Desert cooler, proper duct
Evaporative (desert) duct installation in Al Hijaz
In Al Hijaz, east Jeddah, evaporative duct installation suits mid-sized villas, large commercial shops and clinics. The cooler is roof-mounted and the team runs galvanised duct through interior spaces with exhaust openings sized for climate and daily use.
- 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
Al Hijaz is a mixed residential and commercial zone with mid-sized villas, shops, clinics and small warehouses, all with concrete roofs safe to work on. Interior layouts vary between villas and shops, requiring careful survey to plan the right duct route. The hot, dry climate makes evaporative cooling effective, but relative humidity may vary by exact location in the district, which will affect cooling efficiency.
Al Hijaz is a mixed eastern zone of Jeddah with villas, commercial shops, clinics and strong concrete roofs.
Evaporative duct in Al Hijaz requires careful humidity measurement to determine suitability and exhaust openings positioned so they do not disrupt adjacent medical or commercial operations.
The AC setup in Al Hijaz
- 1
Roof-mounted cooler with moderate duct for villa or shop
The cooler mounts on the roof and the duct extends at moderate length through the villa or shop according to its size and interior layout.
- 2
Exhaust openings away from sensitive areas
Exhaust openings are placed on the outer side or yard so warm air does not blow toward clinical operations or sensitive merchandise.
- 3
System with filters and routine maintenance support
The duct and openings have clean, replaceable filters and we recommend routine maintenance to prevent dust ingress and maintain cooling efficiency.
Before the visit
Before our visit in Al Hijaz
- 1
Confirm adequate roof space is available
Inspect the roof and confirm there is adequate and safe space for the cooler and initial duct before the visit.
- 2
Plan the duct route and avoid electrical lines
Tell us where electrical lines, water pipes or other obstacles are so we can route the duct safely away from them.
- 3
Coordinate with owner about installation timing
If it is a shop or clinic, agree on installation times outside working hours or sensitive clinical schedules.
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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.
My clinic needs evaporative duct, does it meet medical hygiene standards?
Evaporative duct with clean, regularly maintained filters can suit a clinic, but we will confirm the system does not introduce dust or excess humidity that might affect clinical cleanliness.
My shop has humidity-sensitive goods, does evaporative duct add moisture?
Evaporative duct adds minimal moisture in dry climates, but the survey measures current humidity levels and we will advise whether it suits your goods before installation.
The main street runs beside my shop, does traffic noise affect the duct system?
Evaporative duct runs quietly overall, and external traffic noise does not affect airflow or the cooler's mechanical performance.
The roof is small with many obstructions, can we still install the cooler?
The site survey assesses available space and obstacles. If space is very tight, we may suggest alternatives or advise postponing installation until adequate space is available.
