Worldwide Presence.

ONI-Wärmetrafo GmbH
Headquarters in Lindlar

Our main factory, which is located in Lindlar, in the Oberberg district between Gummersbach and Cologne, accommodates all specialist departments in one location. This enables us to coordinate every step of the process in the best possible way, from design planning to the turnkey final assembly of the system.

Project management is also located here and, in coordination with purchasing, warehousing, assembly and dispatch, can thus realize international projects in the most effective way thanks to short communication channels.

ONI-Wärmetrafo GmbH
Niederhabbach 17
D-51789 Lindlar

Phone: +49 2266 4748-0
Fax: +49 2266 3927


ONI Energy Saving Technology Co., Ltd.
Branch Kunshan (China)

ONI also manufactures at its Kunshan City site in China, thus offering even better handling of international projects, especially in the Asian market.

ONI Energy saving technology (Kunshan) Co., Ltd.
No.329, Jujin Rd, Zhang Pu Town
215321 Kunshan City, Jiangsu Province
P. R. China

Phone: +86 512 3662-5112
Fax: +86 512 3662-5111

German Contact:

Guido Hamm
Area Sales Manager Asia Pacific

Phone: +49 171 4455387

ONI Temperiertechnik Rhytemper GmbH

ONI Temperiertechnik Rhytemper GmbH Großröhrsdorf, a subsidiary of ONI-Wärmetrafo GmbH in Lindlar, is a manufacturer of innovative temperature control solutions and a leading company in the field of multi-channel temperature control in both the plastic injection moulding and metal die casting industries. Thanks to a broad product range of highly efficient multi-channel temperature control systems, our company has a unique position in the global market.

ONI Temperiertechnik Rhytemper GmbH
Christian-Bürkert-Straße 4
D-01900 Großröhrsdorf

Phone: +49 35952 4110-0
Fax: +49 35952 4110 11