Desert cooler, proper duct
Evaporative (desert) duct installation in Al Qurayyat
In Al Qurayyat, south Jeddah, evaporative duct installation serves villas and residential buildings with wide, accessible roofs. We mount the cooler on the roof, run duct to rooms, and fit regular exhaust openings to ensure effective air circulation in the hot climate.
- 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”
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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 Qurayyat is a growing residential neighbourhood in south Jeddah, featuring modern villas and some housing blocks with accessible roofs and varied architectural styles. Internal spaces are moderate to large, and roofs are typically obstruction-free. Evaporative cooling works efficiently here because the hot, dry air in this part of the city suits the evaporative system, and distributed openings allow continuous air renewal.
Al Qurayyat lies in south Jeddah, a growing residential neighbourhood of modern villas and housing blocks with wide roofs.
Most buildings in Al Qurayyat have accessible roofs and open architectural designs, typically requiring moderate-sized evaporative duct runs covering several rooms.
The AC setup in Al Qurayyat
- 1
Roof-mounted cooler for villa or residential building
Buildings in Al Qurayyat can accommodate a roof-mounted evaporative cooler serving most rooms through an efficient unified duct system.
- 2
Duct with air-filtering capability
Because of fine dust in the area, we fit filters on duct openings to prevent dust entering the rooms.
- 3
Thermal insulation and roof sealing
After installation we insulate and seal the area around the duct with robust materials to protect against heat, moisture and dust infiltration.
Before the visit
Before our visit in Al Qurayyat
- 1
Confirm safe and accessible roof
Ensure the roof is safe and unobstructed, and access stairs are sturdy enough to bear equipment weight.
- 2
Clear roof space for the cooler
Remove any temporary or unnecessary equipment from the roof before the visit so we can choose the best cooler position away from direct sun exposure.
- 3
Coordinate with household or building management
Inform household members or building management of the visit date and scope so they can prepare and facilitate roof and room access.
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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.
Is evaporative cooling right for a villa in hot Al Qurayyat?
Yes, Al Qurayyat's hot, dry air suits evaporative systems well. We survey the site to confirm the roof is accessible and spaces can accommodate the duct runs.
Fine dust is heavy in Al Qurayyat, does it affect the evaporative duct?
Yes, we must filter the air entering the cooler and seal duct openings tightly to prevent dust seeping indoors.
Our summer heat is extreme, will evaporative cooling provide adequate cooling?
It depends on humidity levels and the areas to be cooled. The site survey will determine if evaporative cooling alone is sufficient or if supplementary cooling is needed.
How do you protect the roof from heat and weather after opening it?
We mount the cooler on a quality-insulated base, then seal all openings and edges around the duct with materials resistant to heat, moisture and dust.
