An AC installation in Dubai that was done badly still blows cold air in week one. The problems arrive in month eight, and by then the installer has your money and a disconnected phone. We size the unit for the room, test the system before charging it and handle the building NOC.
Nobody wants to be told to replace something. These are the cases where another repair is just a deposit on the same conversation next summer.
Compressors, fan motors and control boards are the expensive three. Once a unit that age needs one of them, the repair is a meaningful fraction of a new system, and the rest of the unit is the same age as the part that just failed.
R22 is being phased out worldwide. It is getting scarcer and dearer every year, so a leak on an R22 system is a problem that compounds. If your unit is old enough to run it, replacement is usually the cheaper path once you look past this month.
A sealed system does not consume refrigerant. Repeated top-ups mean a leak, and on older units the leak is often in the coil itself rather than a joint. A coil replacement on a ten-year-old unit rarely makes sense.
Compressors lose efficiency as they wear. The unit still cools, it just takes longer and works harder to do it. That shows up on DEWA long before it shows up as a breakdown.
An oversized unit cools the air fast, switches off, and never runs long enough to pull the humidity out. The room feels cold and clammy at once. No repair fixes this, because nothing is broken.
Once mould has established inside the coil fins and the drain pan, cleaning buys you a few weeks. On an older unit that has been left wet through several summers, the honest answer is replacement.
Worth comparing against any other quote you have. AC installation means very different things depending on who is quoting it.
Nothing in the second column appears on your invoice unless you approved it first.
Most Dubai apartments get a wall-mounted split. The others come up more often than people expect, and picking wrong is expensive to undo.
One indoor unit, one outdoor. The default for apartments and single rooms, easiest to service and cheapest to replace when the time comes.
Several indoor units running from one outdoor unit. Useful where balcony or roof space only allows one condenser, which is common in newer towers. Harder to diagnose when something fails, because the units share a circuit.
Concealed unit in the ceiling void feeding several rooms through ductwork. Standard in villas and larger apartments. Quiet and invisible, but the duct runs collect dust and need servicing more often than a split.
Ceiling-mounted, blowing in four directions. Mostly offices, shops and clinics where a wall unit would look wrong or cannot cover the floor area.
A split unit that would last fifteen years in a temperate climate often starts giving trouble here at year six.
The fastest way to quote an AC is to look at the room and name a capacity. It is also how most units end up oversized, because a bigger number sounds safer. An oversized unit short-cycles: it hits temperature quickly, shuts off, and never runs long enough to dehumidify. In Dubai humidity that means a cold room that still feels damp, and a compressor doing far more starts than it was designed for.
This is the one that separates a proper installation from a fast one. Before refrigerant goes in, the lines must be vacuumed down to pull out air and water vapour. Skipping it takes twenty minutes off the job and leaves moisture inside, which forms acid, which eats the compressor from the inside. The unit works perfectly for months, then fails in a way nobody connects to installation day.
Condensate moves by gravity. A drain line run flat or, worse, uphill over a joist will back up into the indoor unit and out through your ceiling. Dubai humidity means these units produce a serious volume of water, so a drain that would cope in a milder climate fails here.
Outdoor units reject heat. Boxed into an enclosed balcony, pushed against a wall, or sat under a low canopy, they re-ingest their own hot air and the whole system loses efficiency. The unit is not faulty. It is suffocating.
Within roughly ten kilometres of the coast, in Marina, JLT, Jumeirah, Palm and the rest, salt attacks the aluminium fins of the condenser. Standard coils corrode years earlier than inland. Coated coils cost more upfront and are the correct specification here.
The suction line runs cold and must be fully insulated along its whole length, including behind the wall. Thin or gapped insulation sweats, and that water runs down inside the wall where nobody sees it until the paint bubbles.
You will know the price before anyone picks up a tool.
We measure the room, check the electrical supply, look at where the condenser can actually go, and work out the drain route. This is where the sizing is decided, and it cannot be done over the phone.
Unit, capacity, scope of work and anything that falls outside it, all in writing before you commit. If a building NOC is needed we raise it at this point.
Floors and furniture covered before the toolbox opens. Brackets, line set, drain and electrical run. Nitrogen pressure test, then vacuum, then charge.
We measure the temperature difference across the coil, run water through the drain to prove it clears, and check the unit through a full cycle with you there. Warranty starts that day.
Installation quotes in Dubai vary far more than the units themselves do, because most of the difference is in work you cannot see afterwards. These are the questions worth asking.
A proper answer references the room dimensions, the glazing, which direction it faces and how many people use it. An answer that is only a number is a guess.
Oversizing is the single most common installation fault in Dubai, and it cannot be corrected afterwards.
The answer should be an immediate yes, along with how long they hold the vacuum. If the question causes hesitation, that tells you what you need to know.
Nitrogen pressure test first to prove the joints, then vacuum, then charge to the manufacturer's stated weight.
Ask them to point at the spot. If it is going into an enclosed balcony or hard against a wall, ask what clearance the manufacturer specifies.
We show you the condenser position at the survey and check the clearance against the manufacturer's figures.
The unit carries a manufacturer warranty. The installation carries the contractor's own. They are different things and both should be in writing.
Written on your quotation before you approve it, with the manufacturer term on the unit passed to you in full.
There should be a route and a fall. If the answer is vague, that is where your ceiling stain comes from in eighteen months.
Book replacement work between November and March if you can. Everything is available, nobody is rushing, and you are not waiting behind a queue of emergency callouts.
General guidance for Dubai property owners and tenants, not technical or legal advice.
The manufacturer's annual interval is written for a different climate. This is what we recommend for Dubai properties.
A sealed refrigerant system does not consume gas. Repeated top-ups are paying for the same unfixed fault over and over.
We supply and install
DAIKIN O GENERAL GREEMost of what we get called out for in July was visible in March. A drain running slow, a coil filling with dust, a breaker running warm. None of it stops you using the flat, so none of it gets fixed, and then all of it fails in the same week. An annual maintenance contract covers scheduled servicing across every trade you actually have, plus minor callouts as they come up. Visits are planned around your building's access rules rather than booked in a panic. A new unit under an annual contract keeps its manufacturer warranty intact, because servicing is documented.
No travel charge inside any of these areas.
A straightforward wall-mounted split replacement is usually a single visit of a few hours. New pipework through walls, ducted systems or multi-split runs take longer, and we will tell you which yours is at the survey rather than on the day.
It depends on the unit, its capacity, the pipe run and any drilling or electrical work. Send a photo of the room and the wall where the unit would go on WhatsApp, and we reply with a price or book a free survey.
In most Dubai towers, yes, for drilling, core cutting or anything on the facade. We raise it with building management rather than leaving it with you, and we schedule around their approved working hours and service lift slots.
It depends on the room area, ceiling height, glazing, which way it faces and how many people use it. West-facing rooms with large windows need more capacity than the floor area alone suggests. We size it at the survey rather than guessing from a photo.
Yes, along with multi-split systems where outdoor space only allows one condenser. Ducted and cassette work needs ceiling access, so the survey matters more.
Between November and March. Units are available, installers are not three days behind, and you are choosing rather than accepting whatever can be fitted tomorrow. Replacing in July means paying for urgency.
Most of Dubai, including Deira, Bur Dubai, Al Nahda, Al Qusais, Al Barsha, Dubai Marina, JLT, Business Bay, Mirdif and Silicon Oasis, with no travel charge inside any of them.
A photo of the room and the wall where the unit would go tells us most of what we need. Add the room's rough size and which way the windows face and we can usually shortlist a capacity before the survey.
A new unit usually means a little electrical work and a patch of gypsum to make good afterwards. Booked together they run in one visit.
