Design before you buy
HVAC design in Al Wadi
In Al Wadi, south Jeddah, where small and medium villas sit on regular plots, design begins by calculating heat load for each living area based on its size and sun exposure. Alrabih's team reviews the plan, selects the appropriate system type, then draws the complete layout before any equipment purchase.
- 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 Wadi's villas are smaller and denser than Al Sarawat, sitting on regular plots with moderate window ratios and moderate sun exposure. Most villas here need a relatively simple system, perhaps a dual-head split or a light central rig, without the need for large capacities. The design accounts for regular plots that ease duct distribution and natural airflow between villas that reduces system stress.
Al Wadi is a regular residential area in south Jeddah, with medium-sized villas on fairly equal plots.
Most Al Wadi villas need a split system with one outdoor unit feeding two or three indoor units at most.
The AC setup in Al Wadi
- 1
Dual-head split system
The most balanced system in Al Wadi, pairing one outdoor unit with two indoor units, suited to medium-sized villas.
- 2
Triple-head split system
For slightly larger villas or those wanting separate control between wings, we use three indoor units on a single outdoor line.
- 3
Lightweight central system with compact ducts
Where uniform distribution is preferred, we select a lightweight central system with compact ducts running through existing gaps, without major construction work.
Before the visit
Before our visit in Al Wadi
- 1
Bring the villa plan with basic dimensions
Send or bring a copy of your villa's plan showing rooms, main dimensions and window locations so we can calculate loads accurately.
- 2
Mark possible outdoor unit spots
Identify with us beforehand where the outdoor unit could go: roof, side wall or garden, ensuring enough space and ventilation.
- 3
Mention any building constraints
If there are constraints, such as restricted duct routes or protected zones, tell us before design so we account for them from the outset.
More districts for HVAC design
Other services in Al Wadi
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 villa is small to medium, do I need central or is split enough?
We review the plan, areas and windows, but small to medium Wadi villas typically need a dual or triple-head split, which is cheaper and easier to install and maintain.
Al Wadi is a regular area, does that make ducting easier?
Yes, regular plots and villas close to each other make duct planning simpler, reducing cost and complexity.
Does solar exposure in Al Wadi affect AC sizing?
Yes, but less severe than Al Sarawat. We account for windows and east-west facing walls, though heat loads are typically moderate in Al Wadi.
The outside space at my villa is tight, where can the outdoor unit go?
We inspect the site and find the best spot, whether on the roof, side wall or back corner, ensuring adequate clearance and airflow for the unit.
