Desert cooler, proper duct
Evaporative (desert) duct installation in Al Tilal
In Al Tilal, east Jeddah, evaporative duct installation suits modern villas built on elevated terrain. Alrabih carefully routes the duct to avoid slopes and ensures even air distribution.
- 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 Tilal is a relatively modern area characterized by elevated terrain and spacious villas with multi-level roofs. The terrain and elevation affect cooler and duct placement, because duct must slope gently to drain any moisture that accumulates. The high roofs offer good space for the cooler, but duct routing requires care to avoid pockets and sharp bends that disrupt air flow.
Al Tilal lies in east Jeddah, a modern area of elevated terrain and spacious villas.
Most villas in Al Tilal have multi-level roofs, requiring precise duct routing to avoid bends and pockets.
The AC setup in Al Tilal
- 1
Roof cooler with gradient-bent duct
The metallic duct bends gently across different roof levels to avoid pockets and ensure moisture drains.
- 2
Exhaust openings sited by terrain slope
Exhaust openings are placed where terrain slope naturally assists warm air discharge.
- 3
Robust sealing on elevated roof against water ingress
The roof opening at elevation is sealed robustly to prevent water and dust infiltration.
Before the visit
Before our visit in Al Tilal
- 1
Assess safety of high-roof access
Check stairs or ladder to the high roof are safe, and tell the team of any obstacles or hazards.
- 2
Provide the team with a simple roof level sketch
A simple sketch showing different roof levels and existing pipes helps the team plan duct routing precisely.
- 3
Notify neighbours of elevated roof work
Closely spaced villas in Al Tilal may be affected by high-roof work, so notify neighbours in advance.
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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.
Do Al Tilal's elevated slopes affect evaporative cooler installation?
Yes, elevation affects cooler placement and duct slope. Our team's survey determines the best cooler location and duct route with proper gradient.
How do you route duct through multi-level roofs in the villas?
The team plans the route before starting, bending the duct gently to avoid pockets and sharp kinks that interrupt flow.
Does altitude and dry heat in eastern Al Tilal boost evaporative cooling efficiency?
Yes, the modest elevation and dry heat in the east provide good conditions for evaporative cooling, but the team measures heat and humidity during the survey.
Does duct on elevated roofs need protection from water and dust?
Yes, we first clear the roof and seal openings robustly against water and dust, and the duct itself is mounted with a gentle slope to drain any moisture.
