In high-load electronics manufacturing facilities, AHU/MAU systems often operate 24/7 under demanding conditions — where airflow stability, energy efficiency, and system reliability directly impact daily operations.

Recently, Beijing Hengrui supported an AHU retrofit evaluation project for a large electronics manufacturing facility, focused on upgrading traditional belt-driven fan systems to high-efficiency EC fan grid solutions.

In this project, the original AHU systems were designed with belt-driven centrifugal fans and AC asynchronous motors.

While this type of setup has been widely used for years, long-term industrial operation often exposes several limitations:

For facilities operating continuously, even small inefficiencies can translate into significant long-term operational costs.

Instead of redesigning the entire AHU structure, the retrofit focused on replacing the original fan systems with EC fan grid configurations using backward-curved EC centrifugal fans.

The objective was straightforward:

Maintain the original airflow and static pressure requirements while improving overall system efficiency and reducing maintenance complexity.

Target operating conditions included:

Pic.1 Pre renovation air conditioning unit nameplate

Performance Improement Results

Under equivalent operating conditions, the upgraded EC fan grid systems achieved significant reductions in power consumption while maintaining the original airflow and static pressure requirements.

Pic.2  Energy saving and consumption reducing effect

♦ Beyond Energy Saings

The biggest improvement wasn’t just lower power consumption.

The EC fan grid solution also helped improve:

✔ airflow controllability

      ✔ maintenance accessibility

      ✔ system cleanliness

      ✔ operational stability

      ✔ long-term reliability for continuous industrial operation

And because the system uses multiple EC fans instead of a single belt-driven structure, maintenance flexibility and redundancy are also significantly improved.

♦ Why More Industrial Facilities Are Re-Ealuating HVAC Systems

Across electronics manufacturing and other high-load industrial environments, more facilities are beginning to realize that HVAC systems are no longer just utility infrastructure.

They directly affect:

        • operational cost,

        • maintenance workload,

        • energy efficiency,

        • and long-term production stability.

Especially as energy costs continue rising, EC retrofit projects are becoming an increasingly practical approach to modernizing existing AHU systems without complete system replacement.

♦ Let’s Exchange Insights

Are traditional AHU systems still creating energy or maintenance challenges in your facility?

We’d be interested to hear how others are approaching:

EC fan retrofit projects,airflow optimization,or HVAC energy reduction in high-load manufacturing environments.

And if you're currently evaluating  AHU upgrades or fangrid retrofit solutions, feel free to connect — always happy to exchange practical insights from real industrial projects.