In modern cleanrooms, laboratories, and high-precision production environments, air quality directly impacts product safety and experimental accuracy. Equally important is the noise level and airflow comfort of the ventilation system. As a key terminal component, the HEPA Box (high-efficiency air supply outlet) plays a critical role in ensuring both clean air delivery and a comfortable working environment. This article provides a comprehensive analysis of HEPA Box noise control and airflow comfort to help customers make informed selection and application decisions.
1. Key Factors Affecting HEPA Box Noise
Noise is a common concern in cleanroom operations. Excessive noise not only reduces operator comfort but can also interfere with experiments or precision manufacturing. HEPA Box noise primarily originates from:
Fan and airflow noise: Turbulence as air passes through the filter and duct system
Outlet structure design: Uneven airflow or poorly designed outlets can create localized noise
Installation environment: Loose mounting or duct resonance can increase noise levels
Solutions include:
Optimizing duct and airflow design to minimize turbulence
Using high-quality materials and sealing components to reduce vibration noise
Pairing with low-noise fans or static pressure boxes to further reduce overall noise
2. Key Indicators of Airflow Comfort
Airflow comfort directly impacts operator experience and cleanroom stability. Important factors include:
Air velocity uniformity: Ensures consistent airflow across the workspace, avoiding strong or weak zones
Airflow direction control: Layered airflow design (vertical or horizontal laminar flow) for smooth, non-turbulent circulation
Temperature and humidity stability: Maintains comfortable and compliant environmental conditions in accordance with ISO/GMP standards
Design considerations:
Multi-perforated plates or diffusers to achieve uniform airflow
Adjustable outlet angles to suit different workbenches or equipment layouts
Integration with pressure sensors and airflow regulators for automatic balancing
3. Applications in Different Cleanroom Grades
| Cleanroom Grade |
Typical Application |
Noise & Comfort Requirements |
| ISO 5 / GMP A |
Injectable production, pathology operation zones |
Low noise, uniform airflow, operator comfort without disturbance |
| ISO 6 / GMP B |
High-risk pharmaceutical production, precision electronics |
Stable airflow, controllable direction, moderate noise |
| ISO 7 / GMP C |
Support production areas, buffer zones |
Moderate noise, comfortable airflow, maintains required cleanliness |
4. Key Considerations for HEPA Box Selection
When selecting a HEPA Box, customers typically focus on:
Noise level: Ensure operating decibel values meet lab or production requirements
Airflow uniformity: Ensure stable velocity and controllable direction
Installation compatibility: Outlet size and duct structure must match existing cleanroom systems
Material quality and durability: Stainless steel or aluminum frames for easy cleaning and long-term use
Maintenance convenience: Easy HEPA filter replacement ensures stable cleanroom operation
5. Conclusion
The HEPA Box is not only a key terminal for cleanroom air purification but also an essential factor for operator comfort. Low-noise design and uniform, controllable airflow significantly enhance work and production experience while ensuring ISO/GMP-level air cleanliness.
Choosing a HEPA Box that meets both noise and comfort requirements is vital for improving cleanroom efficiency, protecting personnel health, and ensuring product quality.
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