Desert cooler, proper duct
Evaporative (desert) duct installation in Al Farouq
In Al Farouq, south Jeddah, evaporative duct installation is popular in factories, warehouses and large open markets. We mount the cooler on the roof and distribute cooled air through ductwork that reaches all parts of the facility.
- 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”
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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 Farouq mixes large factories, warehouses, open-air markets and workshops; most are single-level rectangular buildings with high ceilings and minimal internal partitions. Evaporative duct systems work efficiently here because air spreads easily in the open floor plans, but temperature swings between distant warehouse corners may call for advanced duct design and even outlet distribution, and roof sealing must protect against industrial dust and sand.
Al Farouq is in south Jeddah, an industrial and commercial zone of factories and large open-air markets.
Most factories and warehouses here use single or double ductwork of 500 to 800 mm diameter with 8 to 15 evenly spaced exhaust openings across the ceiling.
The AC setup in Al Farouq
- 1
Single or double medium-diameter duct
Medium-sized factories and warehouses here need 500 to 750 mm duct with even distribution along the length of the facility.
- 2
Multiple high-level exhaust openings
Mounting outlets high on the roof improves air turnover and efficiently expels heat and factory dust.
- 3
Roof-mounted water tank and pump
The cooler needs a 1000 to 2000 litre tank and pump to ensure consistent media wetting.
Before the visit
Before our visit in Al Farouq
- 1
Verify roof strength and support frame
Tell us the structure type (concrete or steel) and roof thickness and support spacing so we can calculate the load capacity for cooler and tank.
- 2
Identify water source and drainage outlet
Show where the main water meter is in the factory and where surplus water will easily drain away from the building.
- 3
Mark duct lengths and required outlets
Give us the facility dimensions in detail, number of sections, and priority cooling areas so we can map duct routing and outlets accurately.
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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.
Will the evaporative cooler work in a factory with different sections?
Yes, but each section may need separate ductwork or targeted outlet placement based on its function. We survey the layout first to decide the best distribution.
The roofs here are concrete slabs, can we mount the cooler safely?
Yes, concrete slabs are common in Al Farouq and support the cooler well, but we check slab thickness and supports first; we may need extra bracing if the cooler and water weight is high.
Heat and humidity in Al Farouq are very high, does this affect cooler efficiency?
The evaporative cooler relies on dry air, so high humidity reduces its efficiency slightly. But in Al Farouq the air is drier than the coast, so performance stays good, especially if exhaust openings are high and allow fast air turnover.
Where do we connect water to the cooler, and are there drainage issues?
We check where main water pipes run inside or outside the factory, and excess water drains away via a floor slope. Before installation we ensure drainage is easy and water won't pool under the facility.
