Balanced air distribution
AC duct installation in Al Andalus
In Al Andalus, west Jeddah, AC duct installation in modern villas and residential blocks needs expert design to ensure uniform cooling. Alrabih's team insulates all cold duct and balances airflow to each room, preventing hot or cold spots.
- 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 Andalus is a modern residential area marked by spacious villas and contemporary apartment blocks with orderly architecture and high ceilings. This design permits central ductwork to run flexibly under suspended ceilings or within walls. Coastal humidity and intense summer heat mean duct insulation must be thick and high-grade to prevent sweating and condensation. Balancing airflow to each room by its actual needs ensures consistent thermal comfort.
Al Andalus lies in west Jeddah, a modern residential area combining spacious villas and well-developed apartment blocks with contemporary amenities.
Most central units serve a single villa or flat, with capacity of 2 to 6 tonnes depending on floor area and storeys.
The AC setup in Al Andalus
- 1
Central duct with main plenum box
Modern Al Andalus villas and flats provide ample space for the main plenum box and distributed branches with higher efficiency.
- 2
Flexible and adjustable secondary branches
Secondary branches distribute from the main plenum to each room or living zone, with scope for future adjustment if home layout changes.
- 3
Standard foam insulation with vapour seal
Main and cold ducts are wrapped in standard foam insulation with a vapour seal on the external surface to protect against coastal moisture.
Before the visit
Before our visit in Al Andalus
- 1
Confirm outdoor and indoor unit locations
Tell us where the outdoor unit will be (villa roof, balcony) and the indoor unit (suspended ceiling, plant room) before the design visit.
- 2
Ensure ceiling and wall cavity access
Check that there is safe access to suspended ceilings and wall cavities where duct will run, with no electrical hazards in the way.
- 3
Agree duct routes with contractor before final construction
If the villa or flat is under development, agree duct and branch routes with the contractor beforehand to avoid conflicts with wiring and plumbing.
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 very large with multiple wings, will one central unit suffice?
If the spaces are connected by one central duct with distributed branches, typically one unit suffices. However, if the wings are separate or far apart, you may need two units.
The outdoor unit is on the roof and the indoor unit in the ceiling, how do you safely route the pipes?
We route refrigerant lines through protected outer or inner walls with thick insulation along the entire path to prevent cooling loss and condensation.
We have very intense summer heat, does that affect duct efficiency?
Yes, intense heat means uninsulated duct will lose cooling. We use thick foam insulation with a sealed vapour barrier to minimize loss and maintain cold-air integrity.
How do you solve the problem of some rooms getting too cold and others too warm?
We size branches based on each room's size and location, and fit adjustable dampers at diffuser openings to balance flow during the initial commissioning and future adjustments.
