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Planning

Our Initial start with Our Clients will be Plumbing,  VRF & Ventilation/hvac Systems Design

Our offer

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We’re happy to offer a complimentary concept design as a starting point. As a courtesy to new clients, this initial design proposal is provided at no charge and will be included upon finalizing the contract

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We can provide an initial HVAC design including a basic cooling system schematic and preliminary equipment selection to assist you in identifying suitable manufacturers that align with your budget.

Examples: ​​

Al-Jubail Hospital / SA poject 

 Project Schematic

Equipment Schedule

Bill of Materials

Detailed Report

UK Projecs Schematics

Centralised VRF - water cooled

System Controls

Centralised VRF -air cooled

Plumbing system

Domestic and Waste-Vent

District cooling system 

(Future project)

To provide you with an accurate initial HVAC design and schematic, we'll need the architectural plan views or detailed information that includes:

Key Details to Share:

  1. Floor Plans (preferably in PDF, DWG, or image format):

    • Indicate room usage (e.g., office, server room, lab).

    • Include mechanical/electrical rooms, roof access, or chiller plant space.

  2. Ceiling Heights & Building Sections:

    • Helps with ductwork/piping layout and sizing.

  3. Heat-Generating Equipment or Areas:

    • Such as kitchens, server rooms, machinery, etc.

  4. Window Locations and Orientation:

    • Impacts cooling load due to solar gain.

  5. Preferred Equipment Location:

    • Rooftop, basement, external pad, etc.

  6. Any Special Requirements:

    • Noise limits, zoning restrictions, redundancy, energy efficiency targets (LEED, BREEAM, etc.)

Once you upload these or describe them in detail, I can:

  • Draft a basic schematic showing chillers, pumps, AHUs, piping loops, etc.

  • Suggest initial equipment selection (capacities, types, configurations).

  • Provide layout guidance for plant and major piping.​

ASHRAE & Cooling Tower Design Guidelines

  • Wet Bulb Temperature (WBT) is more critical than DBT for cooling towers, because cooling towers reject heat via evaporation, which is limited by the ambient WBT.

  • ASHRAE and CTI (Cooling Technology Institute) suggest designing for 0.4% to 1% occurrence values (i.e., conditions that occur 0.4% of the time in a year).

In desert or Gulf climates (like southern Iraq, eastern Saudi Arabia, Kuwait, UAE):

  • Design WBT: 30–32 °C

  • Design DBT: 48–52 °C

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Real-World Application Examples

Region Design WBT Design DBT

Central Europe 22–24 °C 30–35 °C

South Asia (India) 28– 30 °C 42–46 °C

Middle East (Iraq, KSA, UAE) 30–32 °C 48–52 °C​

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Important Design Considerations

  • Cooling tower approach temperature (how close it cools to ambient WBT) is typically 3–6 °C.

  • As WBT increases, tower performance declines unless tower size or water flow is increased.

  • High WBT may require larger towers, higher air flow, or hybrid/adiabatic cooling designs.

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CIBSE Guide A – Environmental Design (e.g., 2015 edition and updates)

CIBSE Percentile Design Conditions

CIBSE recommends using 2%, 1% or 0.4% percentile values for sizing cooling equipment:

  • 0.4% Summer Design Condition: For critical systems like cooling towers or process cooling.

  • For example, in a hot climate (Middle East or Iraq), this might translate to:

    • WBT: 30–32 °C

    • DBT: 48–52 °C

These conditions are used to ensure reliable cooling performance during extreme heatwaves, not just average summers.

Cooling Tower Design Based on CIBSE & Best Practice

SpecificationDesign Recommendation

WBT (Ambient) Use 0.4% WBT from local climate data

Approach Temp 3–6 °C (cooling tower outlet temp above WBT)

Tower Selection Margin Add 5–10% capacity buffer for safety

Humidity & AltitudeAccount for in performance correction

In Practice – Example for Basra (Iraq):

  • Design DBT: ~52 °C

  • Design WBT: ~32 °C

  • Tower Cold Water Temp Target: ~36–38 °C (if 4–6 °C approach is applied)

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