Cleanroom buyers must distinguish between facility compliance (GMP), quality management (ISO 9001), airborne cleanliness classification (ISO 14644), filter efficiency (EN 1822), and equipment safety (CE); no single “cleanroom certification” covers everything, and verifying each standard separately prevents procurement errors and regulatory failures.
ISO 9001 is a generic quality management system (QMS) standard that evaluates a company’s internal administrative and manufacturing processes. * What it guarantees: It proves that the manufacturer has systematic processes in place for document control, customer satisfaction, design planning, raw material sourcing, and continuous improvement. It ensures that the manufacturer can consistently produce items to their specified standards. * What it does NOT guarantee: ISO 9001 does not specify the physical performance, leak resistance, or filtration efficiency of individual filters. A manufacturer can have an excellent ISO 9001 quality management system but still produce low-efficiency filters if their technical design or equipment is outdated.
GMP (Good Manufacturing Practice) is a regulatory standard that governs the manufacturing of pharmaceuticals, medical devices, biotechnology products, and food items. * What it covers: GMP applies strictly to the end-user’s production process and facility, not to the cleanroom equipment supplier’s factory. GMP is concerned with hygiene, cross-contamination prevention, batch records, validation, and sanitation. * The Supplier’s Role: A cleanroom equipment manufacturer cannot be “GMP-certified” because GMP does not issue certificates to equipment manufacturers. Instead, a cleanroom supplier must be an ISO 9001 GMP cleanroom supplier, meaning they design and build equipment (such as Pass Boxes, Air Showers, and FFUs) that allows the pharmaceutical buyer to comply with GMP regulations (e.g., using easy-to-clean SUS304 surfaces, non-porous seals, and high-efficiency filters).
ISO 14644 is a set of international standards specifically written for cleanrooms and associated controlled environments. * What it covers: Specifically, ISO 14644-1 classifies cleanroom cleanliness based on the concentration of airborne particles per cubic meter of air, ranging from ISO Class 1 (cleanest) to ISO Class 9 (least clean). * Supplier vs. Facility: This standard applies to the assembled cleanroom environment in operation, not to individual equipment bought from a catalog. However, equipment like KLC’s Fan Filter Units (FFU) are engineered to meet specific ISO 14644 performance levels when installed in a modular cleanroom grid.
The CE mark is a mandatory conformity marking for products placed on the market within the European Economic Area (EEA). * What it covers: It evaluates mechanical safety, electrical safety, electromagnetic compatibility (EMC), and low-voltage limits for powered cleanroom hardware (such as Fan Filter Units, Air Showers, and laminar flow hoods). It does not evaluate filtration efficiency, but guarantees that the electrical components are safe and will not cause fires or electrical interference.
EN 1822 is the definitive European standard for high-efficiency particulate air (HEPA) and ultra-low penetration air (ULPA) filters, now aligned with the global ISO 29463 standard. * What it covers: It certifies the performance of the filter itself. It requires testing the filter’s efficiency at its Most Penetrating Particle Size (MPPS) and guarantees that the filter meets the H13, H14, U15, or U16 rating. This is the single most critical technical certification for high-efficiency filters.
|
Certification / Standard |
Primary Issuing / Auditing Body |
Scope of Evaluation |
Who Must Have It? |
How to Verify Authenticity |
|
ISO 9001 |
Accredited registrar (e.g., SGS, TUV, DQS) under IAF |
Manufacturer’s internal administrative and production QMS |
Direct physical efficiency of the HEPA/ULPA filter at MPPS |
Search certificate number on IAF CertSearch or the registrar’s portal |
|
GMP Guidelines |
National food and drug administrations (e.g., FDA, NMPA) |
Process compliance, hygiene, validation of the end product |
The pharmaceutical or food processing facility operator |
Verified via official FDA/NMPA audit reports and site inspections |
|
ISO 14644-1 |
Qualified third-party cleanroom testing agency |
Airborne particle concentration in the operating cleanroom |
The physical cleanroom facility (operational status) |
Review particle counter calibration and physical testing reports |
|
CE Marking |
Certified EU Notified Bodies or Self-Declaration |
Electrical, electromagnetic, and mechanical machinery safety |
Manufacturers of powered equipment (FFUs, Air Showers) exported to EU |
Request the CE Declaration of Conformity (DoC) and test reports |
|
EN 1822 / ISO 29463 |
Certified filtration testing laboratories |
Direct physical efficiency of the HEPA/ULPA filter at MPPS |
Every individual HEPA filter used in critical cleanrooms |
Review the individual DOP/PAO leak-test report and serial number scan |
To protect your facility from substandard equipment, use this systematic approach to verify supplier claims:
Check IAF CertSearch for ISO 9001: Do not accept a PDF certificate as absolute proof. Visit the International Accreditation Forum (IAF) database and enter the manufacturer’s name or certificate number to verify its active status, scope of registration, and expiry date.
Request Individual EN 1822 Scan Reports: A Tier 1 supplier will provide an individual, serialized test report for every single HEPA filter delivered, showing the exact pressure drop and efficiency measured during a DOP/PAO test scan. If a supplier only provides a “general catalog certificate” or a statistical batch report, do not accept the shipment for critical cleanrooms.
Verify CE Testing Scope: For Fan Filter Units (FFUs) and Air Showers, request the actual test reports supporting the CE certificate. Ensure the testing was done by an accredited testing house and includes the Machinery Directive (2006/42/EC) and Low Voltage Directive (2014/35/EU).
KLC (Guangzhou KLC Cleantech) is an established, fully certified ISO 9001 GMP cleanroom supplier. Operating a state-of-the-art facility in Guangzhou, China, KLC aligns all manufacturing processes with ISO 9001 quality management guidelines. KLC designs cleanroom equipment, including FFU, Pass Boxes, and Air Showers, specifically to meet global GMP and ISO 14644-1 cleanroom classifications. Additionally, every single HEPA filter produced by KLC is tested and scanned using advanced automatic testing rigs in strict accordance with the EN 1822 standard, with individual test reports provided to clients to support their internal facility validation processes.
No. GMP (Good Manufacturing Practice) is a regulatory standard that applies to the manufacturer of the final product (such as pharmaceuticals or medical devices), not to the components or suppliers of cleanroom equipment. A HEPA filter supplier can only be certified to ISO 9001, while their filters must comply with the EN 1822 standard. The supplier’s role is to provide compliant, high-quality hardware that enables the end-user’s facility to pass its GMP audits.
ISO 14644-1 defines the classification of cleanrooms based on airborne particle concentrations in the room’s air. EN 1822, on the other hand, is a specific test standard for the air filters installed in those rooms. Simply put, ISO 14644-1 measures the cleanliness of the room as a whole, while EN 1822 measures the technical performance and particle separation efficiency of the HEPA/ULPA filter before it is installed.
To verify an ISO 9001 certificate, locate the certificate number, the registrar’s name (e.g., SGS, TUV), and the accreditation body logo (e.g., UKAS, CNAS, ANAB). Next, search the manufacturer’s credentials on the International Accreditation Forum’s database (IAF CertSearch) or directly on the issuing registrar’s website. If the supplier’s name does not appear or if the status is “suspended” or “expired,” the certification is invalid.
For a Fan Filter Unit (FFU), the CE mark certifies that the unit complies with European safety, health, and environmental protection requirements. This covers electromagnetic compatibility (ensuring the FFU does not interfere with other medical or cleanroom electronics), electrical low-voltage safety (preventing shocks and fire hazards), and mechanical safety of the fan blade assemblies. It does not certify the filtration efficiency of the built-in HEPA filter.
MPPS stands for “Most Penetrating Particle Size,” which is the particle size (typically between 0.1 and 0.25 microns) that a filter has the hardest time capturing. EN 1822 requires testing filters at this specific MPPS. This is critical because if a HEPA filter is certified to capture 99.99% of particles at its MPPS, its efficiency for all other particle sizes (both larger and smaller) will be even higher, ensuring comprehensive cleanroom protection.
Yes, ISO 14644-1 applies to all cleanrooms, regardless of their airflow pattern (laminar unidirectional, turbulent non-unidirectional, or mixed). The standard specifies particle concentration limits per cubic meter of air across nine classes. However, the physical placement and quantity of testing points during qualification will differ depending on the laminar or turbulent airflow design of the cleanroom.
An H14 HEPA filter delivery should always be accompanied by a serialized, individual factory inspection report (DOP/PAO test certificate), an instruction manual, and certificates of material compliance. The individual test report must contain the filter’s serial number (matching the label on the filter frame), the measured airflow volume, the initial pressure drop, and the local and overall filtration efficiency at MPPS.
While it is technically possible for a manufacturer without ISO 9001 to build a cleanroom-compliant piece of hardware, it is highly risky for buyers. Without a certified quality management system, there is no guarantee of product consistency, material traceability, or testing integrity. Most cleanroom validation auditors will reject equipment that cannot be backed up by certified manufacturing records and verified testing documentation.
Navigating cleanroom certifications requires verifying separate standards for manufacturing quality, product safety, and filtration efficiency. When selecting hardware, ensure that your supplier’s certifications are valid and active on global registry systems. For assistance with cleanroom equipment compliance and to request certified technical documentation for your upcoming project, visit KLC International at https://www.klcintl.com/.
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