Chiller and AHU installation
Chiller & AHU installation in Al Mulaisa
In Al Mulaisa, south Jeddah, chiller and AHU installation in large residential and hotel buildings demands precision. Alrabih's team installs units on vibration-isolated bases, fully insulates the chilled-water pipework, and runs a complete commissioning test before handover.
- Vibration isolation
- Aluminium cladding
- Full commissioning
Clients We're Proud to Serve
Organisations and companies that trusted Alrabih with their projects.
When you need this installation
- 1
A new commercial or government building
The building is ready but the central cooling plant is not yet installed. You need a team to lift the chiller to the roof, prepare the bases and run chilled water pipework to AHUs on every floor.
- 2
An existing unit vibrates and makes noise
Constant vibration loosens pipe joints and fatigues mechanical components. If the unit is not sitting on proper vibration isolators, that is corrected during reinstallation; the site survey determines which isolator type is needed.
- 3
Extending an existing building
Adding floors or new areas means extra AHUs and extending the chilled water network. We connect the extension to the existing plant after verifying the current chiller capacity, which the site study determines.
Who it's for
Building a hospital or hotel that needs a central cooling plant
We visit the site before the building is complete to plan pipe routes and the plant room, then lift the chiller, mount AHUs on every floor and commission the full system.
Ask on WhatsAppReplaced an old chiller but connections do not match
We survey the new chiller and existing pipework, fabricate any transition pieces needed in our workshop, then reconnect and pressure-test the network before start-up.
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What the installation covers
- Chiller lifted onto isolated base
- Chilled pipework run and insulated
- Aluminium cladding of pipework
- AHUs mounted and duct-connected
- Pressure test and commissioning
How we work
How we work
- 1
Site survey and design
We visit the site to measure the plant room or roof, check pipe and duct routes, and determine lifting requirements and the right vibration isolator type for the building.
- 2
Base preparation and lifting
We prepare the chiller and AHU bases, fix the vibration isolators, lift the units into final position and check they are level before any connections are made.
- 3
Pipework and ductwork
We run the chilled water pipes, insulate them and clad them in aluminium sheet to resist Jeddah's humid salty air, then connect each AHU to its duct network.
- 4
Pressure test and commissioning
We pressure-test the pipework to confirm there are no leaks, then run the full system, measure air conditions at each AHU and adjust dampers until the required air distribution is achieved.
Considered installation or a rushed one?
| Alrabih | The usual way | |
|---|---|---|
| Chiller base | Isolators matched to the site | Bolted straight to concrete |
| Pipe insulation | Full insulation with aluminium cladding | Partial or left bare |
| Pipe test | Pressure test before start-up | Started without testing |
| Air balancing | Measured and dampers adjusted | Unbalanced airflow |
| Transition pieces | Fabricated in our own workshop | Improvised or ill-fitting |
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 Mulaisa has tall residential blocks, hotels and large commercial centres that need powerful central cooling systems. Cold-water pipework runs through multiple floors and suspended ceilings, and the high coastal humidity makes full insulation essential to prevent condensation on ceilings and walls. Chiller installation on the roof calls for careful vibration calculation to avoid long-term damage to joints and connections.
Al Mulaisa sits in south Jeddah, a modern urban zone of tall residential, hotel and commercial blocks.
Most tall buildings here use central cooling systems with a chiller and distributed AHUs across the floors.
The AC setup in Al Mulaisa
- 1
Central chiller with distributed AHU units
Tall residential buildings in Al Mulaisa rely on one or two chillers on the ground floor or roof, with AHU units on each floor.
- 2
Fully insulated and protected cold-water pipework
Cold-water pipes run vertically and horizontally through suspended ceilings and need full insulation and aluminium cladding to prevent condensation and corrosion in the coastal climate.
- 3
Multiple cooling units for very large buildings
Large hotels and commercial centres may need more than one chiller and several AHU units to distribute the cooling load evenly across all spaces.
Before the visit
Before our visit in Al Mulaisa
- 1
Verify roof and stairway capacity for chiller weight
Before the visit, confirm that the roof and main stairway or lift can safely support the chiller and equipment weight from ground to roof.
- 2
Map out pipe routes and ducts across all floors
Meet with building management or the architect to map out the cold-water pipe routes, AHU locations and duct paths on each floor before work begins.
- 3
Clear spaces for the chiller, AHUs and equipment
Ensure adequate clear space on the roof for the chiller and in plant rooms for AHU units, removing any obstacles that might delay installation or testing.
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FAQ
Questions about Chiller & AHU installation
How is the chiller unit lifted to the roof?
The method depends on the chiller weight, the building height and the space available around the site. The survey determines whether a crane or other equipment is used, and we verify that the roof structure can carry the load before setting the unit on its base.
Why do chilled water pipes need aluminium cladding in Jeddah?
Chilled water pipes carry cold water through hot, humid, salty air. Without external protection, insulation deteriorates from moisture and salt and loses effectiveness. Aluminium cladding protects the insulation from outdoor air on rooftops and the humid interior air found in coastal buildings like those in Jeddah.
Can you connect AHUs to an existing duct network?
Yes, if the existing ducts are in good condition and match the new unit's connections. At the survey we check the duct opening sizes, the duct condition and the plenum arrangement, and confirm whether part of the network needs adjustment or transition pieces need to be fabricated in our workshop.
What does system commissioning involve?
After the pipe pressure test we run the chiller and AHUs, measuring air temperature and pressure at each unit's outlets. We adjust dampers and valves to achieve the designed air and water flow to every zone in the building, and record the final readings before handover.
What is the difference between placing the chiller on concrete inertia bases and on rubber anti-vibration mounts?
A concrete inertia base adds mass that dampens the chiller's own vibration and holds the unit steady when the compressor starts. Rubber anti-vibration mounts interrupt the path of vibration before it reaches the roof slab. Whether to use one approach or both depends on the site survey, which takes into account the roof structure, the size of the unit and the building design.
My tall residential building needs a new chiller, what size should I install?
The chiller size depends on the number of flats and the heat load on each floor, which requires a detailed site survey to determine the required capacity before purchase.
The chiller will go on the roof, will access and equipment handling be an issue?
The stairway or lift must handle the weight, and clear roof space is needed; we coordinate with building management beforehand to ensure safe access and delivery.
The building is close to the sea with very high humidity, will the pipework corrode?
Coastal humidity raises the risk of corrosion and condensation on the pipes, so we clean, fully insulate and aluminium-clad the pipework with high-grade materials to ensure a long lifespan.
How do you confirm the chiller and AHUs run at full efficiency after installation?
After full installation, we run a complete commissioning test to measure temperatures, pressures and flow rates, confirming all pipework is properly insulated and connected before final handover.
