ONI-Wärmetrafo GmbH

Postfach 2169, 51784 Lindlar
Niederhabbach 17, 51789 Lindlar
Telephone +49 2266 4748-0
Fax +49 2266 3927


Hall map

THERMPROCESS 2015 hall map (Hall 9): stand F01

Fairground map

THERMPROCESS 2015 fairground map: Hall 9


Günter Steeger

Geschäfts- /Unternehmensleitung

Niederhabbach 17
51789 Lindlar, Germany

02266 4748 0


Thomas Teuner

Marketing, Vertrieb, Werbung, PR

Niederhabbach 17
51789 Lindlar, Germany

02266 4748 0


Our range of products

Product categories

  • 02  Equipment for special use
  • 02.01  Cooling
  • 02.01.02  Recooling equipment

Recooling equipment

About us

Company details

Energy-saving and process-optimized system solutions

For three decades customers have been relying on innovative energy-saving technology from the ONI company. Today, more than 4000 satisfied customers in more than 60 countries in the world appreciate the ONI system technology. The customer base now ranges from small and medium-sized companies to global players. All this started with a system for heat recovery of waste heat from hydraulic machines. Today, the product and service scope ranges from consultation and planning to the turnkey construction of complex energy-optimized plants for the plastic-processing, metal-processing, medical engineering and chemical industry or automotive sub-suppliers.
The power of the cooling system technology ranges from 5 to 150,000 kW.
"Our energy-saving and environmentally compatible system solutions significantly contribute to a reduction in power costs and pollution in companies and improve our customers' competitive position."The most different expert bodies and high-profile juries of important company contests award excellent results to both the energy-saving system solutions and the performance of the company again and again. Thus, Mr. Wolfgang Oehm, managing partner of the company, received six important awards in the past year of 2012 alone such as the 4th gold medal for especially innovative and energy-saving technology in Poland, awards in the contests "Hidden Champion" by the n-tv news station, "Großer Preis des Mittelstandes" (Great Award for small and medium sized enterprises) of the Oskar-Patzel foundation, "Entrepreneur des Jahres" (entrepreneur of the year) of the Ernst & Young auditors, and the "Initiativpreis NRW" of the WGZ bank for the creation of many new jobs in Germany.
But even politicians, ministers of the federal and state governments above all, are aware of the excellent achievements of entrepreneur Wolfgang Oehm and commend the exemplary company philosophy, dynamic development and the impeccably lived social responsibility.

ONI …a track record from three decades

"We owe the fact that we have been so successful with our energy-saving plants and systems for 30 years to more than 4000 satisfied customers in more than 60 countries in the world," says Wolfgang Oehm, managing partner of the ONI-Wärmetrafo GmbH at Lindlar, about the ONI track record from three decades ...and "30 years of ONI energy-saving technology are a reason for a celebration!“

...and a celebration was arranged, with two parties on one day and more than 1000 guests. Together with the employees of the company, a lot of personalities from business and political life celebrated the inauguration of the new production hall and its administration department in the afternoon and the anniversary of the company's existence in the evening. A great show programme with known artists provided the colourful background for a completely successful event.
The well-wishers from the federal political life included the former Minister of the Environment and today's Head of the Office of the German Chancellery, Mr. Peter Altmeier, as well as Mr. Garrelt Duin, State Minister of the Economy, Mr. Johannes Remmel, State Minister of the Environment, Mr. Guntram Schneider, State Minister for Work, Integration and Social Affairs, as well as Dr. Helfried Schmidt and Ms. Petra Tröger, board of the Oskar Patzelt Stiftung (foundation). In addtion, Mr. Herbert Reul, member of the European Parliament, had come from Brussels.


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Company data

Sales volume

50-99 Mio US $

Export content

max. 50%

Number of employees




Area of business
  • Components, equipment and other supplies
  • Consulting, design, service and engineering