Design before you buy
HVAC design in Al Ajwad
In Al Ajwad, east Jeddah, where modern residential buildings and commercial projects spread out, design starts by calculating heat load for each residential or commercial unit separately. Alrabih's team reviews the plan and electrical distribution, then selects the right system and draws precise layouts before any equipment purchase.
- 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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Request this serviceAHU 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 Ajwad is a rapidly growing modern area with new residential blocks and mixed commercial projects. Buildings here are usually well-insulated with modern electrical connections. Most flats and shops need separate units per residential or commercial space, requiring careful heat load assessment and electrical layout reading. Design accounts for the fact that new residential blocks prefer independent units for easy maintenance and separate metering.
Al Ajwad is a modern, fast-growing area in east Jeddah with new residential blocks and mixed commercial projects.
Most new buildings in Al Ajwad are designed for separate units per flat or shop, each with its own meter and independent AC.
The AC setup in Al Ajwad
- 1
Independent split unit per residential flat
The most common solution in Al Ajwad, each flat has one or more indoor units with a single outdoor unit and independent metering.
- 2
Dedicated unit per commercial shop
Shops, restaurants and offices need separate powerful units, sized for floor area, equipment and expected customer and staff numbers.
- 3
Shared system for common areas
Building corridors, lobbies and common areas may use a separate shared system, with costs divided among residents.
Before the visit
Before our visit in Al Ajwad
- 1
Confirm unit type: residential or commercial
Tell us if your unit is a residential flat, commercial shop or office, as heat load and required capacity differ completely.
- 2
Bring the unit plan with dimensions and windows
Send your unit's plan (flat or shop) showing dimensions, windows, doors and interior layout so we can calculate load accurately.
- 3
Identify available outdoor unit location
Identify where the outdoor unit can be placed: on the balcony, roof, or building's external wall, ensuring adequate space and ventilation.
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 flat is new in an Al Ajwad building, is AC separate for each flat?
Yes, in most modern buildings here each flat has its own separate AC unit and meter. We design your system based on your flat's area, windows and exposure.
The building is new with modern wiring, does this ease the design?
Greatly. Modern wiring offers flexibility in capacity and system choice, and good insulation in new buildings reduces expected heat load. We design to take advantage of these benefits.
Al Ajwad is new and buildings are close, is there natural shade to reduce heat load?
Some areas have close buildings providing partial shade, but most new buildings are open with direct sun. We factor your specific site conditions into the design.
Our building has mixed commercial and residential units, do heat loads differ?
Yes, significantly. Commercial units like shops and restaurants typically have higher loads due to equipment, lighting and occupancy, while residential flats are lighter. We calculate each separately.
