Design before you buy
HVAC design in Al Majd
HVAC design in Al Majd requires understanding the layout of modern apartment blocks and villas in the north-east and distributing heat load accurately across them. Alrabih's team measures each room, calculates its heat load, then selects units and plans the runs.
- 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 serviceElectro-mechanical works
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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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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 Majd is a developed district in the north-east with relatively modern apartment blocks and closely spaced villas with moderate greenery. Building stock here is newer than downtown but denser than other northern areas, so outdoor units may need horizontal placement as well as vertical, and ducts must navigate around load-bearing walls and structural columns.
Al Majd is in north-east Jeddah, a modern residential area of medium-rise apartment blocks and closely spaced villas with garden areas.
Most buildings in Al Majd use multi-split systems or partial central systems covering several rooms from one outdoor unit.
The AC setup in Al Majd
- 1
Multi-split with one central outdoor unit
Medium-sized apartment blocks and villas benefit from one outdoor unit connected to multiple indoor units across different rooms.
- 2
Partial central system for specific wings
Some larger blocks need a central system covering one residential wing, with a separate system for the other wing.
- 3
Concealed ceiling units in corridors
Corridors, common areas and entrances use small concealed ceiling units hidden in false ceilings.
Before the visit
Before our visit in Al Majd
- 1
Bring complete architectural drawings
We need drawings showing ceilings, load-bearing walls, column locations, balconies, roofs and gaps between buildings.
- 2
Tell us sun and wind directions
Tell us which side faces intense sun in morning or evening, and which directions bring humid winds.
- 3
Confirm roof and balcony access
Check that the roof and balconies are safe to access and move around, and tell us of any safety limits or building management conditions.
More districts for HVAC design
Other services in Al Majd
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 building is new with many load-bearing walls, how do you design the ducts?
We study the structural drawings and avoid load-bearing walls by routing ducts through false ceilings or non-structural walls.
Our villas are very closely spaced, where do we put the outdoor units?
We examine the gaps between villas and choose roofs or side balconies, or arrange multiple smaller units instead of one large one.
Narrow streets and single entrance for the block, does that affect design?
Yes. We ensure ducts run inside the building and the outdoor unit is accessible for maintenance without disturbing neighbours.
Do you account for intense summer heat on the roofs?
Yes, we choose wiring routes and outdoor unit locations that minimise extra heat absorption, and may suggest additional insulation or roof shading.
