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.

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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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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.

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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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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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Our customers

These customers already trust us

AEG logo
AFK logo
Ahle Federn logo
Airbus logo
AKG logo
Akro-Plastic logo
Atlas Copco logo
Audi logo
Aurubis logo
Balda AG logo
Barlog plastics logo
Battenfeld logo
Behr Service logo
Bergi-Plast logo
Bilstein logo
BMW logo
Borscheid + Wenig logo
Bortec logo
BP logo
Brose logo
Bruder logo
Bosch und Siemens Hausgeräte (BSH) logo
Badische Stahlwerke (BSW) logo
BWP logo
Coko logo
Cotarko logo
Degussa logo
Delphi logo
Deutz logo
Disc-Pac logo
Dörrenberg Edelstahl logo
Dura Automotive Systems logo
Drahtwerk Köln (DWK) logo
Dynamit Nobel logo
Eaton logo
EDAG logo
Ehlebracht AG logo
EKT Kunststoff logo
Elotherm (SMS group) logo
EMA Induction Technology logo
EnBW logo
Engel logo
Ensinger logo
Euroguss logo
Evonik logo
Faurecia logo
FEP logo
Ferromatik Milacron logo
Flender logo
Flühs Drehtechnik logo
Ford logo
Fries logo
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Gambro logo
Gardena logo
Gealan logo
Georg Fischer logo
Gerodur logo
Gizeh logo
Carl Gommann Härterei logo
Hager logo
Hansgrohe logo
HBW-Gubesch Kunststoff-Engineering logo
Heismann Drehtechnik logo
Hella logo
Heyco logo
Hilti logo
HKM logo
HTP logo
Hünersdorff logo
Husky logo
International Automotive Components (IAC) logo
Ineos logo
ITW Automotive logo
Johnson Controls logo
Jokey logo
Joma-Polytec logo
Kärcher logo
Kautex logo
Key Plastics logo
Kirchhoff Automotive logo
Kuhn Edelstahl logo
KMS logo
Korinex logo
KraussMaffei logo
Kröger logo
Kunststofftechnik Backhaus logo
KTW Group logo
Lear logo
Leoni logo
Liebherr logo
Linpac logo
LKH Kunststoffwerk logo
Lüdecke logo
Lumberg logo
Magna logo
Mapa logo
Menshen logo
Mercedes-Benz logo
Mitsubishi Paper Mills logo
Möller logo
Möller Tech (MöllerGroup) logo
Montaplast logo
Müller Technik – Präzision in Kunststoff logo
Multiform logo
Otto Fuchs logo
Otto logo
Perstorp logo
Philips logo
Phoenix Contact logo
Plastitec logo
Plaston Group logo
Plastromayer logo
Playmobil logo
Pollmann logo
Polymer-Chemie logo
Polytec Group logo
ARaymond logo
Reese Härterei logo
Renolit logo
Rexam logo
Riegler Kunststoff- und Medizintechnik logo
Rittal logo
Röchling Gruppe logo
Rosti logo
Rotho logo
RPC logo
Sachs logo
Salzgitter Hydroforming logo
Scanex logo
Schaegner logo
Schaltbau logo
Schmidt + Clemens logo
Schneegans logo
Schoeller Allibert logo
Schuler logo
Simona logo
SLM Kunststofftechnik logo
SMP (Samvardhana Motherson Peguform) logo
Sonoco Plastics logo
Schoeller logo
Sprint Metall logo
Stauff logo
Stehr logo
Stöckli logo
Streng Plastic logo
Sulo logo
TDK logo
ThyssenKrupp logo
Ticona logo
TPP logo
Trisa of Switzerland logo
Tupperware logo
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Vetter logo
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Weber logo
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