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Cooler FC6

The FC6 line delivers six-fan, high-capacity air-to-liquid coolers designed for hydrogen fuel cell vehicles and stationary power systems.

Featuring lightweight brazed aluminium heat exchangers and long-life brushless fans, FC6 models provide powerful, efficient, and reliable cooling. Available with rooftop or vertical mounting and optional V3 CAN-enabled controller, FC6 coolers also include models with plate heat exchanger integration for waste heat recovery into HVAC systems, enhancing overall energy efficiency.

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Overview

Hydrogen fuel cells require high-capacity thermal control to maintain efficiency and protect stack longevity. The FC6 line provides six-fan, air-to-liquid passive cooling for demanding duty cycles, keeping coolant within optimal temperature ranges under heavy loads.

Each module integrates a brazed aluminium heat exchanger, six axial fans, and anti-vibration mounts, with options including Grayson’s Intelligent Thermal Controller for CAN-based fan regulation and plate heat exchangers to recycle waste heat.

With rooftop and vertical mounting, plug-and-play installation, and de-ionised water compatibility, the FC6 supports FCEVs and stationary power applications.

Available off-the-shelf or OEM-customisable, Grayson works with manufacturers to optimise performance for ambient limits, flow, heat rejection, and coolant temperature.

Features

Designed for demanding applications, our coolers feature efficient heat transfer, reliable performance, and straightforward installation.

  • Air-to-liquid cooling: Maintains fuel cell efficiency by keeping coolant temperatures stable under heavy-duty conditions.
  • Six-fan high-capacity design: Provides greater airflow and cooling performance for large fuel cell systems.
  • Brazed aluminium heat exchanger: Lightweight, durable, and fully compatible with de-ionised water.
  • Rooftop or vertical mounting: Flexible packaging for integration across vehicle platforms and power systems.
  • Optional V3 CAN controller: Enables smart fan regulation with Grayson’s proprietary thermal logic software.
  • Waste heat recovery option: Integrates plate heat exchanger to recycle stack heat into HVAC, reducing energy draw.
  • Brushless 24V fans: Long-life, low-noise, EMC R10 certified for reliability.
  • Reverse fan function: Maintains system efficiency by clearing dust and debris from the core.
  • Plug-and-play installation: Delivered pre-assembled for quick deployment with minimal commissioning.
  • Low maintenance design: Simplifies servicing, ensuring maximum uptime.
Technical

Each technical component helps deliver stable cooling capacity, ensuring consistent operation across a wide range of conditions.

  • Fan configuration: 6 × 24V DC brushless fans
  • Cooling method: Air-to-liquid, tube-and-fin design
  • Mounting options: Rooftop or vertical
  • Control: Optional V3 CAN-enabled controller with thermal logic software
  • Waste heat recovery: Plate heat exchanger option available
  • Construction: Lightweight brazed aluminium heat exchanger with anti-vibration mounts
  • Applications: Hydrogen FCEVs, off-highway, rail, military, and stationary power
Model Variants

The cooler range includes a variety of models, giving flexibility to match different vehicle platforms, performance needs, and system layouts.

  • 1A-6267-0A01 - 6-fan rooftop system with plate heat exchanger         
  • CP-6778-0006 - Fan system ,vertical mount     
  • 1A-6345-0A016 - Fan rooftop system , with harness and generical GTS controller      
  • CP-6267-100 - 6-fan rooftop system without plate heat exchanger     
Fan Configuration

Six-Fan Design

High-capacity cooling performance for large stacks and heavy-duty duty cycles.
Control Options

CAN Control Option

Smart CAN-enabled fan regulation with Grayson’s proprietary control logic.
Coolant Compatibility

De-ionised Water

Safe, efficient cooling for hydrogen fuel cell systems..
Mounting Options

24V DC

Reliable, proven electrical configuration across all FC6 models.
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Compatible Applications

Product Benefits​

Discover why on- and off-highway OEMs trust Grayson’s FC6 line of hydrogen fuel coolers in their latest generation applications.

High-capacity cooling

Six-fan design capable of delivering 100kW+ cooling capacity for larger hydrogen fuel cell systems

Energy-saving heat recovery

Captures fuel cell waste heat to support cabin HVAC, lowering energy consumption.

Low maintenance

Reverse fan cleaning and durable components reduce service downtime.

Proven reliability

 In-house design and global field validation ensure dependable performance.

Contact Us

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Our Capabilities

Calculating the right cooler for your fuel cell stack

We work with OEMs to calculate the most suitable cooler, or develop a custom cooler, for your thermal requirements, based on your ambient temperature limit, coolant flow rate (l/min), heat rejection (kW) and desired coolant temperature. Learn More

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Discover More About Grayson

For more than 40 years, Grayson Thermal Systems has supplied cutting-edge thermal management solutions to vehicle industries worldwide. Our expertise ensures reliable performance and long-term efficiency.