Balanced air distribution
AC duct installation in Al Salmiyah Al Sharqiyah
In Al Salmiyah Al Sharqiyah, south Jeddah, duct installation in mid-size villas and residential flats suits the needs of varying spaces. Alrabih designs efficient duct, insulated to protect building structures from intense coastal humidity.
- 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.
Split AC installation
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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 Salmiyah Al Sharqiyah holds mid-size villas and diverse residential flats, some needing central AC and others suited to smaller or hybrid systems. Duct design must be flexible to fit varying spaces and layouts. High coastal humidity and proximity to the sea make strong insulation essential to prevent condensation on ceilings and interior walls and to protect structures over time. Coordinating with villa owners or building management ensures routes respect existing layouts and tenant arrangements.
Al Salmiyah Al Sharqiyah, in south Jeddah, is a district of mid-size villas and diverse residential flats close to the coast.
Villas and flats in Al Salmiyah Al Sharqiyah use a mix of central units and individual splits; duct systems typically serve 2 to 3 rooms.
The AC setup in Al Salmiyah Al Sharqiyah
- 1
Simple single or double-branch duct
Small villas and flats in Al Salmiyah Al Sharqiyah typically need simple duct with one or two branches for efficient coverage.
- 2
Strong moisture-resistant standard insulation
Duct is insulated with strong moisture-resistant material to withstand high coastal humidity and prevent long-term condensation.
- 3
Evenly distributed diffuser outlets
Outlets are distributed evenly across the served rooms to ensure proportional cooling in every space.
Before the visit
Before our visit in Al Salmiyah Al Sharqiyah
- 1
Confirm the central unit location
Agree with us on the central unit location (ceiling void, interior wall, or storage) before the first visit.
- 2
Ensure team access to internal voids
Verify that wall and ceiling voids are safe and obstacle-free for duct runs and equipment access.
- 3
Tell us about building or block restrictions
If the building or villa has specific architectural restrictions, tell us before we visit so we can plan around them.
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 is fairly small, does it need complex ductwork?
Not necessarily, we design simple efficient duct scaled to your villa's size, perhaps just one or two branches.
Being near the coast increases humidity, is the duct safe from condensation?
Yes, we insulate all cold duct heavily to prevent condensation even in the highest coastal humidity levels.
My flat is in an apartment block, can duct be run without damaging walls?
Yes, we route duct through existing wall and ceiling voids wherever possible, and carefully repair any necessary small cuts.
How many rooms can one duct branch cool?
It depends on room size and heat load, but typically one branch serves two or three small rooms with balanced distribution.
