Design before you buy
HVAC design in Al Jamea
In Al Jamea, central Jeddah, HVAC design comes before purchase, not after. We calculate heat load for each room, select the right system type and draw layouts before you spend on equipment.
- 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 Jamea holds modern residential buildings, commercial centres and medium-sized office blocks, many with open-plan layouts or divided into multiple suites. This mix of uses means each part needs different cooling capacity, so one blanket unit will not work, and a design that ignores furniture placement and window exposure will leave some rooms hot and others over-cooled.
Al Jamea sits in central Jeddah, an area of mid-rise buildings with relatively modern design mixing office suites and commercial shops.
Most modern buildings in Al Jamea need central or multi-head split systems because of the open-plan design and larger floor areas.
The AC setup in Al Jamea
- 1
Central system for larger buildings
Larger modern buildings in Al Jamea typically benefit from a central ducted system with unified air distribution to all suites.
- 2
Multi-head split for divided spaces
Separate commercial shops and office suites in Al Jamea often need multi-head splits with one shared outdoor unit.
- 3
Optimal zoning for hot and cold areas
The design allocates higher cooling capacity to rooms with large windows and heavy equipment, less to corridors and storage areas.
Before the visit
Before our visit in Al Jamea
- 1
Obtain the building's architectural plans
Send us the architectural drawings and floor plans before we visit so we can pre-calculate loads accurately.
- 2
Confirm safe parking for the team
The busy roads around Al Jamea need advance agreement on team parking or internal lobby access.
- 3
Ensure electrical access and keys are ready
Ensure current electrical equipment is working and the team can access the electrical panel and all floors on the visit day.
More districts for HVAC design
Other services in Al Jamea
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.
How do you calculate heat load for open-plan spaces in Al Jamea?
We visit the building, measure the dimensions, windows and insulation, then calculate load for each zone based on occupancy, electrical equipment and sun exposure, even if the space is open-plan.
The roads around Al Jamea are busy, can your team access the building easily?
Yes, we coordinate with you before the visit to identify safe parking for the team and arrange building access via the main lobby.
The large windows in Al Jamea's buildings trap a lot of sun heat, how does that factor into your calculations?
We measure window area, orientation and sun exposure at different times, then add extra cooling capacity for rooms with large south and west-facing windows.
Modern buildings need strong electrical supply for AC, does this affect the design?
Yes, we check the electrical panel and wiring capacity before design, since a central system may need upgraded power supply or additional circuits.
