Design before you buy
HVAC design in Al Ruhaili
In Al Ruhaili, north-east Jeddah, modern residential complexes spread across multi-storey apartments and mixed commercial buildings, each unit needing its own design. We calculate each flat's needs based on its position in the building and sun exposure before choosing the AC.
- 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 fabrication
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Request this serviceDuct cleaning & sanitising
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Request this serviceAHU maintenance
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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 Ruhaili's apartment blocks are newer and standardised in design, but each unit's position differs by floor and sun-facing aspect. Upper-floor flats get more heat than lower ones, and south and west-facing units get longer direct sun. This means one flat's AC unit does not suit a sixth-floor flat. Proper design calculates every variable and selects the exact-capacity split, saving you from an unsuitable unit later.
Al Ruhaili in north-east Jeddah is marked by contemporary multi-storey residential complexes with standardised designs.
Most flats in Al Ruhaili choose a single split unit per unit due to limited space and shared ducting between floors.
The AC setup in Al Ruhaili
- 1
One split unit per flat
Newer flats in Al Ruhaili are compact, relying on one split serving most spaces from the living room and bedrooms.
- 2
Window units in some older flats
Some older flats in the complex may still use window units or older split systems needing replacement.
- 3
Outdoor units on balconies or external walls
Outdoor units are usually mounted on flat balconies or the building's external walls.
Before the visit
Before our visit in Al Ruhaili
- 1
Bring proof of flat size and location
Flat size, floor number and which direction it faces help us calculate the heat load accurately.
- 2
Ensure access to the balcony and external wall
We need to see the balcony and external walls to locate the outdoor unit correctly.
- 3
Check building management rules for installation
Some residential complexes have rules about outdoor unit placement. Confirm these before the visit.
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.
My flat is on the fifth floor, does a ground-floor unit fit it?
No, upper floors gain more heat from sun exposure on multiple sides. We calculate each floor's needs separately and select the right capacity for it.
My flat's walls face west, does this affect the AC?
Yes, west-facing walls take intense direct sun in the afternoon. We factor the flat's orientation into the heat-load calculation precisely.
Does moisture in new construction affect the AC design?
Yes, excess moisture in new flats raises dehumidification needs. We select a unit with enough cooling capacity to remove that moisture in the first year or two.
My flat is small, do I need a high-capacity unit?
Not necessarily. A small west-facing flat may need more capacity than a larger east-facing one. We calculate on actual heat load, not floor area alone.
