Zern Engineering

26/08/2026

ZERN ENGINEERING HU-EX6 533 - high-capacity heat recovery for commercial systems🏢🏣

Larger residential or commercial spaces demand higher airflow capacity - without compromising thermal efficiency. To address this, we expanded our high-performance counter-flow range with the HU-EX6 533 series, engineered specifically for systems handling up to 1550 m³/h.

Here is how the HU-EX6 533 advances commercial AHU design:
🔸 Commercial-grade capacity. Designed with an enlarged 758 × 533 mm footprint to handle larger volumetric airflows smoothly;
🔸 Uncompromised efficiency. Reaches up to ~90% heat recovery under peak operation while maintaining low aerodynamic resistance;
🔸 Flexible casing specs. Available in aluzinc and aluminum configurations (including T-profile design) with depths ranging from 100 to 600 mm;
🔸 Refined manufacturing. Produced using our upgraded plate manufacturing process, offering consistent precision and shortened delivery times.

By focusing on smart engineering and modern production technologies, we continue to supply components that raise the efficiency standard for commercial indoor air quality.

💡Download the technical data sheet and pressure drop diagrams:https://zern-engineering.com/download/ZERN_HU-EX6%20533_leaflet_2026_07_EN-127.pdf
📱For any questions or further information, feel free to contact us: https://zern-engineering.com/contacts/

12/08/2026

📐 ZERN ENGINEERING introduces HU-EX6 394 - new plate geometry 📐

Higher thermal performance usually means higher pressure drop. Our new plate geometry breaks that trade-off - while a redesigned manufacturing process cuts lead times too.

Designed for residential and light commercial Air Handling Units (up to 1,000 m³/h), the HU-EX6 394 introduces a complete overhaul in internal geometry and manufacturing technology:
▫️ Up to ~90% heat recovery efficiency. Optimized plate design ensures maximum heat transfer under peak operating conditions;
▫️ Reduced pressure drop. Redesigned airflow channels minimize resistance, lowering total fan energy consumption;
▫️ Seamless AHU integration. Standardized footprint (619 × 394 mm) with customizable depths from 100 to 600 mm, available in Aluzinc and Aluminum casing options;
▫️ Enhanced manufacturing precision. Advanced production technology guarantees consistent quality and significantly shorter lead times for high-volume orders.

We continue to focus on smart engineering and continuous technological evolution to provide heat recovery solutions that empower unit manufacturers worldwide.

💡Explore technical specifications and pressure drop performance diagrams in our product leaflethttps://zern-engineering.com/download/ZERN_HU-EX6_394_leaflet_2026_07_EN-124.pdf
📲 If you have any questions or need additional information, please feel free to get in touch https://zern-engineering.com/contacts/

16/07/2026

Why membranes matter in modern enthalpy heat exchangers

Indoor air quality depends not only on temperature but also on humidity levels. Excessively dry air can cause discomfort, irritation of the respiratory system, and increased sensitivity to allergens, while excessive humidity may promote condensation and mold growth. This is why enthalpy heat exchangers are becoming increasingly popular in modern energy recovery ventilation (ERV) systems.
The key component that distinguishes an enthalpy heat exchanger from a sensible heat exchanger is the membrane. This specialized polymer membrane allows water v***r to pass through while keeping the supply and exhaust air streams separated. As a result, both heat recovery and moisture transfer occur simultaneously, helping maintain a comfortable and healthy indoor environment throughout the year.

Features of polymer membranes

Benefits of membrane-based enthalpy heat exchangers include:
1. Recovery of both sensible and latent energy;
2. Improved indoor humidity control;
3. Reduced risk of excessively dry indoor air during winter;
4. Enhanced occupant comfort and well-being;
5. Easy maintenance and cleanability

A high-performance polymer membrane is designed to selectively transfer water v***r while maintaining an effective barrier between the supply and exhaust air streams. This enables efficient humidity recovery without transferring contaminants, particles, or odors, helping to maintain excellent indoor air quality. As a result, enthalpy heat exchangers can provide both energy recovery and humidity control, contributing to a healthier and more comfortable indoor environment.
Unlike traditional cellulose-based materials, modern polymer membranes are resistant to moisture-related degradation and do not support the growth of mold, fungi, or bacteria. This makes them a reliable and hygienic solution for long-term operation in residential buildings, offices, schools, healthcare facilities, and other applications where indoor comfort and air quality are priorities.
In addition, polymer membranes are easy to maintain, can be cleaned and washed, and help ensure stable performance throughout the service life of the heat exchanger.

Key selection criteria for efficient polymer membranes

When evaluating membrane technology, several factors should be considered:
• Moisture transfer efficiency;
• Hygiene and resistance to microbial growth;
• Air-tight separation of supply and exhaust air streams;
• Durability and ease of maintenance.
By combining heat recovery and humidity recovery in a single device, membrane-based enthalpy heat exchangers help improve indoor air quality, reduce HVAC energy consumption, and create healthier indoor spaces. As buildings become more energy efficient and airtight, advanced polymer membrane technology will continue to play a crucial role in the future of sustainable ventilation systems.

02/07/2026

How proper ventilation protects against allergies and urban dust?

As urban populations continue to grow, people are increasingly exposed to airborne pollutants such as vehicle emissions, fine particulate matter (PM2.5), dust, and seasonal pollen. Maintaining high indoor air quality is no longer just a comfort issue - it has become an essential part of creating healthy indoor environments for homes, offices, schools, and public buildings.

For allergy sufferers, indoor air quality is particularly important. During peak pollen seasons, opening windows may allow large amounts of allergens to enter a building. Modern mechanical ventilation systems equipped with efficient air filtration help reduce exposure to pollen, dust, and other airborne irritants while ensuring a continuous supply of fresh air.

How ventilation systems are useful in our time

Key benefits of modern ventilation systems include:

- Reduced exposure to pollen and allergens;
- Removal of fine particulate matter (PM2.5 and PM10);
- Improved indoor air quality and occupant comfort;
- Continuous supply of fresh, filtered outdoor air.

While filtration protects occupants from pollutants, energy recovery ventilation provides an additional advantage. Air-to-air heat exchangers recover thermal energy from the exhaust air stream and transfer it to the incoming fresh air. This allows buildings to maintain healthy ventilation rates without the energy losses typically associated with conventional ventilation or open windows.

Maximum effect due to the combination of filtration and heat recovery

Why combine filtration with air-to-air heat recovery?

1. Continuous supply of filtered fresh air.
2. Reduced ingress of allergens and urban pollution.
3. Lower heating and cooling energy consumption.
4. Improved comfort throughout the year.

Modern plate and rotary heat exchangers play a key role in energy recovery ventilation systems, helping building owners achieve both high indoor air quality and energy efficiency. For people living in polluted urban areas or suffering from seasonal allergies, this combination provides a practical and sustainable solution for creating healthier indoor spaces.

25/06/2026

A massive leap ahead! ⭐️ As part of Blauberg Engineering, we are thrilled to combine our expertise in heat exchangers with top components. Onward and upward! 💫💫💫

Introducing BLAUBERG ENGINEERING - the new global component business unit of Blauberg Group! 🎉🍾🥳

We are proud to announce the launch of BLAUBERG ENGINEERING - a new business unit that consolidates all component businesses together under "one umbrella", creating platforms for the development, production and supply of high-efficiency components worldwide.

Our expertise is now more accessible than ever, thanks to the synergy of three powerful brands:

🔹 Blauberg Motoren is a global manufacturer of high-performance EC and AC motors, fans and air-moving solutions for residential, commercial and industrial applications. Combining German engineering expertise with international manufacturing capabilities, the company delivers innovative, energy-efficient products to customers worldwide.
🔹 ZERN ENGINEERING is a full-cycle manufacturer with over 15 years of experience in the field of energy-efficient ventilation technologies.
Company specialize in the development and production of counter-flow, cross-flow, enthalpy and rotary air-to-air heat exchangers.
Their solutions have been in operation for years, ensuring consistent quality, energy efficiency and reliability in every project.
🔹 Storge is a automation company focused on the development and manufacture of intelligent control systems for ventilation, air quality management and energy-efficient HVAC applications.

Our strategy is to develop components that help build stronger residential, commercial and industrial systems - more energy-efficient, reliable and ready for the challenges of the future. We combine manufacturing expertise, engineering precision and world-class quality standards to provide our partners with reliable components that support long-term performance, efficiency and technological progress.

Our solutions support a wide range of applications:

✅ HVAC - AHU, MVHR / HRV / ERV, advanced cooling (DX systems, fan coils), heat pumps and precision humidification.
✅ Commercial refrigeration - industrial chillers, hydraulic circuits and bespoke cooling plants for large-scale facilities.
✅ Data centers - strict climate control and precision cooling for critical IT infrastructure.
✅ Agriculture and livestock - advanced microclimate systems optimized for farming and greenhouses.
✅ Environmental control for the textile industry, industrial drying /dehumidification, and heavy-duty cooling for electrical transformers.
✅ Climate control for transport, thermal management for EV charging stations, and other compact solutions.

👉 Follow our page to stay updated on our innovations.
This is only the beginning!
We are engineered to move the future!💪

05/06/2026

The solutions we create today shape the world we will live in tomorrow 🌿
At ZERN ENGINEERING, we believe that innovation, efficiency, and environmental responsibility should work together in every project.

28/05/2026

How to choose the right heat exchanger type?

A heat exchanger for ventilation systems (recuperator) is designed to recover heat from exhaust air and transfer it to incoming fresh air, improving energy efficiency and reducing heating and cooling costs. These systems are widely used in HVAC applications, air handling units (AHUs), and industrial ventilation systems, helping maintain indoor comfort while lowering overall energy consumption.

Ventilation heat exchangers are typically divided into two main groups:

1. Plate heat exchangers – fixed-core units with no moving parts
2. Rotary heat exchangers – rotating-wheel units enabling continuous heat transfer

Each group includes several subtypes depending on airflow configuration and functionality.

Plate heat exchangers

Plate heat exchangers operate by passing two separate air streams through adjacent channels, where heat is transferred through the plate material without mixing the airflows.

Plate heat exchangers are classified into:

- Sensible counter-flow heat exchangers – transfer heat only
- Enthalpy counter-flow heat exchangers – transfer both heat and moisture
- Sensible cross-flow heat exchangers – transfer heat only
- Enthalpy cross-flow heat exchangers – transfer both heat and moisture

Rotary heat exchangers

Rotary heat exchangers use a rotating wheel that continuously absorbs heat from the exhaust air and transfers it to the supply air stream.

Rotary heat exchangers are classified into:

1. Condensing (sensible) rotors – transfer heat, with possible condensation and re-ev***ration
2. Enthalpy rotors – transfer both heat and moisture using a hygroscopic surface
3. Sorption rotors – use advanced materials for enhanced humidity transfer

Which type of heat exchanger to choose?
When choosing between plate and rotary heat exchangers, the application is the key factor.

Plate heat exchangers are preferred where complete separation of airflows is required, such as in hospitals, laboratories, and clean environments.

Rotary heat exchangers are suitable for offices, shopping centers, and industrial facilities, where high efficiency and compact design are priorities.

Enthalpy solutions are recommended when humidity control is important, especially in cold or dry climates.

Choosing the right heat exchanger ensures optimal performance, compliance with indoor air quality requirements, and long-term HVAC system reliability.

20/05/2026

How rotary heat exchangers improve HVAC efficiency

Rotary heat exchangers (rotary heat recovery wheels) are widely used in modern ventilation systems to improve energy efficiency. They transfer heat between exhaust and supply air streams, reducing heating and cooling demand. In HVAC applications such as offices, retail, and industrial facilities, rotary heat exchangers are valued for their compact design and stable performance.

The working principle is straightforward. A slowly rotating wheel made of corrugated metal passes through two air streams. It absorbs heat from the exhaust air and releases it to the incoming fresh air. In enthalpy rotary heat exchangers, moisture transfer is also possible, helping maintain indoor humidity and reducing load on air conditioning systems.

Advantages and limitations

Key advantages of rotary heat exchangers include:

- High heat recovery efficiency (up to 85–90%)
- Compact size compared to plate heat exchangers
- Ability to transfer both sensible and latent heat
- Reduced risk of frosting in cold climates

At the same time, rotary heat exchangers have a known limitation - air carryover. A small portion of exhaust air can transfer to the supply side due to rotation and leakage. In most HVAC applications this is negligible, but it should be considered during system design.

Selection and applications

When selecting a rotary heat exchanger, consider:

1. Airflow balance and pressure drop
2. Type of application and air quality requirements
3. Need for humidity recovery (enthalpy vs sensible)
4. Measures to reduce carryover (purge sector, sealing, pressure control)

Rotary heat exchangers are widely used in offices, shopping centers, hotels, and industrial ventilation systems where high energy efficiency and compact design are important. In healthcare ventilation systems, they are typically applied only in non-critical areas such as corridors, administrative spaces, waiting zones, and general wards with no strict air purity requirements. For operating rooms, isolation zones, or laboratories, systems with complete air separation such as run-around coil (glycol) systems are typically used.

Used in the right context, rotary heat exchangers provide an effective balance between energy efficiency, size, and operating cost, making them a practical choice for many energy-efficient HVAC systems.

14/05/2026

Hygienic safety is an important criterion when choosing a heat exchanger☝🏻

Polystyrene and enthalpy heat exchangers ZERN ENGINEERING are compliant with VDI 6022 Hygiene Certification requirements, confirming their suitability for safe use in ventilation systems.

We help create healthier indoor environments with ventilation solutions designed to meet hygienic standards✅

12/05/2026

Aquatherm Kyiv 2026 has officially started! ✨
ZERN ENGINEERING is presenting engineering solutions for ventilation and climate systems for modern commercial and industrial projects 🏭
Artem Pinchuk and Ivan Chmyrenko are pleased to welcome visitors at 📌stand 1C-C-25 and will be happy to answer all your questions.
We look forward to seeing you at IEC Kyiv! 😊