Design before you buy

HVAC design in Al Fanar

In Al Fanar, far north Jeddah, HVAC design must account for intense heat, coastal winds and widely spaced modern villas. Alrabih calculates heat load precisely and selects the system before quotation.

Call nowWhatsApp
  • Accurate heat loads
  • System selection
  • Duct drawings

Clients We're Proud to Serve

Organisations and companies that trusted Alrabih with their projects.

  • Saudi Aramco
  • Ministry of Energy
  • Royal Saudi Land Forces
  • Royal Saudi Naval Forces
  • Al Baik
  • Centro Hotels by Rotana
  • King Abdullah Economic City
  • First Mills
  • Juffali
  • eXtra
  • Dr. Soliman Fakeeh Medical Center
  • Alesayi Motors
  • Abu Zaid
  • Water Desalination
  • Attieh Steel
  • SSCO
  • Creet
  • Emad Rizq
  • Alfaneyah
  • Rawat Alam Al Tasmeem
  • IBI Magix Arabia — Construction Services
  • Midtown for Construction
  • Petra Engineering Industries Co.
  • Hyrmas
  • Batterjee Medical College
  • Advanced Horizons Contracting Company
  • D.Metals
  • Benchbox — Masters of Space
  • Sadafco
  • Umm Al-Qura University
  • Saudi Arabian Drug Store (SADS)
  • Foamco
  • Ahmad A. R. Bin Afif Industries Co. (Sandwich Panel Factory)
  • Namariq
  • ALS

Who needs a considered design?

  1. 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. 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. 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 WhatsApp

  • Running 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
Request a quote

How we work

How we work

  1. 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. 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. 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. 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?

AlrabihThe usual way
Unit sizeBased on actual loadGuessed or oversized
Airflow distributionDrawing that achieves even flowDiffusers placed at random
Co-ordinationDrawings before fit-outCostly changes later
System typeSuited to building and budgetWhatever the shop suggests
Humidity and salt airAccounted for in equipment choiceDiscovered after installation

Everything your AC needs, from one team

From system design and duct fabrication to installation, commissioning and maintenance.

Some of our work

Ductwork, rooftop units and diffusers, from work we've completed in Jeddah.

  • Galvanized rectangular duct trunk with branch takeoffs and round diffusers, hung from a black ceiling, a Carrier unit visible behind — interior finishing stage.
  • Round diffusers and a spiral duct trunk in a tiled stairwell service shaft.
  • Rooftop ductwork and an exhaust fan, with Jeddah buildings in the background.
  • Rooftop packaged AC units with rectangular duct transitions, city buildings behind.
  • Insulated rooftop duct run beside a packaged unit, a warehouse roof in the background.
  • A grid of round diffusers in an open-plan office ceiling, mid-construction.
  • An insulated rooftop duct elbow, against a mountainous backdrop.
  • Large insulated ductwork running along a factory ceiling, with workers visible below.
  • A yellow round diffuser mid-installation, with spiral duct and a suspended ceiling grid.
  • Duct insulation wrap in progress on a construction site, bare duct still exposed.
  • A black-painted duct trunk with round diffusers and track lighting, in a finished retail interior.
  • An indoor AHU unit connected to round ductwork in a mechanical plant room, exposed concrete ceiling.
Similar project? Send us the details

Customer reviews

What our customers say

4.8

From 10 Google reviews

  • 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”

Read every review on Google

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 review

Service 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.

Map of Jeddah by sector, with Alrabih's base in Al Aziziyah
Don't see your district?Message us. We most likely cover it.

What sets this district apart

Al Fanar is a relatively new residential zone of spacious, well-spaced villas and wide open streets, away from dense building. These villas have ample roofs and outdoor space, offering high flexibility in system choice and outdoor unit placement. Coastal winds and intense summer heat require precise heat load calculation, especially with large glazed windows and open-facing designs.

Al Fanar lies at far north Jeddah, a modern zone of spacious, well-separated villas in open urban style.

Most Al Fanar villas use central AC or multi-head split systems, and ample outdoor space allows ideal positioning of outdoor units.

The AC setup in Al Fanar

  1. 1

    Central AC for large villas

    Large Al Fanar villas benefit from unified central systems covering all rooms with balanced heat and single control.

  2. 2

    Multi-head split systems

    Some villas choose multi-head splits with different indoor units per villa wing for independent control and flexibility.

  3. 3

    Outdoor units on spacious roofs

    Spacious roofs and large outdoor voids allow ideal positioning of outdoor units with ample ventilation and easy maintenance.

Before the visit

Before our visit in Al Fanar

  1. 1

    Measure villa and roof layout

    Measure the complete villa, roofs and outdoor spaces, noting window directions and external exposures.

  2. 2

    Identify available ductwork routes

    Identify ceiling voids and wall cavities suitable for routing ductwork and pipes without affecting the structure.

  3. 3

    Confirm outdoor unit locations and power runs

    Select safe spots on roofs or walls for outdoor units, confirm electrical distribution is nearby and utilities are available.

More districts for HVAC design

Other services in Al Fanar

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 Fanar villa is large with very big windows, how do we design its HVAC?

We calculate heat load accounting for large windows and intense solar radiation in summer, then choose a central or multi-split system with ample capacity.

Do coastal winds from the sea affect HVAC performance?

Yes, we account for winds in heat load and loss calculations, and advise positioning the outdoor unit away from direct wind streams.

We have extensive outdoor space, where safely do we place outdoor units?

We draw a plan leveraging ample roofs and exterior walls, ensuring adequate airflow around units and easy maintenance access.

My villa is new construction, should we design AC before finishing the build?

Yes, early design allows us to run ductwork and pipes through walls and ceilings, saving money and time whilst improving the final look.

The Jeddah corniche in cool weather

Start with the right design

WhatsApp your building drawings or site photos, or call us to arrange a survey, Saturday to Thursday from eight in the morning to eight in the evening.

Call nowWhatsApp
CallWhatsApp