Design before you buy
HVAC design in Al Bayan
HVAC design in Al Bayan starts with calculating the heat load for each room based on its area, glazing and sun exposure. Alrabih's team selects the right system type and draws the layouts before any equipment is bought.
- 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 Bayan is a modern eastern district with spacious villas and apartment blocks featuring large windows and direct sun exposure from east and south. New buildings here need precise design because extensive glazing and openings increase the heat load, and larger spaces demand balanced air distribution across different rooms. Heat load calculations must account for peak hours, humidity and direct sun exposure in both morning and evening periods.
Al Bayan lies east of Jeddah and is built with modern residential blocks featuring large glass facades and open outdoor spaces.
Most new villas and apartment blocks in Al Bayan use central or multi-unit split systems to cover their large floor areas efficiently.
The AC setup in Al Bayan
- 1
Central system for large apartment blocks and villas
The spacious layouts in Al Bayan suit central systems with ducting distributed across floors and rooms.
- 2
Multi-unit split systems for balanced distribution
Many modern villas use one outdoor unit with multiple indoor units to cover different spaces efficiently.
- 3
Accounting for large glass facades
The design factors in the extra heat load from large glass areas and direct solar radiation on external walls.
Before the visit
Before our visit in Al Bayan
- 1
Bring the building plan and floor layouts
We need a copy of the engineering plan to measure spaces accurately and plan the pipe routes before design begins.
- 2
Identify possible outdoor unit locations
Tell us which roof or wall areas are available for the outdoor unit and the expected distance from indoor units.
- 3
Clarify each room's use and occupancy
Tell us how each space will be used and expected occupancy, as this affects the heat load calculation.
More districts for HVAC design
Other services in Al Bayan
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.
How do you calculate heat load for my new villa in Al Bayan?
We measure the floor area, glazing and sun exposure from each direction, calculating the load for each room individually based on its use and occupancy. The result determines the size of outdoor and indoor units and the copper run layout.
Villas in Al Bayan have lots of glass, does that change the design?
Yes, large glass areas significantly increase the heat load, particularly on east and south facades. The design accounts for this by increasing unit capacity and improving air distribution.
Does the design account for long summer hours and extreme heat in Al Bayan?
Yes, we calculate load based on the harshest summer conditions, including peak temperatures, humidity and direct solar radiation throughout the day.
How much copper pipe do we need to distribute cooling across multiple floors in an apartment block?
It depends on the number of units, the distance from outdoor to indoor units and the height between floors. The design specifies the pipe length and diameter to ensure balanced refrigerant flow to each unit.
