Desert cooler, proper duct
Evaporative (desert) duct installation in Al Dahiyah
In Al Dahiyah, south Jeddah, residential complexes and modern buildings benefit from efficient centralised cooling systems. Evaporative duct installation merges uniform distribution with efficiency through insulated ducts covering each residential unit.
- Sealed roof
- Galvanised duct
- Air changes
Clients We're Proud to Serve
Organisations and companies that trusted Alrabih with their projects.
When you need evaporative cooler duct
- 1
A large workshop or warehouse
Large industrial spaces get very hot in Jeddah summers and split units are expensive to run there. An evaporative cooler with distribution duct brings air to work areas at lower running cost, provided the space is ventilated and not sealed shut.
- 2
A majlis tent or seasonal space
Outdoor majlis areas and seasonal tents do not suit split AC units because of the structure. Evaporative duct delivers a cool air stream as long as the space is open enough for air changes, which the survey confirms.
- 3
Old duct with poor airflow
Old sheet duct cracks over time and air leaks from the joints before reaching the space. On site we check whether the problem is leaking duct, poor distribution, or the cooler size itself.
Who it's for
Need to cool a large workshop at reasonable running cost
We survey the workshop and check its ventilation, then run galvanised duct from the roof cooler to the work areas with exhaust openings that keep air moving through the space.
Ask on WhatsAppYou have an outdoor majlis that needs seasonal cooling
We check how open the majlis is and assess its structure, then design the duct route and exhaust openings so cool air reaches the seating area without humid air building up inside.
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What the work covers
- Weatherproof roof collar fitted
- G90 galvanised duct runs
- Branch and air outlet connections
- Exhaust openings for air changes
- Airflow check after start-up
How we work
How we work
- 1
Site survey first
We visit, measure the space and check how open it is, because evaporative cooling needs enough ventilation; without it humidity rises inside and the cooling effect drops.
- 2
Plan the duct route
We plan the main duct run, branches, air outlet positions and exhaust opening locations, and show you the layout before any work starts.
- 3
Install duct and seal roof
We open the roof, fit and seal the collar against leaks, then run the galvanised duct and hang it on proper supports so it does not sag.
- 4
Start-up and test
We run the evaporative cooler and check that air reaches every outlet and that the exhaust openings are working so fresh air is visibly moving through the space.
Planned duct or a quick run?
| Alrabih | The usual way | |
|---|---|---|
| Roof seal | Weatherproof, sealed collar | Silicone that cracks in heat |
| Sheet | G90 galvanised | Unspecified gauge |
| Exhaust | Sized openings for air changes | Left to chance |
| Space suitability | Confirmed by survey | Not checked |
| Duct supports | Fixed hangers along the full run | Duct left unsupported |
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.
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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 Dahiyah is a modern district with multi-unit residential complexes and relatively tall apartment blocks with shared roofs, requiring coordination with owners' associations and management. Buildings here are spread and slightly closer, which may limit duct routes but does not prevent them. Installation on shared roofs allows one cooler to serve multiple units, lowering costs and raising efficiency. Insulated duct requires careful concealment in common corridors or interior cavities.
Al Dahiyah lies in south Jeddah, a modern zone of multi-unit residential complexes, relatively tall apartment blocks, and shared roofs.
Most buildings in Al Dahiyah have shared roofs, and evaporative cooler installation serves multiple units, reducing costs by spreading them across several tenants or owners.
The AC setup in Al Dahiyah
- 1
Shared roof cooler with multi-distributed duct
One cooler on the shared roof serves several flats through distributed insulated ducts, reducing costs and consumption compared to separate coolers.
- 2
Exhaust vents distributed on interior ceilings
Ducts deliver cool air to each flat, with separate exhaust vents per unit to achieve pressure balance and independent ventilation.
- 3
Complete roof sealing against leakage
When we penetrate the shared roof for cooler and duct installation, we seal it completely against water and dust to protect all flats below.
Before the visit
Before our visit in Al Dahiyah
- 1
Obtain owners' association or management approval
Before the visit, secure formal approval from the owners' association or building management to use the shared roof and install the cooler and ducts.
- 2
Identify which flats will receive the shared duct
Tell us the numbers and locations of flats the shared duct will serve, so we plan the best duct route through interior ceilings.
- 3
Coordinate with residents about visit times and work
Notify residents before the visit about working hours and expected work, and ensure access to common corridors and roof is unobstructed.
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FAQ
Questions about Evaporative (desert) duct installation
Does evaporative cooling work in Jeddah in summer?
Evaporative cooling relies on water evaporation and weakens when humidity is high. In Jeddah, humidity is higher near the coast and lower inland. The survey decides whether the space and the season are suitable, which is why we do not start before visiting the site.
Why do exhaust openings matter as much as the duct runs?
An evaporative cooler pushes fresh air in continuously. Without an exit path, humid air builds up inside and the felt temperature rises. Properly sized exhaust openings keep air moving through, not piling up, and that is the core of how this type of cooling works.
What sheet do you use for the duct?
We use G90 galvanised steel sheet, which resists rust in Jeddah's humid and salty air. The duct sections are formed in our workshop before being taken to site, then hung on supports along the run to stop them sagging.
Can one cooler supply duct to more than one area?
Duct can be branched from one unit to more than one outlet, but each branch reduces the airflow at every opening. The survey decides whether the cooler has enough output for the total area, or whether a separate unit for each wing is the better answer.
Can evaporative cooler duct run through a false ceiling?
Evaporative cooling depends on continuous air movement and exchange, which requires exhaust openings in the same space the duct serves. A false ceiling restricts that flow unless dedicated openings lead air out of the building. The site survey decides whether the structure allows it, because the duct run and the exhaust are designed together as one system, not separately.
I live in an Al Dahiyah apartment with a shared roof, can one cooler serve several flats?
Yes, one cooler on the shared roof can serve several flats with distributed duct systems. This lowers costs and spreads them among owners. But you need approval from the owners' association or building management first.
How do you run ducts through shared ceilings between flats without disturbing residents?
We choose duct routes through existing cavities between floors or common corridors, with minimal noise and penetration. We coordinate with owners and residents before starting.
Al Dahiyah's buildings are relatively tall, does the duct lose coolness on the way from roof to flats?
Yes, long distances may cause coolness loss. That is why we use duct with strong insulation layers, and coordinate routes as direct as possible between roof and flats.
Is the shared electrical supply enough to run one cooler serving several flats?
We need to inspect the shared electrical circuit and its existing load. We may need a new dedicated circuit from the building's main board to meet the cooler's power needs.
