Efficient retrofit modernisation of ventilation systems with innovative technology.
We modernise existing ventilation systems with state-of-the-art ebm-papst fans and suitable control technology. This allows you to permanently reduce your energy costs, increase operational reliability and extend the service life of your existing systems.
Why retrofitting your systems is worthwhile.
increase in efficiency
Through targeted retrofitting, we get the most out of existing ventilation and system components – energy-efficient, controllable and sustainable.
Extension of service life
Modern fans and drive technology significantly extend the service life of your systems without the need for a complete replacement.
Customised solutions
Our modernisation concepts are tailored to your plant – from individual measures to complete retrofit modernisation.
Modernize old systems and reduce operating costs
Retrofitting is the retrofitting or conversion of refrigeration, air conditioning or ventilation systems.
We modernise your old systems and ensure noticeable energy savings. By replacing old fans with energy-efficient ebm-papst EC fans, we reduce your operating costs.
One important aspect is that almost every retrofit project is eligible for funding. Germany provides funding that is not being utilised.
It is therefore all the more worthwhile to subject your system to an energy-efficient refurbishment.
The systems to be modernised include air conditioning systems, refrigeration systems, chillers, cooling towers and many other systems in which fans play a crucial role.
Significantly lower energy costs compared to the existing plant.
Often an eligible measure without having to interfere with the building structure.
Conversion possible in many cases during ongoing operations.
We offer you everything from a single source.
From inventory and design to commissioning of your modernised ventilation system.
Initial assessment and consulting
We provide you with an initial assessment based on the data from the device cards, type plates or inventories that have already been carried out.
Alternatively, you can send us the data collection form you have completed.
Measurement
To determine the actual operating point, which often deviates from the original design, we carry out an assessment of the existing system. In addition to the air flow rate, the electrical power consumption of the fan is measured, enabling an accurate calculation of the return on investment (ROI).
Design
Based on the data and your future requirements, we will design the new fans for you. In addition to the fans, we also offer other services required for a retrofit, such as pressure bulkheads, control cabinets including MSR technology, and installation services.
Commissioning and documentation
Commissioning and documentation: Every project concludes with commissioning, including documentation and audit records. We will provide you with an overview of all measured data for the old and new fans, clearly showing the energy savings and system optimisation achieved.
Do you have any questions or would you like some advice?
We are happy to answer any questions you may have and will use your data to assess whether a retrofit is worthwhile.
Our extended retrofit services.
Technical focus areas in retrofitting.
In addition to simply replacing the fan, we consider the interaction between drive technology, control systems, safety technology and documentation. This results in a retrofit solution that is both technically and economically convincing.
Control system modernization (PLC, HMI, remote maintenance)
Upgrading outdated control systems with modern PLC solutions and operating panels. Implementation of remote maintenance concepts for efficient maintenance.
– Migration to the latest automation hardware
– Modernization of user interfaces (HMI)
– Connection to higher-level control systems
Drive technology (motors, frequency converters)
Energy-efficient conversion to modern drive solutions with higher efficiencies and optimized control technology.
– IE3/IE4 efficient motor solutions
– Frequency inverters for optimum speed control
– Servo drives for precise positioning
Safety technology (safety control, emergency stop)
Adaptation to current safety standards in accordance with the Machinery Directive and standards such as EN ISO 13849.
– Modernization of emergency stop systems
– Safety controllers with PL d/e
– Electro-sensitive protective equipment
Documentation & CE
Complete documentation in accordance with the Machinery Directive and CE Declaration of Conformity for modernized systems.
– Technical documentation in accordance with current standards
– Carrying out risk assessments
– Drawing up the declaration of conformity
Project planning & commissioning
Complete support from conception to commissioning, including staff training.
– Individual project planning
– Implementation by experienced technicians
– Functional testing and acceptance on site
Case studies – retrofitting in practice
Selected projects demonstrate the savings and effects that can be achieved through consistent retrofitting.
‘I’m getting every last bit out of the system.’
The initial situation was an older system with high power consumption and limited controllability. After converting to modern EC fans with demand-based control, energy consumption was significantly reduced – without interfering with the building structure.
Retrofit fans – the key to greater energy efficiency
Fans play a key role in the retrofitting of ventilation systems because they directly influence energy efficiency, air quality and operating costs.
Here are the most important aspects:
1. Energy efficiency
- New fans are infinitely variable, enabling volume flow to be adjusted as required (e.g. CO₂ or humidity-controlled regulation).
- This makes systems not only more efficient, but also more convenient to operate.
2. Controllability and flexibility
- Old systems often use outdated centrifugal fans with low efficiency.
- Modern fans (e.g. EC fans with electronically commutated motors) achieve significantly higher efficiency levels and considerably reduce power consumption.
- When retrofitting, replacing equipment with more efficient models often offers the greatest potential for savings.
3. Space and installation conditions
- Retrofit solutions usually take into account that the existing system will continue to be used.
- Therefore, there are plug-and-play fans that can be installed in existing housings.
- More compact designs are also available, which is particularly advantageous in confined technical centres.
4. Reliability
- Fail-safe operation through redundancy
- Design with desired power buffer or installation of blanking covers for retrofitting additional fans, should higher air flow rates be required in the future.
5. Plant performance
- The replacement allows volume flows and pressure ratios to be better maintained or adjusted.
- This means that heat recovery systems or higher-class filters can also be operated retrospectively without overloading the fan.
6. Noise generation
- New fan models are usually quieter thanks to optimised impellers and airflow.
- This is particularly relevant for retrofits in office buildings, schools or hospitals.
7. Operating costs and maintenance
- Lower power consumption reduces running costs.
- Modern EC fans require less maintenance than older belt or asynchronous motor solutions.
- Monitoring and diagnostic tools (e.g. via bus system) can be integrated.
| criterion | Old fan (existing) | Retrofit fan (new, e.g. EC) |
|---|---|---|
| efficiency | 40–60% | 70–85% |
| motor | Asynchronous motor, usually with belt drive | EC motor (directly on the impeller), highly efficient |
| Controllability | Only step switching or throttling | Stepless, integrated speed control |
| energy consumption | High, as often designed for full load | Savings of up to 30–50% possible |
| Geräuschentwicklung | Higher (belt, unfavorable flow) | Significantly quieter thanks to optimized impellers |
| Space requirement | Larger, additional drive components | Compact, directly in the air flow |
| Maintenance | Belt change, bearing maintenance, more effort | Low, beltless and durable bearings |
| Control / Monitoring | Analog, hardly any diagnostic options | Can be integrated digitally (bus systems, remote monitoring) |
| Service life | Rather shorter, high wear | Longer service life, stable performance |
| Retrofitting functions | Limited customizability | Efficient filter/heat recovery possible thanks to higher pressure build-up |
Your Retrofit contacts
