National Cleanroom Certification Services

GENTAB certifies cleanrooms and controlled environments to the ISO 14644 family of standards for facilities nationwide. Whether you are commissioning a brand-new suite, requalifying after a shutdown, or maintaining a routine recertification schedule, our technicians document that each space performs to its required cleanliness classification under real operating conditions.

Certification is the formal verification that a controlled environment meets its design intent. We measure airborne particle concentrations, confirm filtration integrity, quantify air change rates and recovery performance, and verify room-to-room pressure relationships. Every result is captured in a defensible certification report that maps to your specifications, your standard operating procedures, and the cleanliness class you are claiming.

Because cleanroom failures are rarely about a single number, we test the system as a whole — supply, return, filtration, pressurization, and recovery — so you understand not just whether a room passed, but why it behaves the way it does. That diagnostic approach shortens the path from a failed reading to a corrective action and a clean recertification.

Airborne Particle Classification: Particle count measurement and statistical analysis to determine and document ISO 14644-1 cleanliness classification at rest and in operation.

HEPA / ULPA Filter Integrity Testing: Aerosol challenge (PAO) scanning of installed filters and housings to detect leaks, bypass, and media damage before they compromise the space.

Air Change Rate & Recovery: Supply airflow measurement, air change rate calculation, and recovery testing to confirm the room clears contamination within its required time.

Room Pressurization Verification: Differential pressure mapping across doors and adjacencies to confirm correct cascade and protect critical spaces from cross-contamination.

Airflow Visualization & Uniformity: Smoke studies and velocity uniformity testing for unidirectional flow zones, documenting that airflow patterns sweep contaminants as designed.

Certification Documentation: A complete, audit-ready certification package referencing test methods, instrumentation, acceptance criteria, and pass/fail results per room.