Desert cooler, proper duct
Evaporative (desert) duct installation in Al Sharafiyah
In Al Sharafiyah, central Jeddah, evaporative duct cooling suits the warehouses, workshops and large commercial buildings that need cost-effective air distribution. We mount the cooler on the roof and run galvanised duct to the spaces to be cooled with regulated exhaust openings.
- 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.
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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
Most commercial and industrial buildings in Al Sharafiyah are wide open units with high ceilings and limited natural ventilation, making central duct cooling a practical choice for warehouses, large shops and workshops. The flat roofs of newer buildings make mounting the evaporative cooler straightforward, and galvanised duct handles the intense heat and coastal humidity in the area. A site survey determines whether the relative humidity allows evaporative cooling efficiency in these spaces.
Al Sharafiyah sits in central Jeddah and contains wide commercial and industrial buildings with flat roofs and open land for expansion.
Most warehouses and workshops here need uniform airflow through central duct to cover large floor areas efficiently.
The AC setup in Al Sharafiyah
- 1
Central duct from a single roof-mounted cooler
The wide, flat spaces in Al Sharafiyah allow a single evaporative cooler on the roof with unified galvanised duct covering the warehouse or workshop.
- 2
Multiple exhaust openings for large spaces
Large buildings need several exhaust openings distributed across the space to ensure even airflow and prevent air pressure buildup.
- 3
Water drain piping for excess moisture
The evaporative cooler produces moisture, so we install drain piping directed away from work and storage areas.
Before the visit
Before our visit in Al Sharafiyah
- 1
Confirm safe roof access
Check that the roof is safe to access and has sufficient clear space for mounting the cooler and main duct run.
- 2
Mark desired exhaust opening locations
Choose exhaust opening locations based on your space layout, and make sure drainage water will not affect other areas or workers.
- 3
Check roof condition and waterproofing
Inspect the roof to confirm its condition before installation, and tell us about any existing leaks or waterproofing gaps.
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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 evaporative cooling work for my large warehouse in Al Sharafiyah?
Yes, if the area's relative humidity is suitable. We carry out a site survey to assess whether evaporative cooling will deliver the efficiency your space needs.
My roof is flat but surrounded by other buildings, does that affect installation?
Flat roofs provide a good mounting location, but we check safe access and clearances from adjacent buildings during installation.
How does the intense heat and coastal humidity here affect galvanised duct?
Galvanised duct resists rust and corrosion from coastal humidity and intense heat in Jeddah, ensuring long system life.
How do you manage water drainage from the exhaust openings?
We design exhaust openings at proper angles and position them to avoid water pooling on floors or leakage into adjacent areas.
