Can an old R22 aircon still be serviced?

R22 aircon: what is changing

R22 is a refrigerant gas used in some older aircons. It is one of the hydrochlorofluorocarbons (HCFCs): the National Environment Agency (NEA) lists R-22 among the common HCFCs.

NEA's circular on the HCFC phase-out management plan says HCFCs are commonly used as refrigerants in the refrigeration and air-conditioning sectors. So a rule about HCFCs also affects aircons that run on R22.

The rule itself is set out in NEA's circular on the HCFC phase-out schedule. Under the Montreal Protocol, Singapore must completely phase out its consumption of HCFCs by 2030, and NEA administers this.

As the next sections explain, R22 can still be used for now. The practical question is how long it makes sense to keep an old unit running on a gas that is being phased out.

Why supply is falling

NEA manages HCFC consumption through quota allocations. Its phase-out schedule circular says NEA will make gradual reductions in HCFC consumption quota allocations every year, starting from 2026, and that the supply of HCFCs is set to decline further.

That is not a ban on using what you already have. The same circular says use of HCFCs by local industries and end-users is still allowed until 2030, subject to the stepwise phase-out schedule. So there are two things to keep in mind: a supply that NEA says is set to decline, and an end point of 2030.

If your old aircon refrigerant is R22, treat this as something to plan around rather than an emergency.

Servicing and top-ups for now

When the HCFC cap began, NEA's phase-out management plan circular said HCFCs would remain available for servicing and maintenance of existing equipment after 2013. That statement was about the start of the cap, not a promise for any later year. The phase-out by 2030 still applies.

These steps are practical tips, not NEA rules, but they help you go in prepared.

First, confirm the gas. Check the label on the outdoor unit or the manual for the refrigerant type, and tell the technician the unit uses R22 when you book. If the outdoor unit is hard to reach, ask the technician to check it for you.

Second, ask why the unit needs gas. If a technician suggests an R22 gas top up, ask what caused the low gas and whether they have checked for a leak. A top-up does not fix a leak, so a unit that keeps losing gas may need a repair, or a decision about replacement, rather than another refill.

For what the service involves, see aircon gas top-up. The cost depends on the job, so read the aircon gas top-up cost guide and ask each company what its quote includes.

Planning a replacement

Planning ahead lets you compare options calmly rather than after a breakdown. For the wider trade-offs, read repair or replace an old aircon.

Rules also cover the refrigerant in new units. NEA's page on reducing greenhouse gas emissions from refrigerants says that since 2022, split-type household aircons (inverter and non-inverter, up to 17.6 kW) supplied in Singapore must use a refrigerant with a global warming potential (GWP) of no more than 750. Goods supplied before then are not affected.

When you compare models, use NEA's Energy Label. It rates efficiency in ticks, from 1 tick (Low) to 5 ticks (Excellent). The label's annual energy cost uses fixed assumptions NEA states on the label, not your tariff. See 5-tick or 3-tick aircon for how the ratings compare.

Size matters too. NEA's tips on buying energy-efficient appliances say to choose the right cooling capacity: oversized units cost more to run and may not dehumidify well because they cool too quickly, while undersized units do not cool or dehumidify adequately. NEA also suggests looking at life cycle cost, not just purchase price, and says to consult your aircon supplier for a detailed assessment.

Finally, decide between an inverter or non-inverter aircon for the rooms you cool most.

When to stop and call a professional

Stop relying on top-ups and get the unit checked if you notice any of these:

• The unit needs gas again soon after a top-up.
• You see ice on the unit, hear hissing, or the cooling is poor.
• A repair quote comes close to the cost of a new unit.
• The brackets holding the outdoor unit are rusty or corroded.

Before you replace a unit, check whether any aircon vouchers apply. To compare the cost of keeping an old unit running, look at aircon servicing prices, or browse aircon companies in the directory.

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