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 often should an ISO 5 hardwall cleanroom be cleaned?

An ISO 5 hardwall cleanroom should be cleaned daily to maintain its stringent cleanliness standards. High-touch surfaces and floors require frequent cleaning, while deep cleaning of walls and ceilings should be performed weekly.

2. What materials are used in hardwall cleanrooms?

Hardwall cleanrooms typically use materials like stainless steel, aluminum, and high-density plastics for their panels and components. These materials are chosen for their durability, ease of cleaning, and resistance to contamination.

3. How to achieve energy efficiency in cleanrooms?

To achieve energy efficiency in cleanrooms, utilize energy-efficient HEPA filters, optimize airflow rates, and implement advanced HVAC control systems. Regular maintenance and monitoring can also help in reducing energy consumption.

4. How to select the right HEPA filters for cleanrooms?

Selecting the right HEPA filters involves considering factors like particle size capture efficiency, airflow resistance, and filter lifespan. Consult with filter manufacturers and ensure compliance with cleanroom standards.

5. What is the lifespan of a hardwall cleanroom?

The lifespan of a hardwall cleanroom can range from 10 to 20 years, depending on the quality of materials used, maintenance practices, and the intensity of use.

6. How to improve air flow in a hardwall cleanroom?

Improving airflow in a hardwall cleanroom can be achieved by optimizing HVAC system design, ensuring proper placement of air diffusers and returns, and regularly maintaining the filtration system.

7. How to install a hardwall cleanroom?

Installing a hardwall cleanroom involves several steps: planning and design, selecting materials, constructing the frame and panels, installing HVAC and filtration systems, and performing rigorous testing to ensure compliance with ISO standards.

8. What are the air filtration technologies for cleanrooms?

Air filtration technologies for cleanrooms include HEPA filters, ULPA filters, and activated carbon filters. These technologies are used to remove particulates, microorganisms, and chemical contaminants from the air.

9. How to achieve uniform air distribution in a cleanroom?

Achieving uniform air distribution in a cleanroom involves designing an efficient HVAC system, strategically placing air diffusers and returns, and using laminar flow hoods to direct air evenly throughout the space.

10. 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 are chosen for their effectiveness in removing contaminants without leaving residues.

11. What are the challenges in maintaining ISO 5 cleanrooms?

Maintaining ISO 5 cleanrooms presents challenges such as controlling airborne particles, ensuring consistent cleaning protocols, and maintaining equipment integrity. Regular monitoring and stringent adherence to procedures are essential.

12. What are the vibration control measures for cleanrooms?

Vibration control measures for cleanrooms include using vibration isolation tables, installing dampening materials, and designing the structure with anti-vibration mounts to minimize the impact of external and internal vibrations.

13. How to manage cleanroom projects?

Managing cleanroom projects involves detailed planning, coordination with stakeholders, selecting appropriate materials, and ensuring compliance with regulatory standards. Effective project management includes scheduling, budgeting, and quality control.

14. How to test air quality in an ISO 5 hardwall cleanroom?

Testing air quality in an ISO 5 hardwall cleanroom involves particle counting using laser particle counters, measuring airflow rates, and conducting microbiological sampling to ensure compliance with ISO standards.

15. How to control humidity in an ISO 5 hardwall cleanroom?

Controlling humidity in an ISO 5 hardwall cleanroom can be achieved by using dehumidifiers, implementing precise HVAC controls, and monitoring humidity levels continuously to adjust systems as needed.

16. What is the difference between hardwall and softwall cleanrooms?

Hardwall cleanrooms feature rigid, durable panels that provide a stable structure and better contamination control. Softwall cleanrooms use flexible curtains, making them more versatile and easier to reconfigure, but they may not offer the same level of particle control as hardwall cleanrooms.