World's first.

The Blue e+ cooling unit series – the ultimate in efficiency. Worldwide.

What is the basis of Blue e+?

A special short video.
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A revolution in energy efficiency through innovative hybrid technology.

Heat pipe technology.

Learn more about this on the next page.

Future-proof climate control.

  • Active cooling circuit with speed-regulated components for demand-based cooling
  • Integrated heat pipe for passive cooling

Energy efficiency at a glance.

  • Energy Efficiency Ratio: the standard KPI
  • Seasonal Energy Efficiency Ratio: reflecting actual consumption

Download brochure (PDF)

The e+ Principle.

Energy efficiency through hybrid technology.

Ambient temperature above enclosure internal temperature

Ambient temperature equal to enclosure internal temperature

Ambient temperature below enclosure internal temperature

Hybrid technology:
Pioneering climate control.
  • Average energy savings of 75%
  • Active cooling circuit with speed-regulated components for demand-based cooling
  • Integral heat pipe for passive cooling
  • Constant temperature inside the enclosure
  • Component-friendly cooling for a longer service life

Average energy savings
of 75%

Work out how much
you could save.

Energy efficiency calculator

Proven savings potential
with leading technologies.

Performance comparison video

TopTherm Plus


The first cooling units with nano-coating and integrated electric condensate evaporators.

Blue e


The first cooling units with EC fans and Eco-mode control.

Blue e+


The first cooling units with integrated heat pipes and speed-regulated refrigerant circuit.

Maximum flexibility
with multi-voltage capability.

One device for all supply voltages and networks.

Multi-voltage capability video

Suitable for worldwide
use with:

  • 110–240 V, 1~, 50/60 Hz
  • 380–480 V, 3~, 50/60 Hz

Reduced complexity saves effort and storage space.

  • One standard model, one range of spare parts
  • Lower storage and logistics costs

Versatility through
standard assembly.

Easy assembly.

  • A single version for external, partial internal and full internal mounting
  • Standardised installation cut-outs for multiple output categories
  • Maintenance-friendly filter mat replacement

Rapid assembly.

  • Handles for convenient transport and positioning
  • Eyebolts for easy mounting

Thermal management protects components
and extends their service life.

Guaranteed constant temperature
inside the enclosures.



“The multi­voltage capability of the new Blue e+ cooling units is naturally very important for us. It enables us to further expand the application flexibility of our machines, and also serves to reduce costs with regard to logistics and warehousing. In future, we no longer need to worry about voltage variants. That makes the new Blue e+ cooling units an absolute must as far as we are concerned.”
Richard Wagner, Head of Electrical Design and Development, Bihler As the world's leading system supplier for forming, welding and assembly technologies, the company Otto Bihler Maschinenfabrik has stood for innovative machine systems and automation solutions for 60 years.


“Since we have been testing the cooling units in our factory, we have already recorded an energy saving of 75 per cent for the Blue e+ unit compared to its predecessor Blue e. That is not only a very good result from the technical perspective, but also makes the Blue e+ cooling unit a must under all economical aspects.”
Stéphane Cottard, Head of Construction and Climate Control, Renault de Cléon The French automobile manufacturer with headquarters in Cléon counts a global workforce of over 100,000 employees and, through its alliance with Nissan Motors, is one of the largest car manufacturers in the world.

Kapp Niles:

“I was both surprised and impressed by the results. The temperature accuracy of the new Rittal Blue e+ cooling units permits significant reduction of the thermal stress placed on control devices and thus automatically extends the service life of our systems. An absolute plus for us in mechanical engineering.”
Alfred Tenner, Head of Department for Measuring and Control Technology, Kapp Werkzeugmaschinen GmbH With around 850 employees worldwide, the KAPP Group offers innovative technologies and systems for the precision finishing of gears and profiles for demanding customer applications.


“The immediate benefit of the new Blue e+ cooling units from Rittal is the fact that we can in future designate a single unit to cover all the mains voltages and frequencies used by our customers all over the world. The concentration on just a single article number for each output class simplifies warehouse and product data management, and saves us both time and costs along the whole chain from planning, via purchasing to warehousing.”
Thorsten Rettich, Managing Director, J.G. Weisser GmbH & Co. KG WEISSER is global technology leader in the manufacturing of multifunctional precision turning centres and one of the world's top suppliers to the major car manufacturers.