Design before you buy
HVAC design in Al Murooj
HVAC design in Al Murooj must account for far-north Jeddah's relatively cooler climate and high winds that affect unit efficiency. Alrabih calculates the heat load while factoring in wind speed and local climate conditions before selecting the system type and 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
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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 Murooj is a modern far-north district with mid and high-rise residential blocks and shopping complexes, buildings spaced reasonably but with wide landscaping between them. The area is exposed to strong northern winds especially in summer, which affects outdoor unit placement and its ability to withstand dynamic pressure. Designing the system here requires slightly lower heat load calculations than southern zones due to cooler temperatures, but units must be protected from the strong winds.
Al Murooj sits in far-north Jeddah, a modern growth area with tall residential blocks and shopping complexes exposed to strong seasonal northern winds.
Most Al Murooj buildings are tall residential blocks needing central or semi-central systems, with outdoor units usually mounted on high roofs to expose them to prevailing winds.
The AC setup in Al Murooj
- 1
Central system for tall residential blocks
Tall residential blocks in Al Murooj need a high-capacity central system that pushes cooled air through ducts distributed evenly across all floors.
- 2
Protected outdoor unit mounting on rooftops
Outdoor units are mounted on tall roofs with robust brackets and wind-resistant bracing to withstand seasonal north wind pressure.
- 3
Semi-central systems for shopping complexes
Shopping complexes in Al Murooj may use semi-central systems with multiple outdoor units to spread the load and simplify maintenance.
Before the visit
Before our visit in Al Murooj
- 1
Identify roof access and high points
Tell us about roof access, its height and any obstacles like telecom masts or water tanks that might affect outdoor unit placement.
- 2
Provide the block or complex layout
Approved drawings showing flat or shop count and floor count will speed up heat load calculation and system selection.
- 3
Check the electrical supply capacity
Powerful central AC systems need high-capacity three-phase power supply, so confirm this is available in the building before design starts.
More districts for HVAC design
Other services in Al Murooj
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 winds here are very strong, how does that affect choosing outdoor units?
We select units with robust construction and secure roof mounting, and recommend additional brackets or reinforcement to withstand the dynamic pressure of strong north winds.
The climate here is cooler than south Jeddah, does that reduce the unit capacity needed?
Yes, Al Murooj's relatively cooler temperatures mean slightly lower heat load, so you may need marginally smaller units than the same space in other areas, but we still factor in solar exposure and ventilation.
The blocks here are very tall, does that need a different AC system?
Yes, tall Al Murooj blocks need a powerful central system or multi-stage semi-central system to push cooled air to upper floors without pressure loss.
Does high humidity from being near the sea affect the design?
Yes, high humidity increases the dehumidification load, so we select units with higher drying capacity and may recommend an additional dehumidifier in severe cases.
