Balanced air distribution
AC duct installation in Muraykh
In Muraykh, east Jeddah, AC duct installation in modern villas and residential blocks balances open-plan design with the need for even airflow distribution. Alrabih calculates each branch to match the unit's capacity and coastal humidity, ensuring effective cooling throughout.
- Sized branches
- Sealed insulation
- Clean return path
Clients We're Proud to Serve
Organisations and companies that trusted Alrabih with their projects.
When you need a properly designed duct fit
- 1
One room cold, another warm
The unit runs but one room is too warm while the next is too cold. The cause is usually unbalanced branches or a diffuser that was never adjusted, not a fault in the unit itself.
- 2
Moisture and sweating on the ceiling
In Jeddah's humid air, uninsulated cold duct sweats on the outside and water collects on the plasterwork. Proper insulation with Armaflex or Kimmco stops the problem before it damages the ceiling finish.
- 3
Installing a concealed unit in a new build
The right time to fit duct properly is during the fit-out, before the false ceiling closes. We agree plenum dimensions, branch sizes and the return-air route at the survey before any work starts.
Who it's for
Fitting a concealed unit in your new villa
Before the false ceilings close, we design the plenums, branches and return-air route to suit the unit and each room in the villa.
Ask on WhatsAppSweating ceiling and uneven airflow in your building
We inspect the existing branches and return-air path, re-insulate the cold duct, and set the dampers so temperature evens out across every section of the building.
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What the duct installation covers
- Supply and return plenums
- Sized branch to each room
- Armaflex or Kimmco insulation
- Diffuser balancing with dampers
- Airflow check before ceiling closes
How we work
How we work
- 1
Site and unit survey
We measure the rooms and study the unit's data and plenum spec, and we settle the return-air route before deciding on branch sizes.
- 2
Design branches and plenum
We size each branch so it takes the right share of air without starving rooms farther from the unit, and we plan a return path with a correctly sized intake opening.
- 3
Fit and insulate
We fix the plenums and branches using SMACNA-standard duct, then insulate every cold surface with a sealed layer that stops sweating in Jeddah's high humidity.
- 4
Balance and hand over
We set each diffuser damper and check airflow in every room with you before the false ceiling is closed, then leave the site clean.
Designed duct or just connected duct?
| Alrabih | The usual way | |
|---|---|---|
| Branch sizing | Calculated per room | Connected without sizing |
| Return air | Routed with a sized intake | Left to chance |
| Duct insulation | Sealed against sweating | Thin or absent |
| Diffuser balance | Damper set per room | All diffusers fully open |
| Pre-closure airflow check | Done with you before closing | Faults found after ceiling closes |
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
Muraykh mixes modern spacious villas with medium-sized apartment blocks, and wider streets and varied architectural designs than the older districts. This variety means duct installation differs from building to building, possibly central in a large villa or split among units in an apartment. The high coastal humidity makes good insulation essential to prevent sweating and odour, and coordination with the builder or owner is necessary because ducts run through ceilings and walls that may be design-sensitive.
Muraykh is in the east, a mixed development with modern villas and apartments of varied design.
Most villas in Muraykh are designed for central ducting, whilst apartments may need separate duct runs per flat or commercial unit.
The AC setup in Muraykh
- 1
Central duct in spacious villas
Modern villas in Muraykh typically need one central duct that splits into branches covering the living area, bedrooms and kitchen in balanced proportion.
- 2
Separate duct per unit in apartment blocks
Multi-unit apartment blocks need separate duct for each flat or shop, with independent drainage for each.
- 3
Moisture-resistant insulation with effective drainage
Thermal insulation uses moisture-resistant materials, and multi-level drainage prevents water pooling and odour.
Before the visit
Before our visit in Muraykh
- 1
Get the building plan and owner approval
Show us the villa or apartment plan and any owner approvals, as design varies from property to property.
- 2
Confirm final positions for indoor and outdoor units
Agree with the owner on the best location for the outdoor unit (garden or safe wall) and indoor unit (room or ceiling), as this affects duct length and efficiency.
- 3
Verify power availability and installation space
Confirm a dedicated heavy-duty electrical circuit is in place and sufficient space exists in the ceiling or walls to run ducts without hitting lights or structural features.
More districts for AC duct installation
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FAQ
Questions about AC duct installation
Why does duct in Jeddah sweat more than elsewhere?
Jeddah's outdoor air carries high moisture because of its coastal location. When that air touches a cold duct surface, the moisture condenses immediately. Insulating with a thick enough layer of Armaflex or Kimmco, with all joints sealed, raises the outer surface temperature above the dew point and stops the sweating.
Does a longer branch deliver less air to the room?
Yes, a longer branch resists airflow more than a short one. This is why we size each branch individually, so near and far rooms receive balanced quantities of air, and we complete the adjustment with dampers during start-up.
How do you size the return-air opening?
The intake opening must be large enough so the unit does not work against negative pressure that strains it. We check the unit data and plenum requirements and decide size and position at the survey, because placing it behind a closed door or away from occupied areas changes the calculation.
Does a large room need more than one air outlet?
Usually, yes. A long majlis or a wide living room cannot be served by one outlet, because the air cools one end and leaves the other. We spread the outlets along the room, split the branch between them, and keep them away from the return grille so cool air does not go straight back to the unit.
Does the duct material affect sweating and airflow balance?
Yes. Sheet metal duct holds its shape under air pressure, so flow quantities stay as designed. Flexible duct can compress or sag, changing its cross-section and upsetting the balance. We therefore fabricate the main branches from galvanised sheet in our workshop and use flexible duct only for the shortest possible connection at each diffuser.
My villa has a contemporary open design, will the duct ruin the look?
We use a low-profile false ceiling or conceal the duct within walls where possible, so it stays invisible and does not affect the modern appearance.
The building has multiple units, how do we install separate duct for each flat?
We install a separate AC unit for each flat with its own independent duct run reaching it from outside, so there is no cross-talk between units.
Humidity is causing strange odours in the duct, how do we prevent it?
We use moisture-resistant thermal insulation and clean the duct after installation, with a condensation drain so no stagnant water breeds mould.
Where should the outdoor unit sit, in the garden or on the wall?
It depends on the building's design and available space. We assess the site during the visit and advise you on the best location that ensures good ventilation and structural safety.
