We are excited to announce that our enthalpy plate heat exchangers have officially obtained hygiene certification in line with VDI 6022, highlighting our ongoing commitment to safe, efficient, and sustainable ventilation technology.

🔍 Why is VDI 6022 important?

This European standard is among the most rigorous frameworks for HVAC hygiene. It establishes strict criteria for design, material selection, and cleanability — ensuring that ventilation components can be safely used in sensitive facilities such as healthcare centers, laboratories, educational institutions, and public buildings.

🧪 Internationally recognized hygiene compliance

Our EC-EX6 series has been tested and confirmed to meet multiple standards, including:

✅ 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)

📐 Benefits of certified enthalpy exchangers

With the ability to transfer both temperature and moisture, EC-EX6 exchangers create balanced indoor climates while maximizing energy efficiency. Certification guarantees that these advantages are delivered under strict hygiene and safety requirements.

♻️ Clean air as a principle

For us, certification is not just a milestone — it is a proof of our philosophy: innovation with responsibility. By achieving this recognition, ZERN ENGINEERING continues to support healthier, more sustainable building environments.

🔗 Discover more: Hygiene Test Certificate ZERN HU_HC_HS_HD_EC-EX6_EN.pdf

Effective energy recovery starts with ZERN ENGINEERING🔋