Desert cooler, proper duct
Evaporative (desert) duct installation in Al Jamea
In Al Jamea, central Jeddah, evaporative duct installation suits the wide-open spaces and buildings with clear roofs. We mount the cooler on the roof, run galvanised duct to rooms and offices, and fit exhaust openings to let air circulate efficiently.
- 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 Jamea is a mixed zone of administrative and educational buildings with open areas and wide-accessible roofs. The buildings here are typically newer with large internal spaces needing unified cooling, and the roofs are usually free of obstructions, making it straightforward to position the cooler and run duct. Evaporative cooling works efficiently in this kind of layout because air moves freely and exhaust happens through controlled openings.
Al Jamea lies in central Jeddah, a zone of modern administrative and educational buildings with wide roofs and open ground.
Most buildings in Al Jamea are designed with pitched roofs suitable for mounting, and typically need unified duct runs across multiple floors.
The AC setup in Al Jamea
- 1
Roof-mounted cooler with unified duct run
The wide roofs in Al Jamea can accommodate a single cooler serving multiple floors through an organized galvanised duct run.
- 2
Exhaust openings distributed across floors
Air exits through regular openings on different floors, allowing fresh air circulation and exhaust without stagnation.
- 3
Roof weatherproofing and dust sealing
After installation we seal the area around the duct to prevent water and dust ingress into the building interior.
Before the visit
Before our visit in Al Jamea
- 1
Clear adequate space on the roof
Make sure the roof is clear of fixed and temporary obstructions before the visit so we can position the cooler securely.
- 2
Coordinate with building or facility management
Inform building or facility management of the visit date and scope of work, especially if there is any temporary operational downtime.
- 3
Ensure safe roof access for the team
Confirm that stairs or roof access are safe and can bear the weight of equipment and duct sections.
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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.
Is evaporative duct cooling right for a large office building?
If the building has large open areas and an accessible roof, yes. We carry out a site survey to confirm the duct can cover the required spaces and air circulates evenly.
Our roofs are wide but have other equipment, does that affect installation?
Yes, we need clear space on the roof to mount the cooler and duct safely. We coordinate with building management to find the best spot away from other equipment.
Summer heat in Al Jamea is intense, is evaporative cooling alone enough?
It depends on air humidity and the area to be cooled. The site survey will show whether evaporative cooling is sufficient or if you need supplementary cooling.
How do you keep the roof watertight after opening it for the cooler?
We open the roof carefully and mount the cooler on an insulated base, then seal the area around the duct with moisture and dust-resistant materials.
