Design before you buy
HVAC design in Harat Al Yemen
HVAC design in Harat Al Yemen addresses the architectural complexities of closely packed old buildings in Jeddah's historic downtown. Alrabih surveys dimensions, windows and solar exposure between tight blocks, then selects a system suited to small spaces and irregular heights.
- 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 fabrication
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Request this serviceDuct cleaning & sanitising
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Request this serviceAHU maintenance
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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
Harat Al Yemen is in Jeddah's historic downtown, with very old buildings tightly packed around narrow alleys, small residential flats and shops on multiple floors with irregular heights. The very tight alleys limit large outdoor unit placement, close-packed buildings reduce natural ventilation raising heat load, and varying building heights make unified central AC impractical. System design here needs small, energy-efficient split units fitting tight spaces and relatively low ceilings.
Harat Al Yemen sits in Jeddah's historic downtown, an old tightly packed area around narrow alleys in the city centre.
Most buildings in Harat Al Yemen rely on separate split units per flat or shop, with outdoor units usually mounted on narrow facades or small balconies due to alley width.
The AC setup in Harat Al Yemen
- 1
Compact split unit per flat and shop
Most buildings in Harat Al Yemen use one compact split unit per flat or shop because the tight alleys cannot accommodate central systems.
- 2
Outdoor unit on narrow facade
Outdoor units are mounted on narrow wall facades or simple ledges with robust brackets rather than on roofs.
- 3
Window AC in some of the oldest buildings
Some of the oldest or smallest buildings may use window AC instead of split if external walls are weak or there is no outdoor unit space.
Before the visit
Before our visit in Harat Al Yemen
- 1
Identify safe outdoor unit location
Ensure there is a safe external wall or simple ledge where the unit can be mounted without endangering pedestrians or obstructing the narrow alley.
- 2
Check electrical wiring condition
Inspect the old electrical wiring in the flat or shop before the visit and tell us if it is weak or needs upgrade so we can plan a separate circuit.
- 3
Get neighbour and building agreement
Tight alleys and shared walls require coordination with neighbours and building management, especially if the outdoor unit will be on a shared facade.
More districts for HVAC design
Other services in Harat Al Yemen
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 alley is very tight, can you safely install an outdoor unit here?
Yes, we select compact outdoor units that fit narrow facades and small balconies, and use strong brackets anchored to walls or external barriers projecting minimally into the alley.
The building is very old with low ceilings, can you fit an indoor unit?
We select slim low-profile indoor units fitting low ceilings, and mount them on walls instead of ceilings where needed to save space.
Humidity is high and mould appears on walls, does AC solve this?
AC significantly reduces humidity and mould by dehumidifying the air, but good ventilation and brief window opening periods also help prevent moisture buildup.
Old electrical wiring may not handle AC, what do you recommend?
We inspect the existing wiring first; if it is weak we recommend upgrading the connection or running a separate dedicated circuit for the unit before installation.
