Desert cooler, proper duct
Evaporative (desert) duct installation in Al Wurud
In Al Wurud, central Jeddah, evaporative duct cooling suits larger residential buildings, small hotels and wide commercial shops. We mount the cooler on the roof and run galvanised duct to all units or sections 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.
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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 Wurud contains a mix of medium-rise residential buildings, shops and small tourism buildings, most with flat roofs and relatively open layouts. Buildings here are newer than the old districts and offer better conditions for central duct installation. Coastal humidity and intense summer heat make evaporative cooling a reliable option if climate conditions permit, and a site survey confirms system suitability for each building.
Al Wurud sits in central Jeddah and holds residential and tourism buildings with shops and small hotels on relatively open land.
Residential and tourism buildings here often need distributed cooling reaching multiple units or sections within a single building.
The AC setup in Al Wurud
- 1
Unified duct for the entire residential building
Medium-rise buildings in Al Wurud can rely on a single evaporative cooler on the roof with galvanised duct distributing air to all flats or sections.
- 2
Separate exhaust openings per floor or section
The internal divisions in buildings require multiple exhaust openings distributed to ensure each floor or section receives balanced airflow.
- 3
Central water drainage system
The evaporative cooler produces moisture, so we install central drainage that collects water and directs it safely away from the building.
Before the visit
Before our visit in Al Wurud
- 1
Coordinate installation timing with building management
If the building is occupied, inform management and residents about the installation date to minimise disruption and allow team roof access.
- 2
Confirm internal duct routing with us
Review the building plans and identify the best routes for duct from roof to your units, avoiding conflicts with existing electrical and plumbing systems.
- 3
Check roof safety and weight capacity
Inspect the roof to ensure it can support the cooler and duct weight, and check existing waterproofing before installation begins.
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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 building has several flats, can evaporative duct cooling work for it?
Yes, if you want a unified system for all flats or certain sections. We assess the building to see if internal layout and humidity levels allow efficient operation.
Our roof is close to other roofs nearby, does that affect airflow and dust?
Closely spaced roofs can affect air circulation around the cooler. We check clearances and relative heights to ensure clean, effective air intake.
Humidity is very high in summer, is evaporative cooling actually effective?
High humidity reduces evaporative cooling efficiency. The site survey determines whether relative humidity allows acceptable performance for your needs.
How do you route the duct and piping inside the building during installation?
We plan routes with the architect or building owner to avoid conflicts with electrical and plumbing, and carefully coordinate openings to ensure uniform air distribution.
