Precision-made ductwork
AC duct manufacturing in Al Najmah
In Al Najmah, north Jeddah, where mid-sized villas and apartment blocks are the norm, central AC requires precisely made ducts for even cold distribution. Alrabih manufactures all supply and return ducts in advance in the workshop, sealed and insulated, ready to hang straight away.
- Sealed seams
- Full insulation
- Delivered ready
Clients We're Proud to Serve
Organisations and companies that trusted Alrabih with their projects.
When duct quality makes the difference
- 1
Duct losing cold air
An open seam or an unsealed joint loses cold air before it reaches the room. We close every seam with Foster sealant in the workshop before shipping, so the seal does not depend on site work alone.
- 2
Condensation wetting the ceiling
In Jeddah's humid air any bare metal surface sweats and drips onto the ceiling or damages the unit insulation. We wrap with Kimmco or Armaflex at the thickness the site calls for.
- 3
A project with many duct runs
A villa or commercial building needs main trunks, branches and plenums in several sizes. We make sections in the workshop numbered to the site plan, so the hanging crew assembles without cutting or adjusting.
Who it's for
Replacing your villa's AC and need new ductwork
We make supply and return trunks and plenums to your villa's dimensions, insulated and numbered, ready for the hanging crew without any on-site cutting.
Ask on WhatsAppRunning a commercial fit-out that needs duct runs
We take your project drawings and produce numbered sections in batches matched to your site schedule, so the hanging crew is never waiting on supply.
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What the manufacturing covers
- Supply and return trunks
- Unit plenums to opening size
- Seams sealed with Foster
- Kimmco or Armaflex outer wrap
- Numbered sections ready to hang
How we work
How we work
- 1
Send sizes or drawings
Send us the duct drawing or a list of section sizes. If sizes are not fixed yet, we agree a site survey before production starts.
- 2
Review sizes and sheet gauge
We check each section's dimensions and pick the right sheet thickness for the duct size, then confirm quantities with you before cutting begins.
- 3
Fabricate, seal and insulate
We cut and fold the G90 galvanised sheet, lock the seams with Foster sealant, and wrap each section with Kimmco or Armaflex insulation in the workshop before shipment.
- 4
Number and deliver
We mark each section with its position and dimension from the site plan, so the hanging team identifies every piece without confusion and starts work on arrival.
Workshop-made or site-cut duct?
| Alrabih | The usual way | |
|---|---|---|
| Sealing | Foster on every seam in workshop | Uneven site sealing |
| Insulation | Kimmco or Armaflex fully wrapped | Partial or delayed wrap |
| Sheet gauge | Chosen for each duct size | One gauge for everything |
| Assembly time | Numbered, assembled straight away | Cut and adjust on site |
| Joint fit | Workshop dimensions close every joint | Hand trimming breaks the seal |
Everything your AC needs, from one team
From system design and duct fabrication to installation, commissioning and maintenance.

Split AC installation
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Duct installation
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Central AC installation
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Duct fabrication
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Cold room installation
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Electro-mechanical works
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Chiller & AHU installation
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HVAC design
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AC repair & faults
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AC cleaning
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Refrigerant charging
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Central AC maintenance
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Chiller maintenance
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AC removal & refitting
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Duct cleaning & sanitising
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AC servicing by brand
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Operation & maintenance contracts
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AHU maintenance
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Fridge & freezer service
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Cold rooms
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Display fridges & chillers
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Factory HVAC
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Warehouse HVAC
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Villa & home HVAC
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Hotel HVAC
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School HVAC
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Hospital HVAC
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Mosque HVAC
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Mall & retail HVAC
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Restaurant & cafe HVAC
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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 Najmah blends mid-sized villas with multi-unit apartment blocks, many of them expanding or upgrading. Local contractors favour central AC for cost and efficiency, but on-site knife-cut ducts leave gaps that bleed cold and become mould sources in Jeddah's humidity. Shop-made sealed ducts mean faster hanging, better performance, and even cooling across every unit.
Al Najmah sits in north Jeddah, a district of mid-sized villas and apartment towers with ongoing development.
Most new and existing projects in Al Najmah choose central AC, with ducts routed through false ceilings and fans in mechanical rooms.
The AC setup in Al Najmah
- 1
Central duct network for apartment towers
Apartment towers in Al Najmah use unified or per-unit central duct networks, and shop-made ducts ensure consistent performance.
- 2
Villa ducts with multiple ceiling levels
Al Najmah villas often have multiple floors and false ceilings, requiring custom-made ducts that fit varying heights.
- 3
Insulated ducts against coastal humidity
Full insulation and precise sealing are essential in this humid area to prevent condensation and mould inside the ducts.
Before the visit
Before our visit in Al Najmah
- 1
Collect architectural plans and utilities layout
Gather the architect's plans, electrical water and gas layouts, and floor-by-floor dimensions before we visit.
- 2
Pinpoint the mechanical room and main unit
Confirm the mechanical room and central unit location and accessibility, and mention any structural obstacles we should know about.
- 3
Align manufacturing timing with the project schedule
Focus on when false-ceiling and painting work starts, so we manufacture ducts at the right moment before the ceiling closes.
More districts for AC duct manufacturing
Other services in Al Najmah
FAQ
Questions about AC duct manufacturing
How do you make sure the duct does not leak air at the seams?
We close the long seams with a tight mechanical lock as the sheet is formed, then seal every seam and every joint between sections with Foster sealant before insulating. Sections leave the workshop with matching flanges that tighten evenly when hung, because any small gap in cold duct means lost air and a point where condensation forms.
Does the duct arrive ready to hang, or is it assembled on site?
Sections arrive fabricated, insulated, sealed and numbered to the route drawing, so the fitters know where each piece goes without cutting or altering on site. What is left on site is joining the sections, fixing them to the hangers and connecting the unit and outlets, which shortens the work above the ceiling.
Do you make plenums for cassette and cabinet units?
Yes, we fabricate plenums for both types. A cassette unit plenum is measured to match the unit's outlet frame exactly so air reaches the branch runs without leaking at the connection. A cabinet unit plenum is made to carry both the supply and return paths if the design calls for it. Both types are insulated with Kimmco or Armaflex and sealed with Foster sealant before they leave the workshop.
Can you manufacture duct for a large commercial project?
Yes. The workshop is equipped to fabricate large supply and return trunk runs suited to commercial, government and industrial buildings. Each section is made to the project drawings, numbered and delivered ready to hang after insulation and sealing. When engineering drawings are available, the technical team reviews them before fabrication starts to confirm that the duct dimensions fit the ceiling voids on site.
Why are the duct sections insulated in the workshop before delivery?
The duct carries cold air through a ceiling void that may be hot and humid. Without external insulation, water vapour condenses on the cold sheet and drips onto the false ceiling or the goods below. So each section is wrapped in Kimmco or Armaflex in our workshop and every edge and joint is sealed with Foster sealant before delivery.
Our older building in Al Najmah wants new central AC, do you make ducts for multi-unit buildings?
Yes, we manufacture complete duct networks for apartment buildings, with separate ducts per unit or shared runs depending on design. We take precise measurements from the plans and deliver numbered sections ready to hang.
Our villa and building are close to the main road, does dust affect the ducts?
Tightly sealed shop-made ducts reduce dust ingress, and full insulation keeps the interior clean. We use Foster sealant on every seam to stop any air leakage.
Humidity and salt spray near the coast damage ducts, how do you protect them?
Fully insulated and tightly sealed ducts protect against condensation and humidity. We use materials rated for humid coastal environments and seal every seam before delivery.
The contractor wants quick ready-made ducts, how long does manufacturing and delivery take?
Once we receive the plans and measurements, we manufacture the ducts and deliver them numbered and ready. Timing depends on project size and complexity; send us the drawings for an exact schedule.












































































