Design before you buy
HVAC design in Al Amwaj
In Al Amwaj, north Jeddah, designing AC systems for modern villas and residential towers calls for careful study of large open spaces and high sun exposure. Alrabih calculates the cooling load for each room and selects the right system type before you buy any 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
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Request this serviceDuct cleaning & sanitising
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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's buildings are relatively modern, with spacious villas and residential towers featuring large flats and big windows facing the sun all day, especially on the north and west facades. This building type needs a design that balances strong cooling for large sun-exposed spaces, even air distribution across multiple rooms, and electrical efficiency. Correct heat load calculation prevents oversized or undersized units being bought.
Al Amwaj sits in modern north Jeddah, a district of spacious villas and gleaming residential towers with open spaces and high sun exposure.
Most villas and towers here use multi-head split systems or central ducted systems to distribute cooling across large and numerous spaces.
The AC setup in Al Amwaj
- 1
Multi-head split systems
For large villas and towers here, we recommend multi-head split systems per floor or zone to achieve even cooling and independent control.
- 2
Central ducted systems with concealed ductwork
Modern residential towers often accommodate concealed ductwork in suspended ceilings or walls, providing a clean look and efficient distribution.
- 3
Outdoor units on rooftops or wide balconies
The spacious outdoor areas and available rooftops in Al Amwaj allow outdoor units to be mounted easily away from windows and façade design.
Before the visit
Before our visit in Al Amwaj
- 1
Prepare a sketch or floor plan of the villa or flat
Bring a floor plan showing window and door locations, entry points, kitchen and main rooms.
- 2
Identify which walls face the sun
Tell us which walls get intense sun all day or at specific times (east, west, south).
- 3
Choose your preferred location for outdoor units
Say whether you prefer units on the roof, balcony or exterior wall, and ensure maintenance access is feasible.
More districts for HVAC design
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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.
My villa is very large, does your design ensure even cooling in every room?
Yes, we calculate the cooling load for each room separately based on its area, windows and sun exposure, then select the unit count and capacity to ensure even distribution.
Al Amwaj has large outdoor spaces, where do you recommend placing the outdoor units?
In the design we identify the best placement for outdoor units based on the villa or tower layout, accounting for copper run length and maintenance access.
The sun is intense on the west-facing walls here, does that change the design?
Yes, high sun exposure on west and north facades increases the required cooling load, so we raise unit capacity or add extra units in those areas.
Does your design account for electricity costs over time?
We select energy-efficient systems and capacities based on actual space needs, and never oversize units which wastes electricity.
