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Cooler FC3

Available in a variety of models and specifications, the FC3 line delivers high-capacity three-fan, air-to-liquid passive cooling for hydrogen fuel cells.

FC3 models integrate seamlessly into FCEVs or stationary power systems, ensuring safe and efficient thermal management. With options including Grayson’s V3 CAN-enabled controller and a range of mounting options, these plug-and-play coolers provide reliable, proven performance with precise fan speed regulation and compatibility with de-ionised water coolant systems.

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Overview

Hydrogen fuel cell systems require stable thermal control for efficiency and stack longevity. The FC3 line uses three-fan, air-to-liquid passive cooling to maintain optimal stack temperatures, circulating coolant through the stack and dissipating heat via a tube-and-fin radiator with high-performance fans.

Available in rooftop or vertical mounts, the FC3 integrates optional Grayson Intelligent Thermal Controller and thermal logic software for precise CAN-based fan regulation. Compatible with de-ionised water and capable of supporting waste heat recovery into vehicle HVAC, it provides OEMs a plug-and-play solution or configurable platform.

Grayson offers off-the-shelf or custom designs, working with OEMs to calculate ambient limits, flow rates, heat rejection, and coolant temperature, ensuring reliable thermal performance tailored to each application.

Features

Our coolers are developed with features that promote effective heat management, long service life, and seamless fit within vehicle systems.

  • Air-to-liquid cooling: Maintains stable coolant temperatures to protect hydrogen fuel cells from overheating.
  • Three-fan design: Delivers the right balance of size and performance for fuel cell stacks.
  • Mounting flexibility: Rooftop and vertical models support diverse vehicle and system layouts.
  • V3 CAN controller (as standard on certain models): Enables smart fan speed regulation and optimised energy consumption.
  • De-ionised water compatibility: Safe for use with hydrogen fuel cell systems.
  • Proven reliability: Backed by over one million coolers delivered worldwide.
Technical

Each technical component contributes to dependable cooling performance, supporting reliability in everyday and heavy-duty operation.

  • Fan configuration: 3-fan
  • Voltage: 24V DC
  • Mounting: Rooftop or vertical options
  • Control: Optional V3 CAN-enabled controller with thermal logic software
  • Coolant: Compatible with de-ionised water
  • Applications: Hydrogen fuel cell stacks in FCEVs and stationary power.
Fan Configuration

3-Fan Design

Balanced cooling performance with a compact footprint.
Control Options

Optional CAN control

Smart CAN-based fan speed regulation.
Cooling Method

Air-to-liquid

Reliable heat rejection for stable fuel cell operation.
Mounting Options

24V DC

Reliable, proven electrical configuration across all FC3 models.
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Compatible Applications

Product Benefits​

Discover why leading fuel cell stack manufacturers recommend Grayson’s FC3 line of coolers to deliver the required cooling for their systems.

Protects fuel cell systems

Maintains optimum coolant temperature for performance and durability.

Energy-efficient cooling

CAN-enabled control reduces power draw and noise.

Waste heat utilisation

Capability to recycle heat from the fuel cell into HVAC systems, improving efficiency.

Flexible integration

Various mounting options, including rooftop or vertical mounting, to meet packaging needs.

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Our Capabilities

We can ensure the right cooler for your needs

We work with OEMs to calculate the most suitable system, or develop a custom system, 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

With four decades of experience, Grayson Thermal Systems is a trusted global provider of heating and cooling solutions. Our products and services are designed for lasting performance and dependable operation.