In late 2020 and early 2021, ISO released minor technical corrigenda (corrections) to ISO 14644-3:2019. These corrected typographical errors in formulas and clarified certain test setup diagrams. Any purchased from an authorized reseller after March 2021 should include these corrections.
If you buy a scanned PDF from a third-party, searchability is poor. Always request an electronic, text-searchable PDF from the official store. iso 146443pdf 2021
Responsibility for calibration frequency has shifted to the equipment owner, though the standard still mandates specific suitability criteria for measuring limits and error. Why These Standards Matter In late 2020 and early 2021, ISO released
As of 2025 (this article’s current context), the 2019 version remains valid. ISO standards are typically reviewed every 5 years. Therefore, a revision (ISO 14644-3:2025 or 2026) is possible but not yet published. If you buy a scanned PDF from a
The 2019 edition replaced the previous ISO 14644-3:2005. The 2019 version introduced significant updates, including new test methods for and revised guidance for filter leakage testing .