A leading electronics R&D and manufacturing facility in Sichuan, China, recently faced a common but increasingly critical challenge in industrial cooling system performance:

The existing air handling unit (AHU), based on traditional AC fan configuration, was no longer able to meet the evolving requirements of higher equipment density and dynamic thermal loads.

♦ The Challenge:Declining Cooling Stability in a High-Density Environment

As production demands increased, several system limitations became more pronounced:

Although the system was still operational, its performance margin had significantly decreased—raising concerns about long-term reliability and process stability.

This type of issue is increasingly common in industrial facilities, electronics manufacturing plants, and data-center-like environments, where thermal loads continue to rise.

Pic.1  Scene shooting before renovation

Instead of a full system replacement, the project adopted a targeted retrofit approach:

Converting the traditional AHU into a modular fan wall configuration

This upgrade strategy enabled:

At the core of the solution, EC fans from ebm-papst were implemented to provide:

Beyond replacing hardware components, the success of the retrofit depended on system-level engineering optimization, including:

This step is critical in any AHU retrofit, fan wall upgrade, or industrial ventilation modernization project, where theoretical design must align with real-world airflow behavior.

   • After implementation, the upgraded system achieved:

Most importantly, the retrofit extended the lifecycle of the existing infrastructure—avoiding the cost and downtime of a full system replacement.

Pic.2  Comparison before and after renovation

This case highlights a practical reality:

Effective cooling upgrades are not just about better products—but about how they are selected and integrated into the system.

Beijing Hengrui focuses on application-driven optimization of ventilation and cooling systems, combining fan selection expertise with system-level understanding.

Our work goes beyond component replacement—addressing how airflow dynamics, control strategy, and system architecture interact in real operating environments.

For projects where standard solutions no longer deliver expected performance, exploring a tailored retrofit strategy is often the most effective next step.