Design before you buy
HVAC design in Al Sahil
In Al Sahil, south Jeddah, designing AC for modern villas and residential towers requires precise heat-load calculation because direct sun exposure and coastal proximity increase cooling demand. Alrabih's team measures each space and selects the right system 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.
Ask on WhatsApp
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
Request this serviceDuct installation
Request this serviceCentral AC installation
Request this serviceDuct fabrication
Request this serviceCold room installation
Request this serviceElectro-mechanical works
Request this serviceChiller & AHU installation
Request this serviceHVAC design
Request this serviceAC repair & faults
Request this serviceAC cleaning
Request this serviceRefrigerant charging
Request this serviceCentral AC maintenance
Request this serviceChiller maintenance
Request this serviceAC removal & refitting
Request this serviceDuct cleaning & sanitising
Request this serviceAC servicing by brand
Request this serviceOperation & maintenance contracts
Request this serviceAHU maintenance
Request this serviceFridge & freezer service
Request this serviceCold rooms
Request this serviceDisplay fridges & chillers
Request this serviceFactory HVAC
Request this serviceWarehouse HVAC
Request this serviceVilla & home HVAC
Request this serviceHotel HVAC
Request this serviceSchool HVAC
Request this serviceHospital HVAC
Request this serviceMosque HVAC
Request this serviceMall & retail HVAC
Request this serviceRestaurant & cafe HVAC
Request this service
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 Sahil is a relatively modern district of spacious villas and residential towers, most with large glass facades opening onto the sea. This means higher heat load than inland neighbourhoods, especially on the south and west sides where the sun bears down all day. Proper system design needs precise measurement of glazing, floor area and ceiling height, and careful ducting layout to spread cooling evenly across rooms rather than relying on guesswork or randomly selected units.
Al Sahil is a modern coastal district south of Jeddah, comprising spacious villas and residential complexes with large glass frontages facing the sea.
Most modern villas and towers in Al Sahil need either central or multi-split AC systems because of the large floor areas and open-plan room layouts.
The AC setup in Al Sahil
- 1
Central AC system for large villas
Spacious villas in Al Sahil benefit from a single central system distributing air through ducts to all rooms, reducing outdoor units and energy use.
- 2
Multi-split units for residential towers
Residential towers in Al Sahil use separate split units per flat with the option to link them, providing control flexibility across dwellings.
- 3
Outdoor units on roof or rear wall
Because of large front glass facades, outdoor units are placed on the roof or rear wall to avoid direct sun heat absorption.
Before the visit
Before our visit in Al Sahil
- 1
Collect building plans and floor dimensions
Send us architectural drawings or clear photos of each floor before our visit so we can calculate areas and ceiling heights accurately.
- 2
Confirm outdoor and indoor unit locations
Confirm the roof or rear wall can hold outdoor units, and select preferred locations for indoor units in each room before we design.
- 3
Check main switchboard capacity
Verify your current main switchboard capacity before we visit, as the new system may need electrical upgrades.
More districts for HVAC design
Other services in Al Sahil
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 building faces the sea directly, how does that affect AC design?
Coastal proximity increases both heat load and humidity, so the design needs higher-capacity units and stronger airflow than inland buildings. We factor this into the heat-load calculation before purchase.
The villa has extensive south and west glazing, do we need larger units?
Direct south and west sun exposure significantly raises heat load, so we recommend precise measurement of glazing and floor area before sizing units. Poor design leaves some rooms cold and others hot.
The villa has open-plan floors, how do we distribute cooling evenly across them?
Even distribution requires precise layout of air ducts and pipe runs from the central unit, with flow speed and volume calculated for each zone based on its size and heat load.
Will the new system need extra electrical circuits?
This depends on the capacity of the selected units and the existing electrical load in the villa, so we review the distribution board before finalising the design.
