and confirming whether the system is suitable for continued maintenance, retrofit or replacement.
Facilities managers should also ask for the findings in writing. A short condition report is useful for budgeting, compliance discussions, landlord communication and internal decision-making. It also gives you a baseline if the system starts to deteriorate later.
For multi-unit commercial sites, it is sensible to create a simple asset list. Record each unit’s location, model, serial number, refrigerant type, approximate age, refrigerant charge and condition. This does not need to be complicated. Even a spreadsheet is better than relying on memory or waiting until a contractor is standing on site during a breakdown.
A good engineer will not push for replacement without evidence. They should explain whether the system is safe to keep running, whether there are signs of leakage, whether parts are becoming difficult to source, and whether replacement would offer a realistic benefit. That balanced advice is especially important with R22, because the right answer depends on condition, usage and business risk.
The most reliable way to know whether your commercial air conditioning system uses R22 is to check the equipment label, manufacturer’s plate, unit data plate, service records, maintenance records and F-Gas records. If those details are missing or unclear, a qualified engineer can confirm the refrigerant type through a proper system inspection.
R22 is an outdated refrigerant, and any legacy air conditioning system that still uses it should be treated as a planning issue. It may continue to operate if it is sealed and well maintained, but a refrigerant leak or loss of refrigerant charge can quickly limit your repair options.
The key is not to panic, but not to ignore it either. Older systems rarely fail at a convenient time. By identifying R22 early, you can decide whether continued maintenance, retrofit or replacement is the most practical route for your building.
If you are unsure what refrigerant your commercial air conditioning system uses, arrange an inspection with a certified air conditioning engineer. A clear assessment now can help you avoid rushed decisions, unexpected downtime and unnecessary repair costs later.