Design before you buy
HVAC design in Al Rayyan
HVAC design in Al Rayyan, east Jeddah, calculates the heat load for each section of villas, hospitals and hotels based on usage and solar exposure. A properly designed system ensures even cooling and prevents energy waste.
- 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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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 Rayyan is a diverse area with luxury villas, residential blocks, office towers and medical and hotel complexes. Buildings here are modern and larger, with wide glass windows in towers and hotels. Design requires deep study of different usage patterns in each section, such as hotel rooms, clinics and offices, since each has a different heat load.
Al Rayyan lies in east Jeddah as an area of upscale residences, modern commercial and medical projects with multiple storeys.
Most towers, hotels and hospitals in Al Rayyan need powerful central HVAC systems with separate control units for each floor or section.
The AC setup in Al Rayyan
- 1
Multi-zone central system for towers and hotels
Hotel and commercial towers in Al Rayyan need a robust central system with separate control for each floor or section for comfort and efficiency.
- 2
Central HVAC for hospitals and medical complexes
Hospitals and clinics in Al Rayyan need a central system with high-grade air filtration and precise temperature control to protect patients and medical equipment.
- 3
Multi-head split units for large villas
Large luxury villas in Al Rayyan may choose multi-head split units over central systems for easier maintenance and space savings.
Before the visit
Before our visit in Al Rayyan
- 1
Prepare plans for each floor and intended use
Provide building plans for each floor with descriptions of use, such as hotel room count, clinic areas and offices, so we can calculate load precisely.
- 2
Check rooftop and mechanical spaces
Ensure a safe roof and adequate mechanical space for mounting the large outdoor unit and routing horizontal and vertical ducts.
- 3
Identify condensate drainage and main duct routes
Think through main duct routing paths and spaces between suspended ceilings, and where condensate will drain without damaging walls or floors.
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.
The hotel has multiple rooms with different loads, how do you design the system?
We study the occupancy pattern and ventilation needed for each room type, then select separate controls for each floor or block of rooms to save energy and ensure comfort.
The location faces east and absorbs sun all day, how do you calculate load for tall towers?
We calculate solar exposure on each tower face hour by hour, since east and west facades take far more solar heat than north and south.
Clinics and labs need tighter control than offices, how do you handle that?
We zone the system with separate temperature control, giving clinics and labs precision units while offices use simpler zones.
Lower floors may need less cooling than upper floors, does this affect the design?
Yes, we design capacity based on height and exposure per floor, with distributed ducts allowing airflow adjustment between levels.
