The following places or scenarios in Germany have significant demand for ERV (Energy Recovery Ventilation) systems:

‌Residential buildings‌

German detached houses often combine ERV systems with heating systems to recover heat or cold from exhaust air and improve energy efficiency. 

Especially during winter heating, ERV can reduce heat loss and maintain indoor comfort.

Public and historical buildings‌

Historical buildings such as the German Reichstag use fresh air systems with regional intelligent control (such as BlauAir units). ERV technology can 

optimize air quality and reduce energy consumption to meet the ventilation needs of large spaces.

Commercial and industrial facilities‌

Hotels, factories, schools and other places use ERV systems to balance ventilation and energy consumption. For example, Germany's Blau's ERV fans 

are used in hotel air conditioning, photovoltaic inverter cooling and other scenarios to meet the requirements of large air volume and high static pressure.

Precision environment and green building‌

Precision air-conditioning environments that require constant temperature and humidity (such as laboratories or data centers) use ERV systems to ensure 

stable airflow; green buildings use ERV to achieve low-carbon ventilation in line with German environmental protection standards.

In summary, the ERV system covers residential, public buildings, industrial and commercial, and technology-intensive scenarios in Germany, taking into account 

both air quality and energy sustainability.