Design before you buy
HVAC design in Al Nur
HVAC design in Al Nur starts with calculating the heat load in each room, then selecting the right unit type and laying out the ductwork before you buy equipment. This keeps cooling even across all spaces and avoids wasting energy.
- 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 Nur has modern villas and residential apartment blocks of varying sizes, with east and west façades taking direct sun during peak hours. The design here must account for high heat load from large windows and sun-exposed walls, and balance the number of indoor units against a single outdoor unit's capacity to avoid overloading.
Al Nur is in north Jeddah, a relatively modern residential area mixing villas and apartment blocks with large sun-facing windows.
Most villas and blocks in Al Nur need either a multi-split system or a simple central unit, depending on the floor plan and architectural design.
The AC setup in Al Nur
- 1
Multi-split system for the villas
Modern Al Nur villas often need two or three indoor units linked to one outdoor unit, to spread cooling evenly across floors and wings.
- 2
Horizontal central system for smaller blocks
Smaller residential blocks in Al Nur may benefit from a simple central system with one outdoor unit and an air handler in the ceiling or walls.
- 3
Window units for servants' rooms and storage
Some villas and blocks need extra small units for staff quarters or storage, which can be fitted as small split units or window units if the design allows.
Before the visit
Before our visit in Al Nur
- 1
Bring the villa's floor plan or sketch
Bring an architectural drawing or even a simple sketch of the villa showing room dimensions, windows and doors so we can calculate the heat load accurately.
- 2
Tell us about occupancy and electrical appliances
Tell us how many people live in the villa or flat and what major appliances it has (kitchen, ovens, lighting), as these affect the heat load calculation.
- 3
Confirm roof and attic access for outdoor unit
Make sure the roof or outer wall can accommodate the outdoor unit and has enough clearance around it for proper airflow.
More districts for HVAC design
Other services in Al Nur
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 Al Nur villa has large south-facing windows, how do you calculate the heat load?
We measure each window's size and direction, the insulation materials, and add the effects of furnishings, lighting and expected occupancy, then select units with enough capacity to handle that load.
My Al Nur apartment block, is one split system enough or do we need central?
It depends on the number of units in the block, the size of each one and your budget, so we visit the site, calculate the total load and suggest the most cost-effective system.
The sun beats down on my villa's west wall, does that change the AC unit size?
Yes, walls and windows with direct sun exposure significantly raise the heat load, so we select higher-capacity units or suggest exterior shading to reduce the demand.
My apartment has very high ceilings, how does that change the design?
High ceilings increase the air volume that needs conditioning, so we raise the unit capacities or add extra units depending on the total floor area and layout.
