References: Over 6,400 customers in more than 70 countries.

Visit our References page to discover how over 6,400 customers in more than 70 countries—from small and medium-sized businesses to global corporations—are benefiting from the efficient system solutions offered by ONI-Wärmetrafo GmbH. Learn about a selection of international partners and projects that have increased their efficiency and sustainably reduced energy costs using modern energy and process technology. Immerse yourself in real success stories from industry, plastics processing, and more—strong evidence of reliability and performance worldwide.

Proven Excellence

References & Testimonials

In its extensive new facilities, the injection molding company Müller-Technik now only uses gas to heat water for a hand-washing sink. The energy…

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By opting for a proactive energy-saving policy, Bruder has set the stage for a sustainable reduction in energy costs.

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Kunststofftechnik Backhaus. has an excellent reputation in the automotive industry and other sectors that place a high value on quality, innovation,…

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Cleanroom technology and energy efficiency go hand in hand.

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LKH Injection Molding Technology sustainably reduces energy consumption

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ZKW Investing to save. Strategically planned energy savings

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Among construction professionals, the name Hilti is synonymous with reliability and safety. The company has earned a leading position among the…

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ZKW Investing to save. Strategically planned energy savings

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Secure packaging, designed with sustainability in mind.

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In its extensive new facilities, the injection molding company Müller-Technik now only uses gas to heat water for a hand-washing sink. The energy…

Read more

By opting for a proactive energy-saving policy, Bruder has set the stage for a sustainable reduction in energy costs.

Read more

ZKW Investing to save. Strategically planned energy savings

Read more

Among construction professionals, the name Hilti is synonymous with reliability and safety. The company has earned a leading position among the…

Read more

Secure packaging, designed with sustainability in mind.

Read more

With a strong focus on quality and cost efficiency, the Ansbach-based closure specialist Heinlein Plastik-Technik has invested in its energy and…

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Success through quality, efficiency, and hygiene standards

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Minimizing Energy Consumption as a Competitive Advantage

Energy management at PET blow molding and injection molding company Obeck Verpackungen.

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For decades, the name AVS Ing. J.C. Römer GmbH has been synonymous with exceptionally high-quality plug-in and screw-in connectors, solenoid valves,…

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Given the German government’s ambitious goal of reducing CO2 emissions by 40% by 2020 compared to 1990 levels, energy-intensive businesses in…

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ZKW Investing to save. Strategically planned energy savings

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With a strong focus on quality and cost efficiency, the Ansbach-based closure specialist Heinlein Plastik-Technik has invested in its energy and…

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Kunststoff- und Elektrotechnik GmbH uses refrigeration systems from Oni-Wärmetrafo GmbH at its production site in Mönchweiler.

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Innovative, energy-efficient, and successful worldwide

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Minimizing Energy Consumption as a Competitive Advantage

Energy management at PET blow molding and injection molding company Obeck Verpackungen.

Read more

For decades, the name AVS Ing. J.C. Römer GmbH has been synonymous with exceptionally high-quality plug-in and screw-in connectors, solenoid valves,…

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By offering comprehensive, one-stop solutions—ranging from product development and tooling to highly specialized manufacturing processes—VEMA has…

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Cleanroom technology and energy efficiency go hand in hand.

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