Design before you buy
HVAC design in Al Mawj
In Al Mawj, south Jeddah, HVAC design starts with calculating the heat load for each room before you buy any unit. We measure the space, glazing, occupancy and sun exposure, then choose the right system and draw the layouts before you invest.
- 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 Mawj holds modern villas and apartment blocks in relatively open areas with gardens and wide outdoor spaces. This building type calls for careful design because the large spaces, broad windows and direct sun exposure from multiple sides raise the thermal load. Sound design from the start avoids oversizing units and ensures even cooling throughout the villa or block.
Al Mawj sits in south-east Jeddah, a district of modern villas and new apartment blocks with open spaces and gardens.
Most new villas and blocks here need a central ducted system because the interior spaces are large and the storeys are multiple.
The AC setup in Al Mawj
- 1
Central ducted system
The large villas and blocks in Al Mawj need one or two central units with ducts distributed across floors because the interior spaces are wide.
- 2
Outdoor unit located away from the entry
Al Mawj's wide outdoor spaces allow for long copper runs, but this needs careful sizing and efficiency calculations.
- 3
Balanced design for multiple floors
Multi-storey villas need evenly distributed ducts across floors to avoid temperature swings between levels.
Before the visit
Before our visit in Al Mawj
- 1
Have the villa or block floor plan ready
Provide an architectural floor plan showing room dimensions, windows, doors and levels so the team can calculate the load accurately.
- 2
Select the outdoor unit location
Agree with the team on the best spot for the outdoor unit in the garden or on the roof, considering distance from the entry and shade.
- 3
Confirm roof or garden access for placement
Check that the roof or garden is safe for standing, installing the outdoor unit and running the necessary lines.
More districts for HVAC design
Other services in Al Mawj
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 large with many windows, how do I size the unit correctly?
Don't guess by eye, because large villas with broad windows need precise load calculations. We measure the area, glazing, sun exposure from each side and occupancy, then pick the right capacity before purchase.
My garden is wide and the outdoor unit would sit far from the entry, does the distance matter?
Yes, the length of the copper pipe run affects system efficiency. We account for the distance and capacity together in the design, and may recommend a larger unit if the run is long.
Al Mawj's hot sun hits my west and south windows, how does this change the design?
Direct sun from multiple sides significantly raises the thermal load. We factor this into the sizing and system selection for your villa or block.
For a central ducted system, what does running pipes and ducts through the villa cost?
The cost depends on the duct run length, outdoor unit location and electrical runs. Send a photo of the villa on WhatsApp, and we'll give you a full quote after the design.
