When processes and building systems need to run reliably, one thing matters above all else: available cooling capacity—immediately. With rental cooling from ONI, you can ensure your process cooling and refrigeration continue to function during outages, maintenance, or renovations, and flexibly provide additional cooling or air conditioning for peak loads. Whether you need mobile chillers, refrigeration units, or a temporary rental cooling solution: We deliver the right equipment, handle installation and commissioning, and ensure your systems continue to run smoothly—including a service plan and remote access for condition monitoring upon request.
When processes need to keep running, rental cooling is often the fastest and most cost-effective solution: it bridges the gap during renovations, covers peak demand, or ensures a supply in an emergency—without the long lead times associated with new equipment. That’s exactly why ONI maintains its own fleet of mobile cooling and refrigeration solutions: available at short notice, easy to plan, and designed for temporary use.
Typical benefits for industry and commerce:
When the cold water / water-glycol circuit temporarily lacks hydraulics, buffering, or distribution—e.g., to bridge a gap during renovation, to seamlessly integrate additional rental cooling, or to stabilize the flow rate. Typically, ONI offers a pump-tank unit with complete regulation / control as part of its rental service portfolio.
For planned or urgent additional or replacement cooling: Chillers / refrigeration units as a robust rental solution that can be quickly installed and made ready for operation—ranging from a few kW up to large units in the MW range (relevant, for example, for data center expansions or emergency plans).
For production-related requirements with a focus on availability and process reliability—ideal when downtime must be minimized and transitions need to be managed smoothly.
Typical applications include process cooling in manufacturing, safeguarding critical media circuits, and rapid response to failures and planned shutdowns. We provide short-term cooling on demand using mobile units.
For commercial applications and infrastructure (e.g., building/technical areas, temporary air conditioning, server rooms): short-term additional cooling capacity, transitional operation, or backup during renovations/malfunctions—including a complete system chain with free coolers/cooling towers and hydraulics, if required.
Bernhard Gell | Project Manager | HILTI
“For over 20 years, ONI has been responsible for the installation and technical support of refrigeration systems at Hilti Kunststofftechnik GmbH. During this time, our experience working with them has been entirely positive, both in terms of their consulting services and the quality of their work and technical support.”
Bernhard Gell | Project Manager | HILTI
“For over 20 years, ONI has been responsible for the installation and technical support of refrigeration systems at Hilti Kunststofftechnik GmbH. During this time, our experience working with them has been entirely positive, both in terms of their consulting services and the quality of their work and technical support.”
Kunststoff- und Elektrotechnik GmbH
Kunststoff- und Elektrotechnik GmbH uses refrigeration systems from Oni-Wärmetrafo GmbH at its production site in Mönchweiler.
