Design before you buy
HVAC design in Al Hazza'iyah
In Al Hazza'iyah, in north-east Jeddah, designing the AC system before buying equipment means units are correctly sized and ducts fit the newer buildings. We calculate the heat load for each room and choose the right system type before any spending.
- 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 cleaning & sanitising
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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 Hazza'iyah is a relatively newer neighbourhood of detached villas and spacious multi-storey homes with extensions, laid out more regularly than the old downtown. These buildings usually have open roofs and good space between them, but modern villas have many rooms and complex layouts that need a carefully distributed central system covering several zones.
Al Hazza'iyah lies in north-east Jeddah, an area of modern detached villas and multi-storey residential buildings with regular planning.
Most modern villas in Al Hazza'iyah use central AC systems with ducts distributed across all floors and internal wings.
The AC setup in Al Hazza'iyah
- 1
Central system with multiple zones
Multi-storey villas here benefit from one central system with a separate thermostat for each floor or wing.
- 2
Ducts concealed within walls and ceilings
Modern buildings in Al Hazza'iyah allow ducts to run within the building envelope without spoiling interior finishes.
- 3
One or more outdoor units on the roof
Open roofs provide space to mount the outdoor units away from occupied areas.
Before the visit
Before our visit in Al Hazza'iyah
- 1
Bring the building plan and interior layout
We need to see room dimensions, wall and window locations, and ceiling heights to calculate heat load accurately.
- 2
Identify preferred locations for indoor and outdoor units
Tell us where you want the indoor units in each room and where the outdoor unit can be placed on the roof before the visit.
- 3
Ensure access to roofs and internal spaces
Check that the roof is safe to stand on and work from, and that space exists between ceilings and walls to run ducts.
More districts for HVAC design
Other services in Al Hazza'iyah
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 new villa has many rooms, how many AC systems does it need?
It depends on the number of floors, wings and the distances between them. We calculate the heat load for each section and recommend either one central system with multiple zones or more than one system based on need.
Open roofs on villas increase heat, does that affect the design?
Yes, we factor in sun exposure on the roof and external walls in the heat-load calculation, because it increases cooling demand in the upper rooms.
Does the outdoor unit's position on the roof affect system efficiency?
The unit's position affects the length of the refrigerant lines and electrical runs, which we account for in the design to minimize heat loss.
The humidity near the eastern areas here is high, does the system need special specs?
We select the coil and filter specs based on expected humidity and dust, and design the duct work to drain condensation efficiently.
