Desert cooler, proper duct
Evaporative (desert) duct installation in Al Muzaira'ah
Evaporative duct installation in Al Muzaira'ah starts from the villa or building roof, where the cooler is mounted and insulated duct extends through various spaces distributing chilled air. Alrabih's team seals the roof tightly to prevent moisture and dust ingress.
- 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.
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 Muzaira'ah is a modern district with varied-size villas and mid-rise blocks on flat roofs, plus some mixed commercial and medical properties. The location is northern but slightly more humid than inland areas, and summer heat is intense. Evaporative ducting suits villas and blocks as it distributes air from one unit, but insulation is essential against moisture and dust, and air exhaust must be safely directed away from adjacent properties.
Al Muzaira'ah sits in upper mid-north Jeddah, a district of varied villas, blocks and some mixed commercial use.
Most Al Muzaira'ah properties have flat roofs, and the mix of villas and blocks means duct installation varies by building size and type.
The AC setup in Al Muzaira'ah
- 1
Separate roof cooler per building
Each villa or building receives its own roof cooler with completely separate ducting and outlets.
- 2
Heavily insulated duct against coastal moisture
Heavy insulation on the duct minimises cool air loss and condensation due to slightly higher Al Muzaira'ah humidity.
- 3
Safely directed exhaust outlets away from boundaries
External outlets direct air safely away from neighbours' properties and shared boundaries.
Before the visit
Before our visit in Al Muzaira'ah
- 1
Clarify roof ownership and shared spaces
If the building is multi-unit, clarify roof ownership and shared space rules, and any installation restrictions beforehand.
- 2
Gather details on all units or sections
If the property has a villa and clinic, tell us each section's needs separately so we plan the right solution for each.
- 3
Confirm power and safe drainage available
Verify there is safe power near the roof and cooler location, and that any water drainage is safely managed.
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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.
We have a villa and medical clinic in the same building, can evaporative ducting serve both?
Likely not. Clinics usually need precise central cooling and strict medical filters. We assess each section separately and recommend the right solution for each.
Does Al Muzaira'ah humidity affect evaporative ducting?
Slightly higher humidity reduces evaporative cooling efficiency somewhat. We measure humidity and temperature on the survey to ensure the system delivers the required performance.
The duct runs through my villa to my neighbour's, how do you keep air separate?
Each villa or building has its own separate duct system and outlets. Systems are completely independent with no air flow between properties.
How do you get equipment to the roof when buildings are sometimes tight?
Our team carries cooler and duct sections by hand when needed. We agree on the closest equipment parking and plan optimal access before the visit.
