Adiabatic Coolers
Evaporative pre-cooling combined with dry cooler operation. Lower water consumption than open-circuit towers.
Technical Specifications
Tube Material
Copper
Fin Material
Al, AluP, Cu, Cu-ET
Fan Options
AC, EC
Medium
Water, Glycol, Coolflow DTX
Adiabatic System
Booster Pump, UV Water Treatment, Scale Prevention
High-Efficiency Cooling with Low Water Consumption
How Adiabatic Cooling Works
Enhanced Cooling During High Ambient Conditions
Our wetted surface adiabatic cooling system uses mains pressure water to wet the coil surface when ambient temperatures exceed a predetermined set point.
As air passes across the wetted coil surface, latent cooling occurs through evaporation, reducing the air temperature before it passes through the heat exchanger.
This process enables:
- Improved summer cooling performance
- Lower fluid outlet temperatures
- Reduced compressor loading
- Lower operating costs
- Increased system efficiency
- Reduced equipment footprint
With a design ambient of 20°C wet bulb, fluid outlet temperatures approaching 26°C can be achieved.
The system automatically reverts to dry air cooling once ambient temperatures reduce.
Low Water Usage & Legionella Risk Reduction
Unlike conventional cooling towers, our Adiabatic Dry Air Coolers do not store or recirculate water.
The water used for wetted surface operation is consumed only during peak ambient conditions and is completely discharged after use.
Designed Around Your Application
Every Adiabatic Dry Air Cooler is individually selected and configured to suit your specific cooling duty, ambient conditions, and installation requirements.
Available configurations include:
- Vertical Air Flow Adiabatic Coolers
- Horizontal Air Flow Adiabatic Coolers
- V Configuration Adiabatic Coolers
- W Configuration Adiabatic Coolers
- Centrifugal Fan Adiabatic Coolers
- EC Fan Equipped Systems
Our modular designs allow compact installations with excellent thermal performance and low operational noise.
High-Quality Construction
All HC Coils Adiabatic Dry Air Coolers are manufactured using premium materials and precision engineering techniques to maximise efficiency and long-term durability.
Standard construction features include:
- Seamless drawn copper tubes for efficient heat transfer
- Aluminium fins mechanically bonded to tubes for maximum thermal performance
- Heavy-duty galvanised steel casing with polyester powder-coated finish
- High-efficiency axial or centrifugal fan assemblies
- Industrial-grade motors for continuous operation
- Sparge pipe water distribution system
- Water distribution nozzles mounted on coil air-on face
- Solenoid-controlled water management system
- Integrated purge timer and drain arrangements
All components are designed for reliable industrial operation with minimal maintenance requirements.
Advanced Water Management System
Efficient Wetted Surface Control
Our Adiabatic Dry Air Coolers utilise a carefully controlled water management system to maximise efficiency while minimising water consumption.
The system includes:
- Sparge pipe water distribution
- Precision water spray nozzles
- Water flow regulating valve
- Mains water inlet solenoid valve
- Drain solenoid valve
- Purge timer controls
- Pressure gauges and manual drain points
The wetting cycle only activates after all fans are operating and ambient temperatures exceed the programmed set point.
Connection to the water mains requires a double check valve.
Energy Efficient Performance
Each Adiabatic Dry Air Cooler is optimised using advanced selection software to ensure:
- Maximum thermal efficiency
- Reduced energy consumption
- Low operating noise levels
- Minimal pressure drop
- Precise application matching
We offer a range of energy-saving technologies including:
- EC variable speed fan motors
- Inverter fan speed control
- Multi-speed fan arrangements
- Low noise fan packages
- Intelligent control systems
Our Ziehl-Abegg EC Blue Owlet fan technology delivers high efficiency with exceptionally low operating noise.
EC Fan Technology
Intelligent Variable Speed Fan Control
We offer advanced EC fan technology across our Adiabatic Dry Air Cooler range to maximise efficiency and minimise operating costs.
EC fan assemblies feature electronically commutated motors with integrated speed control for:
- Reduced energy consumption
- Improved cooling efficiency
- Lower operating noise
- Precise temperature control
- Extended motor life
Integrated 0–10V proportional speed control allows fans to operate only at the required speed, reducing running costs and improving seasonal efficiency.
Key Advantages
- Extremely low annual water consumption — wetting cycle activates only during peak ambient conditions.
- Virtually zero standing water — no reservoirs or recirculation; water is discharged after use.
- Very low risk of Legionella contamination — single-pass mains water with no stagnation.
- Reduced maintenance requirements — fewer wetted components and no cooling tower upkeep.
- Lower water treatment costs — no recirculating system to dose, blow down or biocide.
Optional Features
UV ultra violet water treatment — for water hygiene and microbial control.
Water scale prevention devices — protect coil surfaces and prolong service life.
Mains water booster pumps — ensure consistent supply pressure to the wetted surface system.
Polyester coated aluminium fins — for protection in aggressive or coastal environments.
Copper or tinned copper fins — alternative fin materials for specialised duties.
Blygold and Heresite protective coatings — premium corrosion protection for harsh atmospheres.
EC variable speed fan assemblies — high efficiency with low noise and reduced energy use.
Fan cycle temperature control panels — for precise step control of cooling capacity.
Inverter fan speed control — modulating fan output to match real-time demand.
Low noise fan packages — suited to acoustically sensitive sites.
Stainless steel casing options — for marine, hygienic or high-humidity environments.
Custom powder-coated casings — bespoke colour finishes to match site requirements.
Typical Applications
Data Centres
Process Cooling
Water Chiller Systems
Power Generation / CHP
Industrial Manufacturing
Downloads
Product Catalogue
Full specifications, dimensions and performance data.
Operation & Maintenance Manuals
Installation, commissioning and maintenance instructions.
Standards & Accreditations
All our products meet exceptional standards, achieved by testing and inspecting our coils and products regularly and adhering to strict procedures.
"HC Coils are great to work with, on time, efficient, clean and tidy.
Project References
Somerset House, London
Product: 7× adiabatic coolers
Engineered for a heritage site with acoustic and footprint constraints.
Common Questions — Adiabatic Coolers
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