Design before you buy
HVAC design in Al Owaija
HVAC design in Al Owaija accounts for the dense residential landscape and the district's popular character. We calculate cooling needs precisely for each area and choose suitable systems before investing in equipment.
- Accurate heat loads
- System selection
- Duct drawings
Clients We're Proud to Serve
Organisations and companies that trusted Alrabih with their projects.
Who needs a considered design?
- 1
Owner planning a new build
Before walls and ceilings are finished you still have the chance to route ducts and place units correctly. Early design prevents costly surprises during fit-out and delivers rooms that cool evenly from the first day of operation.
- 2
Architect or contractor needing drawings
The project needs mechanical drawings to co-ordinate with the structure, electrical and plumbing trades. We produce duct layout drawings, equipment positions and installation heights in a format the site can use directly.
- 3
Existing building with uneven cooling
Some rooms stay hot even with the AC running while others are over-cooled. The cause is usually wrong airflow distribution or uncalculated capacity. A redesign finds the fault and defines what needs changing before any new purchase.
Who it's for
Building a villa and want design before fit-out
We calculate the heat load for every room in the villa and draw duct routes before ceilings are closed, so you avoid breaking the finished work later.
Ask on WhatsAppRunning a commercial building with hot rooms
We review the current airflow distribution and recalculate loads per space, then identify faults in the ducts or equipment and draw the required changes before any purchase.
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What the design covers
- Heat load per room
- Right system type selected
- Equipment from authorised brands
- Duct distribution layout drawings
- Equipment schedule for construction
How we work
How we work
- 1
Gather building data
We ask for the architectural drawings or visit the site to measure spaces and record glazing, orientation and internal loads from people, equipment and kitchens.
- 2
Calculate heat loads
We calculate the heat load for each space separately, accounting for Jeddah's intense sun, high humidity and exposed facades, so every unit is sized on real load not guesswork.
- 3
Select system and equipment
Based on loads and building type we choose between splits, ducted systems, central air and chiller, and specify equipment from Carrier, YORK, General, Midea, Gree and Smart Gold to suit the project.
- 4
Draw and deliver
We draw duct routes, unit positions, diffuser locations and installation heights, and deliver a complete equipment schedule ready for construction or tendering.
Calculated design or buying blind?
| Alrabih | The usual way | |
|---|---|---|
| Unit size | Based on actual load | Guessed or oversized |
| Airflow distribution | Drawing that achieves even flow | Diffusers placed at random |
| Co-ordination | Drawings before fit-out | Costly changes later |
| System type | Suited to building and budget | Whatever the shop suggests |
| Humidity and salt air | Accounted for in equipment choice | Discovered after installation |
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
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Request this serviceDuct fabrication
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Request this serviceAC repair & faults
Request this serviceAC cleaning
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Request this serviceAC removal & refitting
Request this serviceDuct cleaning & sanitising
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Request this serviceAHU maintenance
Request this serviceFridge & freezer service
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Request this serviceDisplay fridges & chillers
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Request this serviceMosque HVAC
Request this serviceMall & retail HVAC
Request this serviceRestaurant & 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 Owaija is a densely populated popular district in north-east Jeddah with medium-sized villas on small plots and high-density multi-storey apartment blocks. Buildings are constructed very close together, meaning very limited outdoor space for mounting AC units. The dense district also has narrow streets and few green spaces, raising local temperatures due to heat absorption from asphalt and buildings. Design here must be practical and flexible to work with space constraints and high heat load.
Al Owaija lies in north-east Jeddah with densely packed residential buildings mixing villas and apartment blocks very close together.
Most villas and blocks in Al Owaija use separate split units per residential unit because of limited shared outdoor space.
The AC setup in Al Owaija
- 1
Separate split unit per residential unit
Most villas and flats in Al Owaija use one separate split unit, with the indoor unit on an interior wall and the outdoor unit on the roof or facade.
- 2
Window units in very small flats
Some very small flats may use a single window unit instead of a split if the interior space is highly limited.
- 3
Compact split unit for tight spaces
Small flats and tight villas use compact split units with smaller size and directed airflow to handle limited spaces.
Before the visit
Before our visit in Al Owaija
- 1
Review available outdoor spaces
Check roofs, balconies and exterior corners for safe outdoor unit mounting without blocking passages or affecting neighbours.
- 2
Coordinate with neighbours in closely built structures
In very closely built structures, agree with neighbours on the outdoor unit location and copper run to avoid conflicts or disturbance.
- 3
Confirm electrical supply near the unit location
Check that electrical supply is available near the outdoor unit or roof location, as long runs may be difficult in dense districts.
More districts for HVAC design
Other services in Al Owaija
FAQ
Questions about HVAC design
When is a chiller more suitable than split units?
The decision depends on the building area, number of spaces and how it is used. In large commercial and hotel buildings a chiller gives flexible control and simplifies central maintenance. In apartments and smaller villas a split or ducted system usually fits better. The calculated heat load is what determines the right choice for your building.
How does a large glazed facade affect the design?
Large glazing exposed to Jeddah's sun raises the heat load noticeably, especially on west and north-west facades. We calculate solar gain through each facade separately, and this can change the unit type selected for that room or require extra diffusers to handle the higher load.
Can you design for an existing building with no architectural drawings?
Yes. When no drawings exist we visit the site and measure every space ourselves, recording facades, glazing and how each room is used. The survey takes longer than reviewing ready drawings, but the calculations still rest on real measurements rather than estimates, which is what makes the results reliable.
Does the design include diffuser types and dampers?
The drawings specify diffuser types, positions and sizes to match ceiling height and room shape, and show where dampers are needed to balance airflow to each zone. These details matter because a diffuser in the wrong place wastes a large part of the system capacity even when the units are correctly sized.
Does duct design differ between the ground floor and upper floors?
Yes. The top floor typically carries a higher heat load because the roof is directly exposed to the sun, which affects duct sizes and the number of diffusers needed on that level. We design each floor separately based on its own calculated load and show where dampers are needed to balance airflow between floors.
The gaps between villas are tiny, where do I put the outdoor unit?
The outdoor unit usually goes on the villa's roof or a high corner of the rear facade where it does not obstruct passage. We recommend very secure mounting since tight spaces allow no margin for movement.
The closely built structures around my house block the air, does this affect cooling?
Yes, it reduces airflow around the outdoor unit and raises its temperature. We select a unit with high efficiency in stagnant air and suggest regular cleaning of the outdoor unit from dust.
The district is very dense and very hot, can the system provide enough cooling?
We select a unit with higher-than-normal capacity to compensate for high heat load from surrounding asphalt and buildings. We also recommend reflective curtains and extra insulation for external walls.
The flat is small with very limited space, is a split unit enough?
Yes, a separate split unit is ideal for small flats with limited space. We select an appropriate size covering the whole flat without taking too much wall space.
