Core Functions Of High-Efficiency FFU (Fan Filter Unit) Laminar Air Flow

Core Functions of High-Efficiency FFU (Fan Filter Unit)

A high-efficiency FFU (Fan Filter Unit) is a self-powered, modular air supply terminal unit with high-efficiency filtration, widely used in environments requiring extremely high air cleanliness. Its core functions and working principles are as follows:

Core Functions

1. ‌High-Efficiency Filtration‌
   FFUs are typically equipped with HEPA or ULPA high-efficiency filters, achieving filtration efficiency levels of H13/H14 (99.97%+ for 0.3-micron particles). Some models support multi-stage filtration (e.g., pre-filter + HEPA + activated carbon) to address dust, chemical pollutants, etc.

2. ‌Intelligent Control‌

   • Supports remote monitoring, allowing adjustment of fan speed and filter life checks;
   • Automatically adjusts operation modes based on sensor data (e.g., PM2.5);
   • Features timer functions for energy savings.

3. ‌Energy Efficiency & Low Noise‌

   • Uses advanced EC motors, reducing energy consumption by 30–50% compared to traditional motors;
   • Optimized airflow design keeps noise levels at 55–65 dB (with optional silencers).

Working Principle

FFUs draw air from the top, filter it through high-efficiency filters, and deliver clean laminar airflow at a uniform speed of 0.45 m/s ±20%, creating a localized unidirectional clean zone. Their modular design allows flexible assembly to meet varying cleanliness requirements (e.g., Class 100, 1000 cleanrooms).

Typical Applications

• ‌High-cleanliness environments‌: Semiconductor production lines, biosafety labs, operating rooms;
• ‌Flexible renovation scenarios‌: Facilities requiring frequent clean area adjustments or with limited ceiling height;
• ‌Localized purification needs‌: Clean benches, clean booths, etc