FFU Applications: Essential Clean Air for Medical, Semiconductor & Electronics Facilities

Fan Filter Units (FFUs) are modular, self-powered, end-point air purification devices critical for maintaining stringent air quality in controlled environments. They draw air in from the top, pass it through integrated filters, and deliver uniformly filtered air downward. But where are FFUs most commonly used?

Key Industries & Applications for FFUs:

1. Medical Cleanrooms: Hospitals, pharmaceutical manufacturing, labs, sterile compounding areas, operating theaters (where ISO Class 5 or higher is often required).

2. Semiconductor Fabrication (Fabs): Wafer processing, photolithography areas, assembly cleanrooms (demanding ultra-low particle counts - ULPA filters common).

3. Electronics Manufacturing: PCB assembly, microelectronics, component production (requiring stable, particle-free environments).

4. Flat Panel Display (FPD) Production: LCD, OLED manufacturing lines (sensitive to contaminants impacting yield).

5. General Cleanrooms & Clean Zones: Modular cleanrooms, clean workstations, isolators, research labs, aerospace assembly, food & beverage processing (anywhere precise air control is vital).

FFU Core Components Explained:

An FFU integrates several key elements:

1. Housing: Constructed from materials like cold-rolled steel with baked paint (G), stainless steel (S), or aluminum alloy (A), chosen for environment and corrosion resistance. Shapes include sloped top (optimized airflow) or rectangular (maximizes filter surface area).

2. Prefilter (Optional - P): Protects the main filter from large debris (e.g., construction dust). Often made of washable polyurethane foam.

3. Fan & Impeller: Centrifugal fans with forward-curved (better particle removal) or backward-curved (lower energy/noise) impellers. Powered by AC (A1/A3) or more efficient DC brushless (EC) motors.

4. Main Filter: High-Efficiency Particulate Air (HEPA - H) or Ultra-Low Penetration Air (ULPA - U) filter, capturing particles as small as 0.1-0.5µm.

5. Control System: Ranges from simple multi-speed switches to sophisticated computer-controlled systems enabling single unit, multi-unit, or zone control, plus monitoring and alarms.

How FFUs Work:
The internal fan draws air through the housing. Air first passes an optional prefilter, then through the HEPA/ULPA filter. Filtered clean air is distributed uniformly across the entire discharge area at a controlled velocity (typically target: 0.45 m/s ±20%).

Critical FFU Performance Parameters:
Parameter	Typical Range/Value	Importance
Face Velocity	0 - 0.6 m/s (Adjustable)	Key cleanroom parameter; affects particle removal & containment.
Power Consumption	AC: 100-300W; DC: 50-220W (30-50% less than AC)	DC offers significant energy savings (OPEX).
Velocity Uniformity	Max/Min deviation ≤ ±20% from average (tested at 6-12 points)	Crucial for avoiding turbulence in high-grade cleanrooms.
External Static Pressure (ESP)	≥ 90 Pa (at 0.45 m/s face velocity)	Indicates ability to overcome duct resistance; impacts fan life.
Total Static Pressure (TSP)	AC: ~300 Pa; DC: 500-800 Pa (Max power, zero flow)	TSP = ESP + Filter Pressure Drop. Higher TSP offers more system flexibility.
Noise Level	42 - 56 dB(A) (Measured at 0.45m/s, 100Pa ESP)	DC units typically 1-2 dB(A) quieter than comparable AC. Critical for comfort.
Vibration	< 1.0 mm/s	Minimizes potential disturbance in sensitive processes News Details Home > News > Company News About-FFU Applications: Where are Fan Filter Units Used? (Medical, Semiconductors & More) Events News Cases FFU Applications: Where are Fan Filter Units Used? (Medical, Semiconductors & More) 2025-05-29 FFU Applications: Essential Clean Air for Medical, Semiconductor & Electronics Facilities Fan Filter Units (FFUs) are modular, self-powered, end-point air purification devices critical for maintaining stringent air quality in controlled environments. They draw air in from the top, pass it through integrated filters, and deliver uniformly filtered air downward. But where are FFUs most commonly used? Key Industries & Applications for FFUs: Medical Cleanrooms: Hospitals, pharmaceutical manufacturing, labs, sterile compounding areas, operating theaters (where ISO Class 5 or higher is often required). Semiconductor Fabrication (Fabs): Wafer processing, photolithography areas, assembly cleanrooms (demanding ultra-low particle counts - ULPA filters common). Electronics Manufacturing: PCB assembly, microelectronics, component production (requiring stable, particle-free environments). Flat Panel Display (FPD) Production: LCD, OLED manufacturing lines (sensitive to contaminants impacting yield). General Cleanrooms & Clean Zones: Modular cleanrooms, clean workstations, isolators, research labs, aerospace assembly, food & beverage processing (anywhere precise air control is vital). FFU Core Components Explained: An FFU integrates several key elements: Housing: Constructed from materials like cold-rolled steel with baked paint (G), stainless steel (S), or aluminum alloy (A), chosen for environment and corrosion resistance. Shapes include sloped top (optimized airflow) or rectangular (maximizes filter surface area). Prefilter (Optional - P): Protects the main filter from large debris (e.g., construction dust). Often made of washable polyurethane foam. Fan & Impeller: Centrifugal fans with forward-curved (better particle removal) or backward-curved (lower energy/noise) impellers. Powered by AC (A1/A3) or more efficient DC brushless (EC) motors. Main Filter: High-Efficiency Particulate Air (HEPA - H) or Ultra-Low Penetration Air (ULPA - U) filter, capturing particles as small as 0.1-0.5µm. Control System: Ranges from simple multi-speed switches to sophisticated computer-controlled systems enabling single unit, multi-unit, or zone control, plus monitoring and alarms. How FFUs Work: The internal fan draws air through the housing. Air first passes an optional prefilter, then through the HEPA/ULPA filter. Filtered clean air is distributed uniformly across the entire discharge area at a controlled velocity (typically target: 0.45 m/s ±20%). Critical FFU Performance Parameters: Parameter Typical Range/Value  Importance Face Velocity 0 - 0.6 m/s (Adjustable) Key cleanroom parameter; affects particle removal & containment. Power Consumption AC: 100-300W; DC: 50-220W (30-50% less than AC) DC offers significant energy savings (OPEX). Velocity Uniformity Max/Min deviation ≤ ±20% from average (tested at 6-12 points) Crucial for avoiding turbulence in high-grade cleanrooms. External Static Pressure (ESP) ≥ 90 Pa (at 0.45 m/s face velocity) Indicates ability to overcome duct resistance; impacts fan life. Total Static Pressure (TSP) AC: ~300 Pa; DC: 500-800 Pa (Max power, zero flow) TSP = ESP + Filter Pressure Drop. Higher TSP offers more system flexibility. Noise Level 42 - 56 dB(A) (Measured at 0.45m/s, 100Pa ESP) DC units typically 1-2 dB(A) quieter than comparable AC. Critical for comfort. Vibration < 1.0 mm/s  Minimizes potential disturbance in sensitive processes +8613924524152 Quick link Home About Us products Video news Cases Contact Us Quick Contact Address Shishan Industry Zone C Park, Nanhai Town, Foshan City, Guangdong Province,P.R. China. Tel 86-757-86689889 E-mail lynsey@hacleanrooms.com +8613924524152 Our Newsletter Subscribe to our newsletter for discounts and more. send email Privacy Policy |  Sitemap  | China Good Quality Machine Made Cleanroom Sandwich Panel Supplier. Copyright © 2024-2025 GUANGDONG HUAAO CLEAN TECHNOLOGY GROUP CO.,LTD . All Rights Reserved.