Our offer
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
We can provide an initial HVAC design including a basic cooling/heating system schematic and preliminary equipment selection to assist you in identifying suitable manufacturers that align with your budget.
In addition, an estimated EPC (Energy Performance Certificate) will be provided for your building.
To provide you with an accurate initial HVAC design, we'll need the architectural plan views, detailed information that includes:
Key Details to Share:
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Floor Plans in DWG format (preferably in DXF format):
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Indicate room usage (e.g., office, server room, lab).
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Include mechanical/electrical rooms, roof access, or chiller plant space.
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Ceiling Heights & Building Sections:
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Helps with ductwork/piping layout and sizing.
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Heat-Generating Equipment or Areas:
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Such as kitchens, server rooms, machinery, etc.
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Window Locations and Orientation:
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Impacts cooling load due to solar gain.
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Preferred Equipment Location:
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Rooftop, basement, external pad, etc.
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Any Special Requirements:
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Noise limits, zoning restrictions, redundancy, energy efficiency targets (LEED, BREEAM, etc.)
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Once you upload these or describe them in detail, I can:
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Draft a basic schematic showing chillers/boilers, pumps, AHUs, piping loops, etc.
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Suggest initial equipment selection (capacities, types, configurations).
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Provide layout guidance for plant and major piping.
Examples/Shared projects
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)
ASHRAE & Cooling Tower Design Guidelines
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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.
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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):
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Design WBT: 30–32 °C
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Design DBT: 48–52 °C
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
Important Design Considerations
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Cooling tower approach temperature (how close it cools to ambient WBT) is typically 3–6 °C.
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As WBT increases, tower performance declines unless tower size or water flow is increased.
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High WBT may require larger towers, higher air flow, or hybrid/adiabatic cooling designs.
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:
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0.4% Summer Design Condition: For critical systems like cooling towers or process cooling.
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For example, in a hot climate (Middle East or Iraq), this might translate to:
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WBT: 30–32 °C
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DBT: 48–52 °C
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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):
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Design DBT: ~52 °C
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Design WBT: ~32 °C
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Tower Cold Water Temp Target: ~36–38 °C (if 4–6 °C approach is applied)