Design before you buy
HVAC design in Al Murjan
HVAC design in Al Murjan starts by calculating the heat load for each room before any equipment is bought. Proper design ensures right-sized units and even cooling throughout your home or project.
- 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 Murjan's northern neighbourhoods feature modern villas with large floor plans and more rooms, requiring careful design of either central AC or multiple split units distributed strategically. High summer temperatures and the big glazed facades exposed to direct sun raise the heat load significantly, so each zone in the home needs precise calculation rather than guesswork about unit sizes.
Al Murjan lies in north Jeddah, a district of spacious modern villas with gardens and open architectural designs.
Most modern villas in Al Murjan use unified central AC systems or multi-zone split units distributed across multiple floors.
The AC setup in Al Murjan
- 1
Unified central AC system
Larger Al Murjan villas typically choose a single central system covering all floors through unified ducts and a smart thermostat that manages distribution.
- 2
Distributed multi-zone split units
Some villas prefer multiple separate split units per floor or room group, allowing independent control and potentially lower electricity consumption.
- 3
Custom design for high-heat zones
Rooms with large glass facades or direct sun exposure need stronger units or extra ducts, which the design specifies before construction begins.
Before the visit
Before our visit in Al Murjan
- 1
Gather the building or villa blueprints
Bring the complete architectural plans for the villa with room dimensions, ceiling heights, windows and door sizes, as these are essential for accurate calculation.
- 2
Identify available outdoor unit locations
Check where outdoor units can be mounted, roof, rear wall or garden, and ensure they remain easily accessible for maintenance later.
- 3
Clarify your smart control and comfort needs
Tell us if you want a smart thermostat, separate control per zone or a mobile app, as this affects the system type we design.
More districts for HVAC design
Other services in Al Murjan
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 large and has multiple floors, how do I ensure the AC reaches every corner?
Proper design calculates the load for each floor and room separately, then specifies the number and size of units and the duct runs needed for even distribution. We draw the layout before you buy anything.
My villa's big glass facades heat up the rooms a lot, does the design account for that?
Yes, we calculate direct sun exposure on every glazed wall and add it to the total heat load for that room. This affects the unit size and capacity needed.
How do modern villa construction methods affect central AC ducting?
Modern villas in Al Murjan typically accommodate ducting through walls and suspended ceilings easily, but duct diameters and locations must be calculated beforehand so they do not clash with the main structure or wiring.
If I am building the villa now, when should I commission the design?
Before starting the interior finishes or fixing suspended walls and ceilings, since the design specifies duct routes and outdoor unit placement. The earlier you commission it, the fewer changes later and the lower the cost.
