Central AC, start to finish
Central AC installation in Al Amwaj
In Al Amwaj, north Jeddah, central AC installation in new villas and apartment blocks needs precise load calculations and integrated design. Alrabih handles everything from calculation through commissioning, so you take over a working system on day one.
- Design and build
- Own-workshop ducts
- Full commissioning
Clients We're Proud to Serve
Organisations and companies that trusted Alrabih with their projects.
Who needs a complete central system?
- 1
A new villa before finishing
The finishing stage is the right time to run central AC ducts before the ceilings close. Delaying the decision means extra cost later or compromises in the duct route that weaken airflow in certain rooms.
- 2
A commercial or office building
A commercial building needs airflow that fits how the floors are divided and how the load varies between levels. The site survey sets unit count, duct routes and outlet positions before any decision is made.
- 3
An old system draining power
Old units, deteriorating ducts and leaking copper push the electricity bill up without cooling the space properly. Replacing the whole system starts with a fresh load calculation, not with larger units pushed into the same old ductwork.
Who it's for
Building a villa and need ducts before ceilings close
We visit during the finishing stage, design duct routes and outlet positions, fabricate the ducts in our workshop and install them before the ceilings close, so you take over a fully working villa.
Ask on WhatsAppManaging a commercial building and replacing an old system
We recalculate the loads, design airflow to match the current floor layout and replace both units and ductwork completely so the system runs reliably without repeated faults.
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What the contract covers
- Load calc and system design
- Units from authorised distributors
- Duct fabrication and fitting
- Insulated Mueller copper runs
- Full commissioning and handover
How we work
How we work
- 1
Survey and load calculation
The engineer visits, measures each zone, and calculates the thermal load per area, accounting for facade orientation, ceiling height and how the space will be used in Jeddah's hot and humid conditions.
- 2
Design and unit selection
We draw duct routes and outlet positions and select units from Carrier, YORK, General, Midea, Gree or Smart Gold, then present the design to you before any work begins.
- 3
Fabrication and installation
Round and rectangular ducts are fabricated in our workshop from G90 galvanised sheet to SMACNA standards, then installed on site alongside the copper runs, insulation and electrical connections.
- 4
Commissioning and handover
We pressure-test the copper lines, vacuum them, check air balance at every outlet and condensate drain fall, then hand the system over to you in full working order.
One contractor or several parties?
| Alrabih | The usual way | |
|---|---|---|
| Design and build | One party accountable | Designer and installer split |
| Ducts | Our workshop, G90 standard | Unmonitored outside suppliers |
| Copper | Mueller up to 30 metres unwelded | Unknown source, many joints |
| Commissioning | Pressure test, vacuum, air balance | Straight power-on, no testing |
| Insulation | Armaflex and Kimmco fitted | Patchy or missing |
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 Amwaj is a modern district of spacious villas and large residential blocks with adequate room for units and ducts, and most buildings are new enough to take central cooling runs efficiently. The villas here need precise load calculation because the open spaces and high ceilings drive up cooling demand, and distributing ducts across multiple rooms calls for tight engineering design.
Al Amwaj lies in north Jeddah, a district of modern villas and spacious residential blocks with advanced architectural footprints.
Most new villas and blocks here are designed from the start for central AC, with dedicated spaces for outdoor units and duct runs.
The AC setup in Al Amwaj
- 1
Ducted central system distributed across floors
New Al Amwaj villas support central ducted cooling covering all floors and rooms efficiently from a single outdoor unit.
- 2
Outdoor unit on roof or side yard
The ample outdoor space in Al Amwaj allows the outdoor unit to sit on the roof or side yard away from neighbouring properties.
- 3
Central thermostat control system
Central AC benefits from a single thermostat in a strategic location across the villa or building to control temperature throughout all rooms.
Before the visit
Before our visit in Al Amwaj
- 1
Confirm roof access for the outdoor unit
If the outdoor unit will sit on the roof, ensure the roof is safe, accessible and able to bear the unit's weight without structural issues.
- 2
Mark duct routes and wall openings
Tell us which rooms you want cooled and where existing ventilation openings or duct routes are, to streamline the design and minimise alteration.
- 3
Verify available electrical circuits
Ask your electrician or contractor about the panel's capacity and whether a dedicated circuit is available near the outdoor unit location.
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FAQ
Questions about Central AC installation
How do you decide the right unit size for my villa?
We calculate the thermal load for each zone based on its area, ceiling height, number of external openings, orientation and how it will be used. In Jeddah the sun's effect on west-facing facades is significant, and high humidity goes into the calculation. We choose the unit size after this calculation, not before.
Do you make the ducts yourselves or buy them ready-made?
We fabricate round and rectangular ducts in our own workshop from G90 galvanised sheet or aluminium sheet depending on what the project needs. This lets us cut ducts to the exact site dimensions and fit them tightly, avoiding ill-fitting sections that leak air and raise electricity consumption.
What if the copper run to an outdoor unit is very long?
We use Mueller copper in runs of up to 30 metres without welded joints, which reduces potential leak points. If a run exceeds that, the survey determines whether the outdoor unit position needs rethinking or whether the refrigerant charge needs adjustment according to the type shown on the unit's nameplate.
Can each floor of the villa run on its own?
Yes, and it is settled at the design stage. Each floor can have its own unit, or the network can be split into zones with dampers and a thermostat in each, so you do not cool the whole upper floor while the family sits in the majlis. We recommend the right option after the load calculation.
Do the outdoor units need a special base on the roof?
Yes, and the roof surface determines what kind of base is needed. For villas we fabricate a raised steel frame that keeps the unit clear of pooled rainwater and allows airflow beneath it. The exact height and angle depend on the roof pitch and the condensate drain position, which the site survey establishes. The aim is to keep the unit level and to prevent vibration movement during operation.
How do you calculate cooling loads for the large villas here?
We assess each villa's floor area, room count, windows, sun exposure and insulation, then calculate the load in detail to select a unit that neither wastes energy nor undershoots cooling.
The ducts run through walls, do you have access issues?
Al Amwaj is new, so most villas and blocks are designed to route cooling ducts easily, but we visit first to confirm the best duct path and ensure it does not clash with wiring or other pipes.
The heat here is intense, does it affect unit selection?
Yes, peak summer heat in Al Amwaj raises the load on the outdoor unit, so we select units with sufficient capacity and robust cooling even at extreme temperatures.
What electrical capacity is needed for the outdoor unit?
It depends on the unit's capacity, but most new villas here have adequate electrical panels. We check the dedicated circuit and wiring before installation and ask for a circuit upgrade if needed.
