Free Coolers
Ambient air cooling to reduce compressor run hours and energy consumption when conditions allow.
Technical Specifications
Cooling Method
Ambient Air (No Compressor)
Best At
Low Ambient Temps
Test Pressure
16 bar (water)
Energy
Excellent (Passive)
Fan Options
EC Variable Speed
Free Coolers
Free coolers utilise low ambient air temperatures to provide cooling without the need for mechanical refrigeration. HC Coils designs and manufactures bespoke free cooling systems that integrate into your existing chilled water or glycol loop, reducing compressor run hours and energy consumption. When ambient conditions are favourable, the free cooler handles the full cooling load. As temperatures rise, the system transitions back to mechanical cooling. This hybrid approach delivers significant energy savings — particularly in the UK climate where free cooling hours are substantial.
Key Advantages
- Reduced compressor hours — offloads chiller duty during cooler ambient periods.
- Hybrid operation — transitions between free cooling and mechanical cooling based on ambient temperature.
- Bespoke sizing — designed to your duty, loop temperatures and ambient conditions.
- Simple systems — fewer moving parts, straightforward maintenance.
Typical Applications
Data Centres
Commercial HVAC
Process Cooling
Server Rooms
Retail
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.
Common Questions — Free Coolers
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