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ZERN ENGINEERING™
by Blauberg Ventilatoren GmbH
Stäblistraße 6.
81477, Munich, Germany
| ZERN ENGINEERING achieved Hygiene Certification VDI 6022 |
We are proud to announce that our plate heat exchangers have officially passed VDI 6022 certification, demonstrating our commitment to maintaining the highest hygiene and safety standards in ventilation technology.
🔍What is VDI 6022, and why does it matter?
VDI 6022 is one of the most comprehensive European standards for ensuring hygienic air quality in HVAC systems. It sets strict requirements for the design, materials, cleanability and microbiological safety of ventilation components used in sensitive environments such as hospitals, schools and public buildings.
🧪 Certified according to multiple international hygiene standards:
Our testing and validation covered compliance with the following standards:
✅ VDI 3803, sheet 1 (05/2020)
✅ DIN 1946, part 4 (09/2018)
✅ ÖNORM H 6020 (03/2024)
✅ ÖNORM H 6021 (01/2023)
✅ SWKI VA104-01 (01/2019)
✅ SWKI VA105-01 (08/2015)
These validations confirm that our solutions meet the highest hygiene standards, reinforcing their suitability for health-critical applications across a wide range of building environments.
📐Why these methods are important?
Conformity with multiple standards means our products have been assessed from different regional and methodological perspectives, ensuring:
– Compatibility with various national building codes.
– Reliable protection against microbial growth.
– Long-term hygienic performance with low maintenance effort.
♻️ Why it matters?
This certification is more than just a label – it reflects our commitment to continuous improvement and our alignment with international quality standards.
At ZERN ENGINEERING, we believe that innovation must go hand in hand with responsibility, and we are dedicated to moving forward, not standing still.
🔗 Welcome to explore more
✉️ If you have any questions, don’t hesitate to reach out
Thank you for trusting ZERN ENGINEERING.
Effective solutions for energy recovery.
| Rotary heat exchangers – a smart step toward the future of ventilation |
As HVAC systems evolve to meet growing demands for energy efficiency, indoor air quality, and sustainability, choosing the right heat recovery technology becomes a strategic decision. Rotary heat exchangers continue to play a vital role in many modern ventilation applications — thanks to their versatility and well-balanced performance.
Why rotary heat exchangers?
✅ Dual energy recovery – transfers both sensible heat and moisture for improved indoor comfort (when using enthalpy or sorption rotors)
✅ Stable in cold climates – less prone to frost formation compared to plate exchangers
✅ Compact & adaptable – space-saving design with controllable rotor speed and purge options
✅ Humidity control – helps maintain comfortable indoor humidity levels in winter
💡 Rotary heat exchangers come in several types, each suited to different project needs:
🔸 Compared to other technologies
Where rotary heat exchangers work best?
🏢 Commercial and office buildings – year-round ventilation with improved comfort and humidity balance
🌡 Cold climates – frost-resistant operation with consistent energy recovery
🛠 Compact AHUs – perfect for tight spaces
🏭 Industrial and mixed-use facilities – ideal for high-demand and continuous-use systems
🔄 Demand-based systems – dynamic control over rotor speed and purge sectors for seasonal adjustment
⚖️ Efficiency alone isn’t everything
While plate exchangers may excel in dry heat transfer, rotary heat exchangers offer greater adaptability — combining energy savings, humidity control, and operational stability in one compact solution.
At ZERN ENGINEERING, we design and manufacture rotary heat exchangers that support the next generation of smart, efficient, and resilient ventilation systems.
Let’s engineer the air — efficiently.
| Introducing the HU-EX6 450 heat exchanger by ZERN ENGINEERING! |
🔧 Introducing the HU-EX6 450 by ZERN ENGINEERING – a heat exchanger with compact size, optimized geometry for big results.
Created for integration into slim and compact air handling units, it delivers exceptional performance through its precisely optimized internal geometry.
📐 Dimensions: width – 270 mm, height – 450 mm, depth: 100–600 mm
🌬 Airflow capacity: up to 700 m³/h
♻️ Thermal efficiency: up to 93%
⚙️ Casing: aluminum or aluzinc (optionally with T-profile)
🔹 Why HU-EX6 450 stands out:
– maximum heat recovery with minimal pressure drop
– internal geometry fine-tuned for compact systems
– perfect match for flat and space-saving ventilation units
-consistent performance, even under variable operating conditions
With the HU-EX6 450, space is no longer a limitation. It’s the go-to choice for manufacturers seeking efficiency, reliability and a perfect fit for modern ventilation systems.
📄 Learn all the details about our product here .
