Desert cooler, proper duct
Evaporative (desert) duct installation in Al Bawadi
In Al Bawadi, central Jeddah, evaporative duct installation serves factories, workshops and large commercial properties that need efficient cooling at low cost. Alrabih's team opens the roof carefully and runs galvanised duct to reach every corner of the space to be cooled.
- 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.
Split AC installation
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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 Bawadi is a mixed commercial and industrial zone with buildings that have large open interiors and no architectural constraints. The spacious open layouts make evaporative cooling a logical choice when operating costs matter. However, Al Bawadi's central location near coastal areas means humidity can be higher than expected in some seasons, so a site survey is essential to measure whether humidity levels allow effective evaporation. Duct runs from the roof and needs precise sealing against leaks and dust from traffic and industrial activities.
Al Bawadi is in central Jeddah, a commercial and industrial zone with spacious buildings and high roofs.
Most workshops and factories here need large-diameter duct running against high heat and sometimes humid air.
The AC setup in Al Bawadi
- 1
Central roof unit with branching duct network
Large factories and workshops benefit from one central unit distributing cool air through multiple branches covering all sections.
- 2
Side ducts with graduated diameters
The main duct has a large diameter, and side branches taper gradually to balance airflow and reduce losses.
- 3
Exhaust openings distributed across the roof
Instead of one opening, distributing exhaust across several points reduces noise and improves balance in each zone.
Before the visit
Before our visit in Al Bawadi
- 1
Confirm safe roof access and opening points
Check that the roof is safe to work on and identify where to mount the unit and duct away from the working area.
- 2
Choose the exhaust opening locations
Identify on the roof where you want exhaust openings before the visit, away from worker and equipment entry points.
- 3
Show us the available electrical routing path
Point out the safe path for running the electrical cable from the distribution panel to the roof.
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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.
Our factory is huge, is one duct run enough or do we need several branches?
Large spaces need a main duct that branches into multiple runs, and the site survey determines how many branches and their diameters.
Central Jeddah has traffic and dust, does that affect the duct?
Yes, street dust can enter through exhaust openings or small gaps, so we recommend protective screens and regular duct cleaning.
Central Jeddah is near the sea, does humidity reduce evaporative cooling efficiency?
High humidity can lower efficiency, and the site survey confirms whether evaporative cooling suits your location or another option is better.
Our electrical panel is far from the roof, how do you install the fan power?
We run an electrical cable from the panel to the roof depending on the distance and power needed, and the survey determines if the existing circuit is sufficient.
