Dubai, UAE – “Just top up the gas” has become the default request when a Dubai homeowner’s AC stops blowing cold air. But HVAC engineers say this reflexive response often masks deeper problems, wastes money, and can damage equipment.
AC gas – more accurately, refrigerant – is a sealed-loop system. Under normal operating conditions, it should never need topping up. If refrigerant levels are low, something is leaking, and adding more gas without fixing the leak is the equivalent of pouring water into a bucket with a hole in it.
“We get this call ten times a day during summer,” said Khalid Nasser, senior HVAC engineer at European Technical. “The homeowner says the AC isn’t cold, asks for a gas refill, and expects us to be done in 30 minutes. When we explain that the unit needs a leak test first, some of them just want to skip straight to the refill because it’s cheaper. But six weeks later, the gas has leaked out again and we’re back for the same job.”
The numbers
European Technical’s service data shows that 72 per cent of AC units presented for gas refill in 2025 had identifiable refrigerant leaks. Of those, 41 per cent had leaks in the evaporator coil, 28 per cent in brazed joints at the outdoor condenser, and 19 per cent in the copper line set connecting indoor and outdoor units.
A straightforward gas refill for a standard split unit costs AED 250-400 and takes about 45 minutes. A leak repair with nitrogen pressure testing, brazing, evacuation, and recharge costs AED 600-1,200 depending on the leak location. The difference leads many homeowners toward the cheaper option – repeatedly.
“We’ve seen households spend AED 1,500 on three refills in a single summer when a AED 800 repair would have fixed the problem permanently,” Nasser said. “It’s false economy, and it degrades the compressor every time the system runs low.”
Community-specific patterns
Certain Dubai communities show higher-than-average refill demand, often linked to building age and original installation quality.
In DAMAC Hills, where newer construction and premium specifications reduce leak incidence, AC gas refill requests tend to be straightforward – typically older units in early-phase villas that need a one-time repair and recharge.
The Lakes, an Emaar community delivered in the mid-2000s, generates heavier refill traffic. Original copper line sets in these villas are approaching 20 years of service, and thermal cycling – the daily expansion and contraction of metal as temperatures swing between 25°C at night and 48°C at midday – has weakened many joints to the point of micro-leaks.
“The Lakes and The Springs share the same vintage and the same issues,” Nasser noted. “We recommend nitrogen pressure testing for any unit in these communities that needs a refill. If the pressure holds for 24 hours, fine – recharge and move on. If it drops, we know there’s a leak worth finding.”
Environmental and regulatory pressure
Older AC systems in Dubai commonly use R-22 refrigerant, which is being phased out globally under the Montreal Protocol due to its ozone-depleting properties. The UAE has restricted R-22 imports, and prices have risen from AED 40 per kilogram in 2020 to over AED 120 in 2026.
The price increase has changed the repair-or-replace calculus for older units. Where a R-22 refill was once negligibly cheap, the cost now approaches the point where replacing the unit with a modern R-410A or R-32 system becomes economically rational – particularly for units older than 10 years.
“R-22 pricing is doing what regulation alone couldn’t,” Nasser said. “Homeowners are finally retiring 15 and 20-year-old units because the gas alone costs more than the monthly payment on a new inverter system.”
What homeowners should insist on
HVAC professionals recommend that homeowners request the following whenever an AC gas refill is proposed:
– A nitrogen pressure test before any refrigerant is added
– Documentation of refrigerant type and quantity charged
– A written report on system condition, including compressor amperage and superheat readings
– A follow-up check after two weeks to verify that levels have held
In newer communities like Studio City, where construction-era installation defects are the primary leak source, a single repair-and-recharge visit typically resolves the issue permanently.
“If a technician wants to refill without testing for leaks first, find a different technician,” Nasser said.
European Technical is a Dubai-based home maintenance company providing AC, plumbing, electrical, painting, and general maintenance services across Dubai and Abu Dhabi. Licensed by Dubai Municipality, the company serves residential and commercial clients with same-day emergency response. For more information, visit europeantechnical.ae or call 800 031 10015.
