01

Why this matters

Most refrigeration runs on chemicals that warm the planet, or quietly poison it.

HFCs warm the atmosphere up to 14,000× more than CO₂. Their HFO replacements break down into TFA, a forever chemical now detectable in rain, ice, and human blood.

The answer

CO₂, ammonia, hydrocarbons. Proven for over a century. They don't warm the planet, and they don't leave a forever chemical behind.

Natural refrigerants avoid both.

02
Primary metric

A year of avoided emissions, made visible.

GHG emissions Efficient Energy GmbH avoided over the lifetime of 2021's equipment placed in the market.

Efficient Energy GmbH · 2021

11,570metric tons of CO₂e avoided.

Over the lifetime of 2021's equipment placed in the market. The comparisons that follow show what that volume actually looks like.

03
In real-world terms

What it adds up to.

2.5k
cars off the road
for one year of driving emissions avoided
46.2M
km not driven
distance equivalent never burned in a tank
0.1%
of Munich Metropolitan Region’s
annual emissions
04
Leadership

In their own words.

As a pioneer of a new cooling standard with water (R718) as a refrigerant, we stand for a holistic climate protection and sustainable business approach belonging to our unambiguous corporate values. We are happy to be recognised by ATMOsphere as a Best in class natural refrigerant company. This label means a lot for us, because it underlines that natural refrigerants needs to be more visible in the refrigeration industry labelling them as existing and proven energy efficient and powerful refrigerants to help other industries on their path to climate-neutral.

Georg Dietrich · CEO, Efficient Energy GmbH
05
Voices from the field

What operators say after a year on natural refrigerants.

Michael Nieser
Projektleiter
Sparkassen-IT
Performance
Has the system performed as promised over the past year?

The system fully meets our expectations. We can often use free cooling or the Freecooling+ operating mode supplemented by low use of mechanical refrigeration and get very high EER values.

Michael Nieser
Projektleiter
Sparkassen-IT
Quality & Reliability
How reliable has the equipment been?

We have been using the units for several years and rarely have any problems.

Michael Nieser
Projektleiter
Sparkassen-IT
Service
Were you satisfied with the level of service and technical support?

Maintenance and repairs by the manufacturer work promptly and without problems.

Michael Nieser
Projektleiter
Sparkassen-IT
Safety
Has the supplier complied with applicable safety requirements?

Yes. We have been using the units since the pre-series stage. During this time, we were also able to incorporate our experience into the series devices.

Michael Nieser
Projektleiter
Sparkassen-IT
Satisfaction
Would you work with this company again?

Yes. We had a classic chiller at the beginning. We shut it down and bought additional e-chillers. If we have a comparable application scenario, we will use Efficient Energy units again.

Carolin Rublack
Manager Marketing
PBIT Systeme GmbH & Co. KG
Performance
Has the system performed as promised over the past year?

With the use of the eChiller, among other things, we were clearly able to meet our goal of operating a sustainable, environmentally friendly data center. The implementation of the thermodynamic cycle process in the eChiller systems far exceeded the energy saving expectation. The savings were achieved, among other things, by the free cooling mode and stepless partial load control. We are also positively impressed by the extremely quiet operation of the systems. We are convinced that Efficient Energy's technology can prevail in many sectors of the economy.

Carolin Rublack
Manager Marketing
PBIT Systeme GmbH & Co. KG
Quality & Reliability
How reliable has the equipment been?

The eChillers have been operating reliably in the data center of PBIT Systems GmbH & Co. KG since February 2022. Even with high outside temperatures of 39°C in the summer months, the chillers always ensured error-free operation with constant air conditioning.

Carolin Rublack
Manager Marketing
PBIT Systeme GmbH & Co. KG
Service
Were you satisfied with the level of service and technical support?

Efficient Energy's technology definitely delivers what it promises. We can cool our data center efficiently and emission-free with low operating costs.

Carolin Rublack
Manager Marketing
PBIT Systeme GmbH & Co. KG
Safety
Has the supplier complied with applicable safety requirements?

Yes, due to the sustainable, innovative technology of eChiller, which ensures the cooling of the server rooms using water as a refrigerant, the system not only plays a key role in terms of environmental protection and CO² savings, but also in questions of economy and operational safety.

Carolin Rublack
Manager Marketing
PBIT Systeme GmbH & Co. KG
Satisfaction
Would you work with this company again?

Definitely! A very reliable partner with a reliable product!

Stefan Schwert
Versorgungstechnik, Fachplaner TGA
Innenministerium Kiel , Germany (?) GM.SH - Gebäudemanagement Schleswig-Holstein AöR
Performance
Has the system performed as promised over the past year?

The product has achieved the promised efficiencies. Chillers work continuously since 7/2021

Stefan Schwert
Versorgungstechnik, Fachplaner TGA
Innenministerium Kiel , Germany (?) GM.SH - Gebäudemanagement Schleswig-Holstein AöR
Quality & Reliability
How reliable has the equipment been?

No breakdowns so far.

Stefan Schwert
Versorgungstechnik, Fachplaner TGA
Innenministerium Kiel , Germany (?) GM.SH - Gebäudemanagement Schleswig-Holstein AöR
Service
Were you satisfied with the level of service and technical support?

The customer service contacted via email or phone is very competent, helpful and fast. The customer service in place is also very competent. It took a long while to get the ordered extension installed, but it wasn't critical for us.

Stefan Schwert
Versorgungstechnik, Fachplaner TGA
Innenministerium Kiel , Germany (?) GM.SH - Gebäudemanagement Schleswig-Holstein AöR
Safety
Has the supplier complied with applicable safety requirements?

Everything needed to provide safe operation is already included in the basic package.

Stefan Schwert
Versorgungstechnik, Fachplaner TGA
Innenministerium Kiel , Germany (?) GM.SH - Gebäudemanagement Schleswig-Holstein AöR
Satisfaction
Would you work with this company again?

Yes. No problems with the products and -as far as I know- still the only chiller with water as refrigerant. Meanwhile we equipped three locations with different conditions: IT-Cooling, with cold-water-reservoir, IT-cooling without reservoir (work in progress) and comfort-cooling.

06
The company

Efficient Energy GmbH: company profile.

Efficient Energy GmbH is a manufacturer and system supplier of environmentally friendly refrigeration technology based near Munich, Germany. The company produces the eChiller line of chillers, which use pure water (R718) as the refrigerant — entirely eliminating fluorinated refrigerants while delivering high energy efficiency. The eChiller systems cover cooling capacities from 20 to 45 kW per unit and scale modularly to 300 kW, making them suitable for data centers, office buildings, and industrial process cooling. The thermodynamic cycle process enables free cooling modes and stepless partial load control, resulting in very high EER values and near-silent operation.

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Does your company use natural refrigerants?

The ATMO Approved label is independently verified. Not self-declared, not marketing. If your equipment runs on CO₂, ammonia, hydrocarbons, or water, you may qualify.

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