Dedicated duct workshop
Duct fabrication in Al Nakhil
In Al Nakhil, east Jeddah, large commercial buildings and warehouses need extensive central ductwork with large diameters. Alrabih fabricates large-diameter duct and complex sections in the workshop, ready for rapid installation with maintained air efficiency.
- G90 sheet
- Site dimensions
- Complex fittings
Clients We're Proud to Serve
Organisations and companies that trusted Alrabih with their projects.
Who needs workshop-fabricated duct?
- 1
A contractor with project-specific sizes
Your project has non-standard sizes or volumes too large for site cutting. We fabricate rectangular and round sections from your drawings at exact dimensions, labelled and ready to hang when they reach the site.
- 2
Fittings too awkward to cut on site
Elbows, transitions, offsets and takeoffs come out distorted when cut by hand on site, leaking air and creating noise in the line. We make them in the workshop at the right dimensions with tight seams.
- 3
Extending or renovating an existing duct network
You need new branches, a damaged section replaced or a fitting that matches an old duct size. We measure the existing network on site and fabricate the pieces to match what is already there.
Who it's for
Building a facility that needs non-standard duct sizes
We read your project drawings and fabricate all sections and fittings at exact dimensions from G90 or aluminium sheet, labelled and ready to hang the moment they reach your site.
Ask on WhatsAppRenovating home AC and need fittings to match old duct
We measure the existing ductwork in your home and fabricate the branches, transitions and elbows needed to match the original duct without replacing the whole network.
Ask on WhatsApp
What the fabrication covers
- Site measure or drawings
- G90 or aluminium duct
- Elbows transitions and takeoffs
- Tight seams to SMACNA
- Labelled sections ready to hang
How we work
How we work
- 1
Take measurements
A technician visits the site or you send us the drawings; we list every duct section needed, its size and the correct sheet thickness for that section.
- 2
Fabricate sections and fittings
We cut, form and lock the sheet in the workshop, including all elbows, transitions, offsets and takeoffs, and each section comes out at its exact dimension.
- 3
Label and prepare for delivery
We number every section and fitting against the assembly plan so the installation crew knows exactly where each piece goes, with no guessing on site.
- 4
Deliver to site
We deliver the duct to your Jeddah site protected and ready to hang. If you need an installation crew, we can arrange that as a separate step.
Workshop fabrication or site cutting?
| Alrabih | The usual way | |
|---|---|---|
| Dimensional accuracy | Workshop machines, tight dims | Hand variation on site |
| Complex fittings | Correct elbows and transitions | Distorted, leaking air |
| Seam quality | Tight lock, low leakage | Gaps weaken pressure |
| Site schedule | Arrives ready to hang | Extra time and site noise |
| Salt and humidity | Aluminium where site demands | One sheet regardless |
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 Nakhil is a sprawling zone of warehouses and large commercial buildings with expansive interior spaces and high ceilings, allowing extensive central AC systems with large ductwork. Fabricated ductwork here requires precise calculations to balance air across wide areas and ensure cooling reaches distant corners. Fast installation matters because warehouses and shops typically need quick activation after basic construction.
Al Nakhil, east Jeddah, is a sprawling zone of large warehouses and commercial buildings with expansive interior spaces.
Central ductwork for warehouses and large shops here typically needs large diameters and long branches distributed across wide areas to balance pressure and cooling.
The AC setup in Al Nakhil
- 1
Large-diameter main duct with extensive branches
Warehouses need large-diameter main trunk that branches into runs spread across wide floors to carry high airflow at uniform pressure.
- 2
Long sections with minimal bends
Wide-open spaces allow relatively straight duct runs, so we produce long sections with few bends to minimise pressure loss.
- 3
Calibrated joints for high-pressure applications
Large duct carries higher air pressure, so we produce extra-tight joints using metal sealing and specialized compound to withstand the load.
Before the visit
Before our visit in Al Nakhil
- 1
Get the full warehouse or shop floor plan
Request the complete interior floor plan with ceiling height and load-bearing column positions so we calculate main trunk and branch routes.
- 2
Confirm the outdoor unit and drainage point
Tell us where the outdoor unit will mount (usually roof or side wall) and where condensate will drain so we determine main duct directions.
- 3
Confirm passages can support duct weight
Check that ceilings, walls and cavities can support large-diameter duct weight and mounting brackets, and inform us of any structural limits.
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FAQ
Questions about Duct fabrication
Can you fabricate from drawings without visiting the site?
Yes, when the drawings are clear and carry the actual as-built dimensions. If a dimension is uncertain or a field change has been made, we prefer a site visit to avoid a fabricated piece that does not fit. We discuss the better approach with you before starting work.
What is the difference between galvanized and aluminium sheet for duct?
G90 galvanized sheet is the standard choice for interior duct: strong and suited to a range of pressures. Aluminium is lighter and handles Jeddah's coastal humidity and salt air better, making it right for some exposed applications or where structural load is a limiting factor. The correct choice depends on the site.
Can you make elbows and transitions to match an existing duct network?
Yes. We measure the existing network on site to match sizes precisely, whether you need a new branch added, a damaged fitting replaced or an extension tied into the original ductwork. The right approach is confirmed after the site visit.
How do you choose sheet thickness for each section?
Thickness follows section size: a large duct needs heavier sheet to hold its shape under pressure, a small one can use lighter material. We apply the SMACNA requirements to each section in the project individually, not a single thickness across the whole job.
Does Jeddah's humidity and salt air affect which sheet material to use?
Yes, particularly for sections exposed to outdoor air or installed near fresh-air intakes. G90 galvanized sheet performs well inside the building, but aluminium is the better choice where duct is in continuous contact with Jeddah's humid, salt-laden air. The site survey determines the right material for each section.
The warehouse is huge and the interior space is very open, how do you get cold air to every corner?
We fabricate a main trunk with large diameter and secondary branches spread evenly across the space. We calculate each branch length and pressure to ensure uniform cooling throughout.
The duct has to run through long walls and deep cavities, can it be installed easily?
The fabricated duct comes in long, lightweight sections that allow rapid installation across wide cavities. We distribute the load on sturdy mounting brackets designed for large spans.
Intense heat and direct sun affect the external ductwork?
We use heat-reflective metals (aluminium) and thermal insulation if needed to maintain air temperature in long external runs exposed to direct sun.
Drainage from the central unit can be complicated across a large footprint, how do you handle it?
We design a gradually sloped drainage line from the indoor unit to a designated outlet, with protective ducts to prevent water pooling during heavy operation.
