Design before you buy
HVAC design in Al Dahiyah
HVAC design in Al Dahiyah accounts for modern villas and large apartment blocks in this spacious developed district. We calculate heat load for each zone and select the right AC system before 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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Request this serviceDuct fabrication
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Request this serviceAC repair & faults
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Request this serviceAC removal & refitting
Request this serviceDuct cleaning & sanitising
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Request this serviceAHU maintenance
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Request this serviceRestaurant & cafe HVAC
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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 Dahiyah is a modern expanding district with large detached villas, developed apartment blocks, gardens, spacious exteriors and ordered separate streets. Adequate outdoor space and modern architectural design enable multiple choices between central AC or advanced multi-split. Correct design leverages this flexibility to choose the system balancing thermal comfort with energy efficiency.
Al Dahiyah lies in southern Jeddah with modern development, large detached villas, advanced apartment blocks and well-planned neighbourhoods.
Large villas and modern blocks in Al Dahiyah typically use central AC or multi-split systems rather than simple single units.
The AC setup in Al Dahiyah
- 1
Central AC with powerful unit and insulated ducts
Large Al Dahiyah villas and modern blocks typically use central AC with one powerful unit and insulated ducts in ceilings and walls.
- 2
Advanced multi-split with multiple outdoor units
Some modern Al Dahiyah villas prefer advanced multi-split with multiple outdoor units for independent temperature control per storey or wing.
- 3
Multi-split with one powerful outdoor unit
The mid-option combines multiple split indoor units with one large outdoor unit, suitable for medium villas and smaller blocks.
Before the visit
Before our visit in Al Dahiyah
- 1
Send complete plan and precise measurements
Send the full building plan with precise room dimensions, ceiling heights, window and door locations and all openings.
- 2
Mark preferences for indoor and outdoor unit placement
Mark your preferred locations for indoor and outdoor units on the villa or building plan before the visit.
- 3
Ensure roof and exterior access is safe
Verify the team can safely access roof, outdoor areas and interior spaces to assess all design options.
More districts for HVAC design
Other services in Al Dahiyah
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.
For a large Al Dahiyah villa, is central AC or multi-split better?
It depends on storey count, room number and architectural design. We calculate heat load and compare both options, and correct design saves energy and maintains comfort.
Al Dahiyah has spacious outdoor areas, does that simplify design?
Yes, ample outdoor space offers more options for outdoor unit placement and ducts, making design easier and more cost-effective to build.
How do I choose between central and multi-split based on budget?
Central AC is cheaper to run long-term, but higher upfront cost. Multi-split costs less to install but may consume more electricity. We provide the comparison in the design.
What heat-load factors apply to large Al Dahiyah villas?
We factor in each room's area, glazing, window direction toward sun, occupancy and electrical loads. We study all this and specify correct unit capacities and duct sizes.
