Desert cooler, proper duct
Evaporative (desert) duct installation in Al Hamdaniyah
Evaporative duct installation in Al Hamdaniyah covers the extended commercial and residential buildings along the eastern road. The system distributes evaporatively cooled air through metal ducts from a single roof unit serving large areas.
- 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
Al Hamdaniyah has medium to large commercial and residential buildings more spread out than the coastal zones, with space patterns suited to evaporative duct systems. Shops, clinics and offices here prefer evaporative coolers because one unit serves the entire building without multiple indoor units. The eastern location means lower humidity than the coast, boosting evaporative efficiency, but seasonal dust can be higher, so regular maintenance is needed.
Al Hamdaniyah sits in east Jeddah along the eastern road, a commercial and residential zone with extended buildings and medium-sized interiors.
Shops, clinics and offices in Al Hamdaniyah typically need medium-capacity evaporative units with ducts distributed across multiple floors.
The AC setup in Al Hamdaniyah
- 1
Roof cooler with multi-floor duct expansion
Commercial buildings in Al Hamdaniyah need one roof unit with duct runs distributing air across multiple floors in thermal balance.
- 2
Exhaust openings on interior and exterior walls
Exhaust openings on both interior and exterior walls let hot air exit and maintain continuous circulation through the building.
- 3
Multi-stage filter system for dust
Multi-stage filters trap dust and particles before air enters the ducts, keeping the runs clean and performance stable.
Before the visit
Before our visit in Al Hamdaniyah
- 1
Check roof accessibility
Ensure the roof is safely accessible via an interior staircase or ladder and suitable for mounting the heavy cooler and ducts.
- 2
Identify electrical and water hookup points
Know where the nearest electrical circuit and water source are before the visit, so we plan the runs efficiently.
- 3
Tell us which areas to cool on each floor
Specify which floors and sections need cooling and which may need extra chill, so we plan the duct distribution easily.
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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.
Can one evaporative cooler serve all floors in our commercial building?
Yes, if the openings and ducts are properly designed. The site survey determines how many units are needed and how to distribute the runs across the different floors.
Dust is heavy on the eastern road in summer, how do you protect the cooler and ducts?
We use high-quality air filters in the cooler and design air inlets to minimise direct dust entry. Seasonal maintenance cleans the filters and ducts of any accumulated dust.
The eastern location has lower humidity than the coast, does that improve evaporative performance?
Yes, lower humidity noticeably improves evaporative efficiency. The wider gap between air temperature and dew point lets the cooler chill the air faster and more effectively.
If the duct runs are extensive, is there a power limit?
That depends on your existing electrical circuit and the cooler capacity. The site survey checks your current power rating and recommends any necessary upgrades.
