ISO 14644-3-2019 (2020) PDF

Full title and description

St ISO 14644-3:2019 (corrected version 2020) — "Cleanrooms and associated controlled environments — Part 3: Test methods". This International Standard specifies test methods, recommended test apparatus and procedures to determine the performance of cleanrooms and clean zones for air cleanliness classification and related controlled conditions, addressing both unidirectional and non‑unidirectional airflow types and the three occupancy states (as‑built, at‑rest and operational).

Abstract

This document provides standardised test methods to support operation and performance assessment of cleanrooms and associated controlled environments. It defines measurement procedures for airborne particle counting, airflow and velocity measurements, HEPA/ULPA integrity and related performance parameters; offers alternative procedures where appropriate; and clarifies that it does not apply to measurement of products or processes inside cleanrooms.

General information

• Status: Published.
• Publication date: August 2019 (ISO edition 2); corrected version published June 2020 (administrative corrections).
• Publisher: International Organization for Standardization (ISO).
• ICS / categories: 13.040.35 — Cleanrooms and associated controlled environments.
• Edition / version: Edition 2 (2019).
• Number of pages: 52 pages (ISO published text; national/transposed editions vary slightly).

Scope

Defines test methods and measurement procedures for assessing cleanroom performance and for verifying compliance with air cleanliness classification and related controlled environment requirements. Covers tests for particle concentration (by size), airflow patterns and velocities, filter integrity and other performance attributes in unidirectional (laminar) and non‑unidirectional (mixed/turbulent) airflows, across the three defined occupancy states: as‑built, at‑rest and operational. It is not intended for direct measurement of product or process contamination inside the controlled environment.

Key topics and requirements

• Standardised particle counting methods for air cleanliness classification (sampling strategies, probe locations, sample volumes).
• Procedures for airflow and velocity measurement, including recommendations for instrumentation and measurement grids.
• Performance tests for unidirectional and non‑unidirectional airflow cleanrooms, and test procedures for the three occupancy states: as‑built, at‑rest and operational.
• Recommended methods for HEPA/ULPA filter integrity, leak and installation testing.
• Guidance on recovery testing, airflow visualisation (smoke/laminarity checks) and turbulent diffusion assessment.
• Allowance for alternative methods or apparatus by agreement between supplier and customer; note that alternative methods may not be directly equivalent.
• Statement that the standard does not address product/process measurement nor specific safety procedures for hazardous materials.

Typical use and users

Used by cleanroom validation and qualification engineers, environmental monitoring teams, facility designers, HVAC and filtration specialists, testing laboratories, pharmaceutical/biotech/medical device manufacturers, semiconductor and microelectronics manufacturers, and regulatory auditors seeking harmonised test methods for assessing cleanroom performance. Contract test laboratories and in‑house quality/engineering groups commonly apply these methods during commissioning, periodic requalification and after major modifications.

Related standards

Part of the ISO 14644 series; closely related parts include ISO 14644‑1 (classification of air cleanliness), ISO 14644‑2 (monitoring to provide evidence of cleanroom performance), ISO 14644‑4 (design, construction and start‑up), ISO 14644‑5 (operations), ISO 14644‑8 (classification of airborne molecular contamination), ISO 14644‑9 (separative devices), and associated technical reports and national/adopted EN versions. National and regional adoptions (EN ISO, BS EN, DIN EN, etc.) reflect the ISO text with local transposition.

Keywords

Cleanroom, test methods, particle counting, air cleanliness classification, as‑built, at‑rest, operational, unidirectional airflow, non‑unidirectional airflow, HEPA, ULPA, filter integrity, recovery testing, validation, qualification.

FAQ

Q: What is this standard?

A: ISO 14644‑3:2019 is the part of the ISO 14644 series that specifies standard test methods and measurement procedures used to assess and verify the performance of cleanrooms and associated controlled environments. It provides the practical tests used during commissioning and periodic qualification.

Q: What does it cover?

A: It covers measurement procedures for airborne particle concentrations, airflow and velocity measurements, filter integrity and related performance tests for unidirectional and non‑unidirectional cleanrooms in the as‑built, at‑rest and operational states. It also describes recommended apparatus and sampling strategies and allows alternative methods by agreement; it does not cover measurement of products or processes or safety instructions for hazardous work.

Q: Who typically uses it?

A: Cleanroom validation/qualification engineers, environmental monitoring teams, testing laboratories, production engineers in pharmaceutical, biotech, medical device and semiconductor industries, facility designers, HVAC/filtration contractors and regulatory/compliance auditors.

Q: Is it current or superseded?

A: The 2019 edition (Edition 2) is the current ISO edition, published August 2019 with a corrected version issued in June 2020; it supersedes ISO 14644‑3:2005. National and regional adoptions (EN ISO / BS EN / DIN EN, etc.) reflect the ISO 2019 text. Users should check for any later amendments, corrigenda or replacement reviews when planning compliance activities.

Q: Is it part of a series?

A: Yes — it is one part of the ISO 14644 series addressing cleanrooms and associated controlled environments; each part covers different aspects (classification, monitoring, test methods, design, operation, etc.).

Q: What are the key keywords?

A: Cleanroom, test methods, particle counting, airflow, as‑built, at‑rest, operational, unidirectional, non‑unidirectional, HEPA/ULPA, validation, qualification.