We control heat at the source. Wherever the source may be.

Cooling is no longer a supporting system. It defines system performance, reliability and economics. Our technology addresses thermal constraints across several industries.

Data centers
Space & defense
Telecom

Data centers.

Compute is scaling. Cooling must keep up.

Data centre energy consumption is doubling. Conventional cooling systems account for a significant portion of that energy use and occupy up to 25% of rack space. Thermal management has become a bottleneck, and it is getting worse.

Product offering

APR Rheion® Cooling Architecture

The APR Rheion® Cooling Architecture removes heat directly where it is generated. It responds immediately to hotspots by increasing cooling liquid flow locally, on chip scale, making it significantly more energy efficient than systems that provide non-targeted cooling. The architecture is compact, enabling higher compute density within the same physical footprint, and scalable from liquid cooling at component level to full immersion cooling. Because heat is removed directly where it is generated, the cooling liquid can operate at higher temperatures. This means the system runs efficiently without dependence on cold water or chillers, even in warm climates, and produces higher quality waste heat.
Cooling liquid inlet 30 to 40°C / outlet 45 to 60°C
20 to 30% lower cooling energy consumption
Up to 80% reduction in CO₂ emissions
Up to 100% increase in usable computing area

APR AIDC 800V BBU (In development)

As AI workloads drive demand for higher power density, reliable backup power becomes a critical part of data center infrastructure. The APR AIDC 800V BBU is a fully integrated, immersion cooled energy storage unit designed for AI data centers running 800 VDC power architecture. Rack-native and compatible with standard 19-inch racks, it connects directly to existing facility infrastructure with no additional cooling infrastructure required.

16 kWh battery capacity, 48 kW continuous / 75 kW peak
Stackable to 768 kW in NVIDIA MGX Sidecar
LFP cell chemistry
Modbus TCP interface
Download product sheet
Talk to our data center team

Space & defense.

Where failure is not an option.

The APR thermal management products for spacecraft and defense systems enable improved thermal performance, improved control and reduced system level cost in space and defense applications. The products are designed in collaboration with NASA, ESA and Airbus and validated to function with radiation, vacuum and vibrations thanks to their hermetic ceramic construction and design without moving parts. The technology has only limited influence from gravity, making it possible to conduct testing on the ground.

Product offering

Thermal switches

Thermal switches, built on Rheion® technology, enable precise modulation of thermal conductance between two thermal interfaces, with the possibility to minimize conductance by switching the device off at any given time. They are especially suitable for surfaces facing large shifts of sun exposure during a space mission and can be used for precise thermal control of sensors or other thermally sensitive equipment. They also optimize on-board thermal conditions during orbit by controlling the conductance to the radiators.
ON/OFF control from bus voltage 100V or 28V

Power consumption in OFF mode: 0W


Operating temperature: -40 to +70°C (primary) / -50 to +90°C (secondary)


Heat transport: up to 150W

Quick start/stop time at any operating temperature

No moving parts. No mechanical wear

Pumped loops

Pumped loops allow for the transport and spreading of heat over distances on spacecraft as well as precise active control of temperatures in a changing environment. Using Rheion® units with no moving parts, the pumped loops create virtually no vibrations. This gives them a long operational lifetime, unlike systems using mechanical pumps where limited lifetime and induced vibrations are known issues. The pumped loops are suitable for precision thermal control of sensitive equipment located anywhere in the satellite, cooling of high-power equipment located far from the radiator and as an overall thermal system for a smaller satellite picking up heat from several heat loads and rejecting it at the radiator.

Heat removal: over 200W at 40K ΔT

Operating temperature: -50 to +70°C


Immediate ON/OFF capability


Loop response time: typically 5 to 30 seconds depending on loop length


Temperature stability: less than 0.1K

Heat exchanger size and tube routing can be customised for each application.

APR Drone Battery Pack – 300 Wh/kg (In development)

Defense UAV platforms require power systems that perform without compromise. The APR Drone Battery Pack combines high energy density Ni+SiC cells with integrated dielectric immersion cooling, delivering stable performance from -30 to +55°C, fast recharge in 18 minutes and a 2,000-cycle service life. Capacity, voltage and form factor are configurable to platform requirements.

From arctic reconnaissance to desert surveillance, the battery pack is designed for electric drones where mission reliability and performance are non-negotiable. Typical applications include long-endurance ISR drones, logistics UAVs and autonomous systems operating in extreme conditions.

Energy density: up to 300 Wh/kg at pack level


Operating temperature: -50 to +55°C

Fast charge 10 to 80% in 18 minutes

2,000 cycles at over 80% capacity retention

IP67

Download product sheet
Talk to our space and defense team

Telecom.

Always on. Always cool.

Dense, always-on infrastructure requires compact, highly reliable and energy-efficient thermal management. APR enables the next leap in network performance by managing thermal constraints across processors, power electronics and the thermal flow itself in edge nodes, base stations and distributed telecom infrastructure. Rheion® units drive a self-regulating, low-energy active-passive cooling principle, delivering cooling exactly where and when it is needed, without fans, without mechanical pumps and without unplanned downtime. Compared to conventional pump-driven systems the result is higher efficiency, reduced system complexity and improved reliability. Combined with integrated battery solutions for fast-response backup and dynamic load balancing, APR strengthens both efficiency and resilience across modern telecom infrastructure.
Higher equipment density and network capacity 
within existing space and power boundaries
Stable thermal performance under continuous 
always-on operation
Silent and dust-proof, fully sealed, no fans

Reduced energy consumption

Longer component lifetime, no thermal 
stress cycling

Talk to our telecom team
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