ISO 14644-4:2022

Overview

ISO 14644-4:2022 - "Cleanrooms and associated controlled environments - Part 4: Design, construction and start‑up" defines a structured process for creating or modifying cleanrooms from requirements capture through design, construction and start‑up (commissioning). Applicable to new, refurbished and modified installations, the standard focuses primarily on controlling airborne particle concentration and provides checklists, verification steps and lifecycle considerations to ensure sustained performance. It does not mandate specific technologies or contractual approaches.

Key topics and technical requirements

• Requirements capture and documentation
  • Clear statement of purpose, acceptance criteria and performance parameters prior to design.
• Design process
  • Conceptual, basic and detailed design stages with design review against requirements.
  • Consideration of additional cleanliness attributes (chemicals, nanoscale particles, viable particles) when relevant.
• Ventilation and contamination control
  • Emphasis on ventilation effectiveness and airflow patterns. Two effectiveness measures identified: Air Change Effectiveness (ACE) and Contaminant Removal Effectiveness (CRE).
  • Use of air supply rates for contaminant dilution/removal calculations to support energy‑efficient layouts.
• Energy management and lifecycle
  • Energy‑efficient cleanroom design approaches and life‑cycle considerations (complements ISO 14644‑16).
• Construction and clean build protocol
  • Construction planning, quality plans and a clean build protocol to limit contamination during building.
  • Construction verification and documentation requirements.
• Start‑up / Commissioning
  • Setting to work, functional and performance verifications, training, handover and maintenance instructions.
  • Records: commissioning documentation, maintenance records and training logs.
• Risk assessment and change management
  • Contamination risk assessments to identify critical control points and change management throughout design and construction.

Practical applications and who uses it

ISO 14644‑4 is used by:

• Cleanroom specifiers, designers and architects for compliant layouts and HVAC/airflow strategies.
• Purchasers, suppliers and contractors to define deliverables, quality plans and clean build protocols.
• Builders and commissioning teams to structure construction verification and start‑up testing.
• Performance verifiers and facility managers for acceptance testing, handover and lifecycle maintenance planning.

Typical industries: pharmaceuticals, medical devices, microelectronics, aerospace, food processing, research laboratories and healthcare environments requiring controlled airborne particulates.

Related standards

• ISO 14644‑1 (air cleanliness classification), ISO 14644‑2 (testing/monitoring), ISO 14644‑5 (operation, cleaning, maintenance), ISO 14644‑7 (separative devices), ISO 14644‑16 (energy efficiency), plus other parts of the ISO 14644 series for complementary guidance.
  Note: ISO 14644‑4 does not address fire/safety regulations or specific operational processes - refer to relevant codes and the other ISO 14644 parts.