To maintain ISO 5 classification, the following criteria must be met:

Particle Concentration Limits (per cubic meter of air)

0.5 microns: ≤ 3,520 particles

5 microns: ≤ 0.1 particles (the particle count drops significantly for larger particles)

Class 100 (in U.S. classification): ISO 5 cleanrooms are often referred to as Class 100 cleanrooms in the U.S. classification system.

Airflow Design

• Laminar or Unidirectional Airflow: To maintain the cleanliness, air must flow in a uniform direction, typically from ceiling to floor, with minimal turbulence to prevent particles from settling.

• HEPA or ULPA Filters: Air is filtered through High-Efficiency Particulate Air (HEPA) or Ultra-Low Penetration Air (ULPA)filters that capture particles down to 0.3 microns or smaller. ULPA filters provide even higher efficiency, capturing particles down to 0.12 microns.

Installation Steps

• Environment Preparation

• Frame Assembly

• Filter and Fan Installation

• Commissioning

• Air Supply and Exhaust Volume Testing

• Airflow Control Inspection

• Inspection Instruments and Equipment

• Testing Standards and Criteria

• Testing Steps and Processes

1. How to control temperature in an ISO 5 hardwall cleanroom?

Temperature in an ISO 5 hardwall cleanroom is controlled through a dedicated HVAC system designed for precise climate control. It involves the use of sensors to monitor temperature and adjust heating or cooling as needed. Insulated walls and proper sealing also help maintain consistent temperatures.

2. What is the standard for ISO 5 cleanrooms?

ISO 5 cleanrooms must have no more than 3,520 particles per cubic meter, each particle being 0.5 microns or larger. This standard ensures a highly controlled environment suitable for sensitive processes requiring minimal contamination.

3. What are the requirements for cleanroom doors?

Cleanroom doors should be:

• Airtight

• Easy to clean

• Made of non-shedding materials

These requirements help maintain the integrity of the cleanroom environment by preventing contamination and ensuring ease of maintenance.

4. How to achieve laminar airflow in a hardwall cleanroom?

To achieve laminar airflow, it is essential to use HEPA filters to deliver a uniform, unidirectional flow of air. The air should move at a consistent speed across the entire cleanroom to minimize turbulence and ensure that contaminants are effectively removed.

5. What is the difference between ISO 5 and ISO 7 cleanrooms?

ISO 5 cleanrooms allow a maximum of 3,520 particles per cubic meter, while ISO 7 cleanrooms allow up to 352,000 particles per cubic meter. This significant difference in particle count requirements means that ISO 5 cleanrooms are much stricter in terms of cleanliness and are used for more sensitive applications.

6. How to design a cleanroom for aerospace applications?

Designing a cleanroom for aerospace applications involves ensuring stringent contamination control, using high-quality materials, and implementing advanced air filtration systems. The design must also consider vibration control and strict environmental monitoring to meet the precise needs of aerospace manufacturing.

7. What are the lighting standards for ISO 5 cleanrooms?

Lighting in ISO 5 cleanrooms should be bright, even, and not produce any particles or heat that could affect the cleanroom environment. LED lights are commonly used due to their low heat emission and long lifespan.

8. What are the cleaning protocols for hardwall cleanrooms?

Cleaning protocols for hardwall cleanrooms include daily cleaning of high-touch surfaces, weekly deep cleaning of walls and ceilings, and regular monitoring of particle levels. Cleaning agents should be non-shedding and compatible with cleanroom standards.

9. How to achieve ISO 5 standards in hardwall cleanrooms?

To achieve ISO 5 standards, it is crucial to use HEPA filtration, maintain strict cleaning protocols, and ensure proper gowning procedures for personnel. Regular monitoring and maintenance of the cleanroom environment are also essential.

10. What are the ISO 5 cleanroom classification criteria?

ISO 5 cleanroom classification criteria include maintaining a maximum of 3,520 particles per cubic meter of air, with each particle being 0.5 microns or larger. This ensures a highly controlled and clean environment suitable for sensitive processes.

11. What materials are used in hardwall cleanrooms?

Materials used in hardwall cleanrooms typically include stainless steel, aluminum, and high-density plastics. These materials are chosen for their durability, ease of cleaning, and low particle shedding properties.

12. What are the cleaning agents used in hardwall cleanrooms?

Cleaning agents used in hardwall cleanrooms include isopropyl alcohol, hydrogen peroxide solutions, and specialized cleanroom detergents. These agents effectively remove contaminants without leaving harmful residues.

13. What are the cleanroom standards for electronics manufacturing?

Cleanroom standards for electronics manufacturing involve maintaining low levels of particulates, humidity control, and ensuring electrostatic discharge protection. ISO 5 or ISO 7 cleanrooms are commonly used in this industry to meet stringent cleanliness requirements.

14. How to train staff for working in a hardwall cleanroom?

Training staff for working in a hardwall cleanroom includes:

• Cleanroom etiquette and behavior

• Proper gowning procedures

• Understanding contamination control

Regular training and refresher courses help maintain high standards of cleanliness and efficiency.

15. What are the fire safety requirements for hardwall cleanrooms?

Fire safety requirements for hardwall cleanrooms include using fire-resistant materials, installing smoke detectors and fire suppression systems, and maintaining clear evacuation routes. Regular fire drills and safety audits are also essential to ensure compliance and readiness.