The unit above the ceiling
Concealed central AC in Al Durrah
Al Durrah in north Jeddah features modern apartment blocks with concealed central AC systems hidden behind false ceilings. When cooling weakens or moisture marks appear on walls, our team accesses the unit through the panel, cleans the coil and drain, and preserves the décor.
- Stain-free ceiling
- Clean drain
- Balanced airflow
Clients We're Proud to Serve
Organisations and companies that trusted Alrabih with their projects.
When does a concealed unit need attention?
- 1
A damp stain on the plasterboard
Yellowing or a swollen plasterboard panel below the unit means the drain pan is overflowing. The cause is usually a blocked drain line or a dry trap that has lost its air seal, and leaving it widens the stain and damages the board.
- 2
Weak air from certain grilles
When grilles in one room weaken while others stay cool, the evaporator or blower inside the concealed unit needs cleaning. Jeddah's heavy dust settles on the fins and blower wheel and gradually cuts the airflow.
- 3
Humming or vibration from above
A recurring sound from the ceiling void may come from the blower wheel if it is dirty or unbalanced, or from the unit if its mounts have loosened. Finding the source means reaching the unit through the access panel and inspecting inside.
Who it's for
Installing a concealed unit in your new home
We check the ceiling void depth, mark the unit position, access panel location and drain route before the plasterboard is closed, so nothing needs reopening later.
Ask on WhatsAppA ceiling stain has appeared in your office or shop
We reach the concealed unit through the access panel, find whether the overflow is from the drain pan or the drain line and fix it without breaking the fitted-out ceiling.
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What the service covers
- Access panel check
- Evaporator coil and drain pan
- Drain fall and trap test
- Blower check and airflow balance
- Electrical readings and overflow tray
How we work
How we work
- 1
Locate and access
We check that the access panel is in the right place and large enough for the technician to reach the full unit without damaging the ceiling; if there is no panel, we mark where one should go.
- 2
Internal inspection
Through the access panel the technician inspects the evaporator, blower, drain pan and drain line and records the condition of each, so we know exactly where the fault is before starting work.
- 3
Clean and reset the drain
We clean the evaporator with a suitable cleaner, clean the blower wheel and drain pan, then flush the drain, check the trap and confirm the line falls the right way all the way to the discharge point.
- 4
Run and confirm
We run the unit, measure airflow at each grille and watch the drain pan to confirm no water is collecting, then show you what we found and what we did.
Proper service or wait for damage?
| Alrabih | The usual way | |
|---|---|---|
| Drain pan | Cleaned and fall confirmed | Overflows, ceiling stains |
| Drain trap | Checked and refilled if dry | Dries, air enters line |
| Evaporator coil | Cleaned, cooling maintained | Dust cuts cooling |
| Access panel | Located and easy to reach | Missing or in the wrong place |
| Blower wheel | Cleaned, balance restored | Dirt causes vibration |
Everything your AC needs, from one team
From system design and duct fabrication to installation, commissioning and maintenance.
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Some of our work
Ductwork, rooftop units and diffusers, from work we've completed in Jeddah.
Customer reviews
What our customers say
- Muhammadramzan 2641
“MashaaAllah. Services are so good. Behaviour and kindness 100/100. Prices are less then Market. Fully recommended”
- shahzeb armani
“Wow. Prices are so comfortable. Outstanding services. People are so talented and nice”
- Tawfik AlyawerLocal Guide
“U can find all u need for air conditioning”
Your satisfaction matters to us! If you had a great experience with us, we'd love a 5-star rating and a kind review.
Worked with us? Leave a reviewService areas
We come to you anywhere in Jeddah
From Al Shiraa and Al Yaqout in the north to Al Thaghr and Al Quraiyat in the south, with our base in Al Aziziyah.
What sets this district apart
Al Durrah is a medium-density residential district with multi-storey blocks mixing small villas and flats, each building usually having one central AC system serving several units. False ceilings are very common here for a modern look and to hide ducts and cables, but this means the coil and drain are completely hidden and deterioration only shows when performance drops. Coordination with the building management may be needed to access the central cupboard in an upper floor or basement.
Al Durrah is a developed residential district in north Jeddah, comprising modern multi-storey blocks and small villas with regular planning and spacious streets.
Most central systems here connect to a main distribution cupboard on the top floor or basement, serving several flats via ducts under false ceilings.
The AC setup in Al Durrah
- 1
Shared central distribution cupboard
Buildings here typically have one central distribution cupboard serving several flats, located in the attic or basement.
- 2
Concealed central coil and main drain
The main coil and drain pan are hidden within the cupboard, and the main drainage line runs under the false ceilings to the building's exterior.
- 3
Distribution ducts beneath each false ceiling
Individual ducts for each flat branch from the main duct and run beneath that flat's false ceiling directly.
Before the visit
Before our visit in Al Durrah
- 1
Coordinate with building management in advance
Contact the building management at least a day before the visit and inform them the team will need access to the central cupboard and attic or basement.
- 2
Ensure a safe ladder is available in the cupboard
Accessing the coil and drain pan may require a safe ladder, so confirm it is available in the cupboard or let us know beforehand.
- 3
Ask about the main drain line location
Confirm the building management knows where the main drain line exits the building, so we can inspect it if needed.
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FAQ
Questions about Concealed central AC
How does the technician reach the unit without breaking the ceiling?
Through the dedicated access panel in the plasterboard. If the panel is there and directly in front of the unit, the technician goes straight in. If it is missing or in the wrong place, we mark the right position and cut it cleanly without touching the rest of the ceiling.
What causes the drain pan to overflow onto the plasterboard?
The two most common causes in Jeddah are a drain line blocked by algae that grow in the high humidity, and a dry trap that lets air in and stops the water moving. Both can be fixed without replacing the unit, provided there is no mechanical damage.
Does Jeddah's humidity affect concealed units more than other types?
Yes, a concealed unit sits in a closed void with little ventilation, so more condensate collects on the drain pan than in an exposed unit. That makes the drain line and trap more likely to block or dry out, and keeping them clear matters more here than for any other unit type.
Can a concealed unit go into a ceiling that does not have enough depth?
The depth needed varies with the unit type and dimensions, and only a site survey decides. If depth is borderline, we check whether the plasterboard ceiling can be dropped slightly in the unit zone. If that is not possible, we suggest a better fit for the room size and ceiling height.
Does the plasterboard ceiling need a minimum void depth to fit both the concealed unit and the drain line?
Yes, the unit body needs a certain height, and on top of that the drain line must slope continuously from the unit to the discharge point. The actual void depth required depends on the unit type, the drain run length and where the discharge is; only a site survey gives the exact answer.
My flat is in a multi-storey block, how does your team reach the central AC?
We coordinate with the building management to access the central distribution cupboard, whether in the attic or basement, and from there clean the main coil and drain.
Air from the grilles is cold but very weak, what could be wrong?
Weak distribution may point to blockages in the ducts or heavy buildup on the coil restricting airflow, so we clean the coil, ducts and drain.
The false ceiling is yellowing and damp, is this serious?
Yellowing and dampness usually signal a leak or ongoing condensation dripping onto the plasterboard, so we clean the drain and coil and check the drain fall gradient.
The building management needs advance notice, how long does coordination take?
Coordination is done by calling the building management at least a day before the visit, and we advise you to tell them the team will need access to the main cupboard.
