Desert cooler, proper duct
Evaporative (desert) duct installation in Harat Al Sham
Evaporative duct installation in Harat Al Sham, a historic area of old Jeddah, requires special study of older building roofs and narrow passages to determine duct evaporative system feasibility.
- 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.
Split AC installation
Request this serviceDuct installation
Request this serviceCentral AC installation
Request this serviceDuct fabrication
Request this serviceCold room installation
Request this serviceElectro-mechanical works
Request this serviceChiller & AHU installation
Request this serviceHVAC design
Request this serviceAC repair & faults
Request this serviceAC cleaning
Request this serviceRefrigerant charging
Request this serviceCentral AC maintenance
Request this serviceChiller maintenance
Request this serviceAC removal & refitting
Request this serviceDuct cleaning & sanitising
Request this serviceAC servicing by brand
Request this serviceOperation & maintenance contracts
Request this serviceAHU maintenance
Request this serviceFridge & freezer service
Request this serviceCold rooms
Request this serviceDisplay fridges & chillers
Request this serviceFactory HVAC
Request this serviceWarehouse HVAC
Request this serviceVilla & home HVAC
Request this serviceHotel HVAC
Request this serviceSchool HVAC
Request this serviceHospital HVAC
Request this serviceMosque HVAC
Request this serviceMall & retail HVAC
Request this serviceRestaurant & cafe HVAC
Request this service
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
Harat Al Sham is a historic area in old Jeddah, marked by tightly built old blocks with narrow, confined roofs and extremely tight exterior and interior passages and small window and roof openings. Duct evaporative cooling may not suit most old buildings here because space is so tight, but some redeveloped buildings or large shops might accommodate it. Galvanised duct needs a carefully routed path through very limited space, requiring extremely precise surveying and may not be practical in most cases.
Harat Al Sham lies in historic old Jeddah, a district of tightly built old blocks with narrow roofs and very limited open space.
Most old buildings here lack easily accessible roofs, and interior and exterior passages are so tight they cannot accommodate large-gauge galvanised duct.
The AC setup in Harat Al Sham
- 1
Very limited possibility of roof cooler system
Most old tightly built buildings here lack safe or accessible roofs for roof cooler installation because of their narrow, aged construction.
- 2
Very limited interior and exterior spaces
Interior and exterior passages in old downtown are so narrow they may not accommodate large galvanised duct runs.
- 3
Engineering inspection essential before any installation
Before considering any cooling system, we recommend thorough engineering inspection of the building, roof, electrical base and ventilation.
Before the visit
Before our visit in Harat Al Sham
- 1
Confirm access for team and equipment
Ensure passages and openings allow team and tools to enter without damaging the old building or neighbouring shops.
- 2
Coordinate with neighbouring buildings and shops
Tell neighbouring shop and building owners about the visit because shared spaces are so tight any activity affects their movement.
- 3
Initial engineering inspection of roof and electrical base
Before any detailed visit, we may recommend an initial engineering inspection by a specialist to determine whether any cooling system is feasible.
More districts for Evaporative (desert) duct installation
Other services in Harat Al Sham
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.
Does evaporative cooling suit the old buildings here?
In most cases, the old tightly built blocks here do not suit duct evaporative systems because roofs are narrow and passages extremely confined. We survey each site carefully to determine if the system is possible.
The passages are extremely narrow, how would you run the galvanised duct?
We need very careful surveying first. If passages are extremely narrow, we may not be able to widen spaces safely, and we may recommend alternative cooling solutions better suited to the site.
Old downtown humidity is high, does that affect evaporative cooling?
Yes, old downtown Jeddah has high humidity, especially because of the sea proximity and tightly built low-ventilation blocks. This greatly reduces evaporative efficiency, another reason the system suits few buildings here.
Buildings are old and roofs are weak, can they support a roof unit?
This needs precise structural inspection of the roof and frame. In most cases, old weak roofs cannot support additional unit weight, and we recommend engineer inspection before any installation.
