What Is a Cleanroom Air Shower?

An air shower is a contamination control device installed at the entrance of a cleanroom. It uses high-velocity, HEPA-filtered air to remove dust particles, fibers, and other contaminants from personnel, garments, and materials before they enter the controlled environment.

In a cleanroom, maintaining low particle levels is critical for product quality and process safety. However, people and materials entering from outside areas are the main sources of contamination. An air shower creates an effective barrier between the uncontrolled environment and the cleanroom, helping maintain the required cleanliness classification.

Cleanroom air showers are widely used in pharmaceutical manufacturing, biotechnology laboratories, semiconductor production, food processing, medical facilities, and other industries requiring strict contamination control.

How Does an Air Shower Work?

A cleanroom air shower operates through a simple but effective particle removal process:

1. Entry Into the Air Shower Chamber

Personnel or materials enter the air shower through the first door. Once the door closes, the interlock system prevents both doors from opening simultaneously.

2. High-Speed HEPA Filtered Air Blowing

Multiple nozzles installed on the walls and ceiling release high-velocity clean air. The air velocity is typically 20-28 m/s, creating strong airflow that removes loose particles from clothing surfaces and materials.

3. Contaminated Air Filtration

The removed particles are captured by return air grilles and pass through the filtration system. The air is then cleaned and recirculated inside the air shower chamber.

4. Cleanroom Entry

After the preset cycle time, usually 10-30 seconds, the clean side door unlocks, allowing personnel or materials to enter the cleanroom.

This process significantly reduces surface contamination before entering critical clean areas.

Why Do Cleanrooms Need Air Showers?

Cleanrooms are designed to control airborne particles, but personnel remain one of the largest sources of contamination.

Common contaminants introduced by people include:

Dust particles

Fibers from clothing

Hair and skin particles

External environmental particles

Packaging debris

Without proper contamination control measures, these particles can enter the cleanroom and affect product quality.

An air shower provides an additional protection barrier by:

Reducing particle transfer from outside areas

Improving cleanroom cleanliness performance

Supporting ISO cleanroom classification requirements

Protecting sensitive products and processes

For industries such as pharmaceuticals, electronics, and biotechnology, air showers are an important part of the overall cleanroom design.

Main Types of Cleanroom Air Showers

1. Single Person Air Shower

A single-person air shower is the most common type used in cleanroom facilities.

It is designed for one person at a time and provides a compact solution for standard cleanroom entrances.

Features:

Compact footprint

Suitable for laboratories and small cleanrooms

Usually equipped with 6-12 air nozzles

Easy installation and maintenance

Typical Applications:

Pharmaceutical laboratories

Research facilities

Medical cleanrooms

Small-scale manufacturing areas

2. Multi-Person Air Shower

A multi-person air shower is designed for facilities with higher personnel traffic.

It allows multiple operators to enter at the same time, improving workflow efficiency.

Features:

Capacity for 2-6 people

Larger internal chamber

More nozzles for wider airflow coverage

Suitable for busy production environments

Typical Applications:

Large pharmaceutical plants

Electronics factories

Industrial cleanrooms

3. Cargo Air Shower

A cargo air shower, also called a material air shower, is designed for cleaning materials, carts, equipment, and production components.

Compared with personnel air showers, cargo air showers have larger dimensions and wider access doors.

Features:

Large chamber size

Suitable for carts and equipment

Optional roller conveyor system

Customized dimensions available

Typical Applications:

Semiconductor factories

Pharmaceutical production lines

Food processing facilities

4. Corner Air Shower

A corner air shower is designed for cleanrooms where installation space is limited.

Its special configuration allows it to fit into corners while maintaining effective airflow coverage.

Advantages:

Saves floor space

Flexible installation

Suitable for compact cleanroom layouts

5. Sliding Door Air Shower

A sliding door air shower uses automatic sliding doors instead of traditional hinged doors.

It is ideal for high-traffic areas where space optimization and fast personnel movement are important.

Advantages:

Saves entrance space

Faster traffic flow

Suitable for automated facilities

Key Features to Consider When Choosing an Air Shower

1. Air Nozzle Configuration

The number and location of air nozzles directly affect cleaning performance.

Common configurations include:

6-12 nozzles for standard applications

18 or more nozzles for high-performance requirements

Three-side nozzle designs provide better coverage around personnel.

2. Air Velocity

The airflow speed of an air shower usually ranges from:

20-28 m/s

Higher air velocity improves particle removal efficiency but may increase noise levels and energy consumption.

3. Filtration System

The filtration system determines the cleanliness of the supplied air.

Common options include:

HEPA H14 Filter

Efficiency: 99.995% at 0.3 μm

Suitable for pharmaceutical, laboratory, and biotechnology applications

Meets high cleanliness requirements

ULPA Filter

Used for applications requiring extremely low particle levels, such as advanced semiconductor manufacturing.

4. Construction Material

Material selection depends on application requirements.

SUS304 Stainless Steel

Recommended for:

Pharmaceutical facilities

Biotechnology laboratories

Medical environments

High-cleanliness applications

Advantages:

Corrosion resistance

Easy cleaning

Long service life

Powder-Coated Cold Rolled Steel

Suitable for:

General industrial cleanrooms

Cost-sensitive projects

5. Door Interlock System

The interlock system prevents both doors from opening simultaneously.

This helps:

Maintain cleanroom pressure balance

Prevent contamination migration

Improve operational safety

Available options include:

Mechanical interlock

Electronic interlock

Automatic control system

6. Control System

Modern air showers are equipped with intelligent control systems.

Common features include:

PLC touchscreen control

Adjustable shower cycle time

Emergency stop button

LED status indicators

Automatic door control

Air Shower Applications

Pharmaceutical Manufacturing

Air showers help maintain GMP-controlled environments by reducing contamination risks before personnel enter production areas.

Biotechnology Laboratories

Used to protect sensitive biological processes and maintain controlled laboratory conditions.

Semiconductor and Electronics Manufacturing

Particle contamination can affect electronic components. Air showers provide additional contamination control before entering clean production areas.

Food Processing

Air showers help improve hygiene control in food production environments.

Hospitals and Medical Facilities

Used at entrances to sterile areas, operating rooms, and specialized laboratories.

Cosmetics Manufacturing

Supports product quality and reduces contamination risks during production.

How to Select the Right Air Shower for Your Cleanroom

Before purchasing an air shower, consider the following factors:

1. Determine Traffic Requirements

Estimate how many people or materials enter the cleanroom per hour.

Low traffic: Single-person air shower

High traffic: Multi-person air shower

2. Check Available Installation Space

Choose the correct configuration:

Standard air shower

Corner air shower

Sliding door air shower

3. Consider Material Transfer Needs

If carts, equipment, or large materials need to pass through, choose a cargo air shower.

4. Select the Appropriate Material

SUS304 stainless steel for pharmaceutical and high-cleanliness applications

Coated steel for general industrial use

5. Verify Filtration Requirements

Most applications require:

HEPA H14 filtration

20-28 m/s nozzle velocity

Air Shower Maintenance Requirements

Regular maintenance ensures long-term performance.

Recommended maintenance includes:

Checking HEPA filter condition

Cleaning air nozzles

Inspecting door interlock operation

Checking airflow performance

Replacing filters according to operating conditions

Proper maintenance helps maintain stable airflow and contamination control performance.

Conclusion

An air shower is an essential component of modern cleanroom contamination control systems. By using high-speed HEPA-filtered airflow, it helps remove loose particles from personnel and materials before entering controlled environments.

Selecting the correct air shower type, filtration system, material, and configuration ensures efficient cleanroom operation while maintaining required cleanliness levels.

GCC Cleanroom Technology Limited provides customized cleanroom air shower solutions for pharmaceutical, laboratory, electronics, food, and industrial applications.

Our air shower systems feature:

SUS304 stainless steel construction

HEPA H14 filtration

High-speed air nozzles

Automatic interlock doors

PLC touchscreen control

Customized sizes and configurations

For cleanroom air shower specifications or customized solutions, please contact GCC Cleanroom Technology.

Website: www.prefabcleanroom.com
Email: sales01@gzkunling.com
WhatsApp: +86 13316272505