Desert cooler, proper duct
Evaporative (desert) duct installation in Al Amwaj
In Al Amwaj, north Jeddah, evaporative duct installation suits the modern villas and large homes with expansive layouts and exposed roofs. Alrabih's team carefully opens and seals the roof, running galvanised duct to distribute cool air evenly through living and sleeping zones.
- 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.
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 Amwaj is a modern residential district of detached villas and semi-detached homes on large plots with exposed roofs and open architectural designs. This building pattern provides ample roof space to mount the evaporative cooler and run duct without clashes with existing structures. The spacious layouts and good natural ventilation make evaporative cooling an efficient solution when humidity is relatively low during certain months.
Al Amwaj lies in modern north Jeddah, a district of detached villas with contemporary designs and spacious roofs.
Villas here are typically single or double-storey with exposed roofs that allow evaporative unit installation without major structural changes.
The AC setup in Al Amwaj
- 1
Evaporative cooler on the exposed roof
Modern villas in Al Amwaj have spacious, exposed roofs that make the evaporative cooler easy to mount and ventilate properly.
- 2
Galvanised duct distributed through open spaces
The open villa layout allows one or more duct runs to reach all zones without blockage.
- 3
Air exhaust openings in walls and windows
Humidified air exits through openings in external walls or pre-determined windows to maintain balanced air circulation.
Before the visit
Before our visit in Al Amwaj
- 1
Ensure safe roof access
Check the roof stairs and walkways to ensure the team can ascend safely and carry equipment without difficulty.
- 2
Clear duct pathway areas
Confirm that internal corridors and walls are clear of obstacles that might impede duct runs between the roof and rooms.
- 3
Identify exhaust points and external wiring
Agree with the team in advance on exhaust opening locations and electrical runs from the panel to the roof to avoid on-site modifications.
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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.
Does evaporative cooling suit modern villas in Al Amwaj?
Yes, if the villa has an open layout and accessible roofs. Our site survey confirms whether evaporative cooling suits your space and the area's climate.
The villas' roofs are spacious, how do you mount the cooler and duct?
We carefully open the roof, secure the evaporative cooler without affecting the structure, and run galvanised duct to reach all living and sleeping areas.
Al Amwaj is coastal, does salt air affect evaporative equipment?
Salt air can accelerate corrosion in unprotected metals, so we use corrosion-resistant materials and perform regular checks to keep equipment efficient.
Does the roof-mounted unit need dedicated electrical runs?
Yes, a dedicated electrical run from the main panel to the rooftop unit is needed, and we verify circuit capacity before installation.
