Desert cooler, proper duct
Evaporative (desert) duct installation in Al Thaghr
Evaporative duct installation in southern Al Thaghr suits large warehouses, big shops and spacious homes where high-capacity cooling is needed. We mount the cooler on the roof and run heavy-duty duct, with special handling for coastal humidity.
- 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.
Ask on WhatsApp
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 Thaghr is a southern coastal area with large warehouses, workshops and shops with spacious roofs, situated close to the sea where humidity and salt levels are very high. Evaporative cooling in Al Thaghr needs special handling because coastal humidity reduces evaporative efficiency, but the large spaces and wide roofs provide ideal conditions for long, heavy-duty duct runs, and good air discharge in these open areas partly offsets the humidity impact.
Al Thaghr sits in southern Jeddah on the coast, an industrial and commercial area with warehouses, workshops and wide roofs exposed to sea winds.
Most buildings here have flat, wide roofs clear of obstacles, making it straightforward to mount high-capacity coolers with large-diameter duct.
The AC setup in Al Thaghr
- 1
High-capacity cooler for large spaces
We mount a high-capacity evaporative cooler on the warehouse or large shop roof with cooling capacity matched to the expansive space.
- 2
Heavy-gauge galvanised duct
We run heavy-gauge galvanised duct with large diameter to ensure powerful airflow across expansive, open spaces.
- 3
Multiple distributed exhaust openings
We create multiple exhaust openings on different building walls to distribute hot air and prevent overpressure inside the space.
Before the visit
Before our visit in Al Thaghr
- 1
Confirm roof and structural strength
Check the roof and load-bearing beams are sound, and tell us if there are any repairs needed or weight restrictions.
- 2
Identify possible exhaust opening locations
Survey the warehouse or shop's external walls and identify which can have exhaust openings without damaging structures or neighbouring units.
- 3
Check high-capacity power availability
High-capacity coolers need a high-capacity electrical circuit, so check whether suitable supply is available or a new line is needed.
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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 Al Thaghr's coastal humidity affect evaporative cooling?
Yes, high humidity reduces evaporative efficiency, but Al Thaghr's wide roofs and open air allow powerful duct and effective discharge. The site survey determines whether the system will meet your needs for your space.
Large warehouses need big duct, can the building handle that?
We inspect the roof and wall structures to ensure they support the heavy cooler and galvanised duct weight, using strong brackets and fixings.
Do salt and sea winds cause the duct to rust quickly?
We use high-grade galvanised duct resistant to rust and salt, which extends the system's life in the coastal environment.
How do you manage exhaust openings in a large warehouse?
We distribute exhaust openings across different warehouse walls to achieve dynamic balance, using wind baffles to prevent hot air re-entry.
