Industrial Heating: Powerful and Energy-Efficient
Industrial heating using existing energy instead of primary energy – ONI harnesses waste heat from processes and cooling circuits and makes it usable through heat recovery. Even cooling water at ~35°C can be used to heat offices, common areas, and industrial halls. We combine heat recovery from production and cooling processes with precisely tailored hydraulics, control systems, and—where appropriate—heat pumps as well as modular technical centers. This significantly reduces energy consumption and OPEX; boiler capacities can be reduced or replaced. ONI provides support from analysis through planning and grant assistance to commissioning and 24/7 service support.
- Systematically utilizing waste heat: Heat recovery from compressed air, cooling water, or process heat; usable starting at temperatures as low as ~35°C.
- Modular & quickly integrable: Containerized energy centers are well-established in the industry and accelerate implementation and large-scale retrofits—ONI implements comparable concepts on a project-by-project basis.
- Funding & Compliance: Support with EnEfG data collection and grant applications; ONI operates in accordance with ISO 9001/14001/50001.
- Immediate reduction in energy costs
- Medium-term CO₂ reduction and planning reliability
- Measurable ROI, fewer downtimes, a single point of contact (SPOC) – from concept to service
- Guaranteed quality/certifications, fewer interfaces, clear comparability
- Lower CAPEX hurdles (financing models), improve CO₂ and cost KPIs, robust references
As a reliable partner, ONI provides technical expertise, implementation, and service to ensure successful project execution.
At ONI, you get everything from a single source: from the initial consultation through analysis and planning to installation and commissioning—including tailored services for implementation, as well as service and maintenance. ONI begins by analyzing your specific conditions: facility usage, zones, operating hours, required heating capacity (in kW), available waste heat, existing products, and interfaces with ventilation and, if applicable, cooling systems
- Free initial consultation & quick check of waste heat (load data, temperature levels, heating requirements)
- On-site analysis & heat recovery concept, including hydraulic integration and (if applicable) heat pump
- Business case & subsidy roadmap (TCO/ROI, EnEfG compliance)
- Detailed planning & implementation, including commissioning and a 24/7 service contract
Water-heated air heaters (unit heaters / fan coil units)
Hot water is fed through pipes into the building and transferred to the indoor air in the air heater’s heating coil; a fan distributes the heated air throughout the space. Commonly used in industrial buildings because it is robust, can be controlled relatively quickly, and can be easily combined with central heat generators (e.g., boilers, heat recovery units, heat pumps).
Hot-air heating / Duct system (supply air heating, possibly as an HVAC system)
Heat is introduced into the supply air in a central unit (hot-air generator or ventilation unit) and distributed throughout the hall via air ducts and outlets. This system is particularly common because it can combine heating and air distribution (e.g., fresh air, filtration) into a single concept and is suitable for high air flow rates.
Ceiling radiant panels (water-based radiant heating)
Hot water circulates through large-surface-area ceiling panels; the heat is primarily emitted downward as radiation, thereby directly “warming” people, the floor, and building components (less air circulation, less temperature stratification than with pure air heating). Very popular in industrial and logistics halls because it can be comfortable, quiet, and efficient—especially at low system temperatures.
Industrial floor heating (pipe coils in the concrete slab)
Heating pipes are laid in the concrete floor slab; the floor surface acts as a large heat exchanger and distributes heat evenly. Well-known and proven, especially in new construction and major renovation projects, because it provides very robust, even heat distribution and works well with low flow temperatures; distribution typically occurs via multiple heating circuits.
Applications for industrial heating systems
Typical applications for industrial heating systems include large halls (production, warehousing, logistics) as well as locations with high internal heat loads and waste heat potential—such as when using radiant heaters and dark radiators. ONI system technology is particularly useful where you want to recover heat from existing processes and distribute it as needed via suitable hydraulics—even in conjunction with ventilation and process cooling.
Kunststoff- und Elektrotechnik GmbH
Kunststoff- und Elektrotechnik GmbH uses refrigeration systems from Oni-Wärmetrafo GmbH at its production site in Mönchweiler.
Heat recovery makes it possible to use waste heat from production as a heating source. This reduces the need for expensive primary energy and can significantly improve the overall efficiency of the facility’s heating system—especially when waste heat is generated continuously during operation or when cooling is performed simultaneously.
In large buildings, the proper design of the pump and distribution system, as well as the control system, determines whether heat is delivered quickly, consistently, and in line with demand (e.g., when doors open, zone usage changes, or load conditions fluctuate). This improves comfort, operational reliability, and energy efficiency.
