Desert cooler, proper duct
Evaporative (desert) duct installation in Al Ghawla
Evaporative duct installation in Al Ghawla serves the expanding commercial and residential buildings in east Jeddah. We mount the evaporative cooler on the roof and distribute cool air via galvanised metal duct reaching all sections.
- 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 Ghawla is a moderate expansion area with mixed-size residential and commercial buildings, their roofs usually orderly but often housing some existing equipment. The regular grid layout eases duct runs through interior passages and shared spaces, and straightforward roof access makes routine maintenance direct and efficient without the complications of tight constraints or many obstacles.
Al Ghawla lies in east Jeddah, an expanding area with a mix of residential, commercial and office buildings on orderly roofs.
Most commercial and residential buildings in Al Ghawla have flat roofs with enough space for the evaporative unit and duct runs covering multiple floors.
The AC setup in Al Ghawla
- 1
Roof evaporative unit with flexible duct in sections
Commercial buildings in Al Ghawla often have separate sections, so we install the unit on the roof and extend metal duct with flexible branches to each distinct section.
- 2
Exhaust openings on facades and roomy rooftops
Orderly rooftops and roomy exterior facades offer several options for placing exhaust openings without disturbing passers or neighbours.
- 3
Balanced distribution system for multiple sections
The duct can be designed to provide even cooling to multiple commercial or residential sections without needing separate units.
Before the visit
Before our visit in Al Ghawla
- 1
Clarify the building layout and sections
Provide a clear drawing or description of the building sections and areas to be cooled to plan the best duct layout before installation.
- 2
Verify existing rooftop equipment
List all tanks, AC units and equipment currently on the roof to avoid any conflict with the cooler and duct placement.
- 3
Coordinate interior access and passages
With the facility manager, identify safe passages and entry points for bringing installation equipment without disrupting staff or customers.
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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 evaporative duct suit a multi-storey commercial building in Al Ghawla?
Yes, if the building has an open ground floor or shared space, we can distribute duct across one or more levels, but this depends on your section layout and ceiling heights.
The passages between shops and offices are narrow, can we run duct through them?
This depends on passage width and available height above the ceilings. A site survey confirms whether duct can run without conflicting with existing pipes or wiring.
Dust in east Jeddah builds up quickly on metal, does the duct need frequent cleaning?
Yes, dust accumulates in the duct and openings, and we recommend cleaning at least twice yearly to maintain airflow and efficiency.
The commercial building has power divided into several sections, how do we wire the unit?
This depends on where the main panel is and available supply capacity. We identify the best electrical connection point during the site survey with your electrical maintenance team.
