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Introduction to Cleanroom Air Control Systems

Modern cleanrooms require precise environmental control for industries like pharmaceuticals, electronics, and food production. Key systems like MAU (Make-up Air Unit), RCU (Room Control Unit), FCU (Fan Coil Unit), and PAU (Pre-Cooling/Pre-Heating Air Unit) work together to maintain optimal air quality, temperature, and humidity.

This guide explains their functions, benefits, and applications—helping you choose the right system for your cleanroom needs.

1. MAU (Make-up Air Unit) – Fresh Air Supply & Filtration

Key Functions:

✔ Filters outdoor air (removes dust, pollen, bacteria)
✔ Regulates temperature & humidity for cleanroom standards
✔ Ensures stable air supply for personnel comfort

Why It’s Important?

• Critical for pharmaceuticals, electronics, and food industries where air purity is mandatory.

• Reduces contamination risks by supplying pre-treated fresh air.

• Works with other HVAC systems (AHU, FCU) for energy-efficient climate control.

2. RCU (Room Control Unit) – Precision Environmental Monitoring

Key Functions:

✔ Monitors temperature, humidity & pressure in real-time
✔ Automatically adjusts AHU/FCU settings for optimal conditions
✔ Alerts for faults & logs data for maintenance

Why It’s Important?

• Essential for pharma labs, semiconductor plants, and hospitals needing strict climate control.

• Enables remote adjustments for multi-room cleanrooms.

• Improves energy efficiency by preventing overcooling/heating.

3. FCU (Fan Coil Unit) – Localized Temperature Control

Key Functions:

✔ Heats/cools air via water-circulating coils
✔ Filters indoor air (removes dust & particles)
✔ Compact & customizable for small cleanrooms

Why It’s Important?

• Ideal for labs, hospitals, and server rooms needing zone-specific climate control.

• Energy-saving compared to central HVAC systems.

• Easy to install & maintain.

4. PAU (Pre-Cooling/Pre-Heating Air Unit) – Energy Efficiency Booster

Key Functions:

✔ Pre-cools air in summer, reducing AC load
✔ Pre-heats air in winter, cutting heating costs
✔ Stabilizes temperature before air enters MAU/AHU

Why It’s Important?

• Lowers energy costs by reducing HVAC workload.

• Extends equipment lifespan by preventing extreme temperature fluctuations.

• Used in large cleanrooms, data centers, and manufacturing plants.

How These Systems Work Together

These systems create a stable, clean, and energy-efficient environment for high-tech industries.

Need a Custom Cleanroom Solution?

Guangzhou Cleanroom Construction Co., Ltd. specializes in MAU, RCU, FCU, PAU, and other cleanroom equipment.

✅ Expert design & installation
✅ Energy-efficient systems
✅ Compliance with ISO/GMP standards