Design before you buy
HVAC design in Al Shara'i
HVAC design in Al Shara'i begins by studying the heat load for each room before any equipment investment. Alrabih's team calculates space needs based on area, glazing and occupant count, then selects the most suitable system.
- 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 Shara'i is a modern residential district with detached villas and medium-size apartment blocks on separate plots with relatively wide streets. This layout lets outdoor units sit in visible positions without negative impact, and the open space between buildings improves natural ventilation. Heat-load calculation must account for sun exposure, proximity to the street and seasonal wind patterns.
Al Shara'i is in north-east Jeddah, a modern residential area with regular street layout and villas and blocks on separate plots.
Most projects in Al Shara'i need balanced design choosing between distributed split systems or smaller central systems depending on building size and budget.
The AC setup in Al Shara'i
- 1
Distributed split system across floors and spaces
Villas and blocks in Al Shara'i typically use multiple splits distributed by floor and room count for better efficiency.
- 2
Small central system for smaller blocks and spacious flats
Some smaller blocks and large flats may suit a simple central system rather than several separate splits.
- 3
Independent splits per flat in residential blocks
Most residential blocks in Al Shara'i use independent splits per flat for ease of maintenance and individual control.
Before the visit
Before our visit in Al Shara'i
- 1
Prepare building plan with measurements
Bring the architectural plan or sketch showing room layout, doors and windows, marking which get direct sun.
- 2
List priority spaces for cooling
Specify which rooms need primary cooling (bedrooms and living areas) and secondary spaces to allocate budget wisely.
- 3
Choose suitable exterior walls for units
Survey exterior walls and identify available mounting spots away from main windows and entrances.
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 streets in Al Shara'i are wide, does that affect outdoor unit placement?
Actually, wide streets give more flexibility in mounting units on front or side walls without ventilation constraints, reducing copper run length.
Does natural ventilation between buildings reduce the AC capacity needed?
Natural ventilation helps but does not change the fundamental heat load. We calculate based on worst-case conditions (peak summer) and do not rely solely on seasonal winds.
The building gets sun from east and west, how do you distribute units?
We calculate heat load separately for east-facing and west-facing sides, and may choose units of different capacities or more than one unit per aspect.
How many copper lines will I need from outdoor to indoor units?
The number and size of lines depends on unit type, capacity and distance between them. We draw the layout precisely before you buy so we know the exact run and diameter needed.
