Desert cooler, proper duct
Evaporative (desert) duct installation in Tabah
In Tabah, north Jeddah, evaporative duct installation suits the spacious villas and buildings with exposed roofs. Alrabih runs galvanised duct from the cooler across the roof to the areas being cooled, with exhaust openings sized to the space.
- 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
Tabah is a modern residential area marked by scattered villas and buildings on wide plots, with flat, exposed roofs that simplify evaporative cooler installation. High summer heat and relatively dry air make evaporative cooling an effective choice here, but the wide spacing between villas means duct runs can be long and require careful planning.
Tabah lies in north Jeddah, a district of modern scattered villas with flat roofs and good natural ventilation.
Most Tabah villas have flat roofs that support the weight of the evaporative cooler and galvanised duct, with air exhaust usually through windows or side openings.
The AC setup in Tabah
- 1
Evaporative cooler on a flat roof
Most Tabah villas can accommodate the evaporative cooler on the flat roof because they have sufficient space and weight-bearing capacity.
- 2
Galvanised duct over long distances
Scattered Tabah villas require long duct runs from the roof to the rooms, which calls for precise sizing of the duct diameter and exhaust openings.
- 3
Exhaust vents through windows and side walls
Exhaust air usually exits through room windows or openings in the outer walls, which balances air pressure between indoors and outdoors.
Before the visit
Before our visit in Tabah
- 1
Clarify safe roof access
Tell us how to reach the roof from inside the villa, and make sure a safe ladder or roof door is available before the visit.
- 2
Identify the areas you want cooled
Prepare a simple sketch or mental map of the rooms and areas you want cooled, to help us plan the correct duct routes.
- 3
Check your roof condition and waterproofing
Inspect the roof for any existing leaks and tell us about its waterproofing, since we will open and carefully reseal it.
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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 Tabah villa?
Evaporative cooling suits spacious villas with flat roofs, and our site survey confirms whether it will work and maps the best duct routes for your space.
My roof is hard to access safely, how do you open it for installation?
We inspect the roof access and agree on the safe method with you before starting, choosing the opening location so it does not affect the structure or cause water ingress.
The distance from my roof to the living areas is quite long, does this affect cooling efficiency?
Yes, long runs increase air loss, but we size the duct and cooler based on distance and floor area to ensure proper balance.
The air here is quite dry, does the duct need special maintenance?
Dry air reduces mould growth, but we clean the exhaust vents and duct annually of dust and debris to keep air flowing properly.
