Cleanroom airflow and particle certification
Jul 7 – Oct 17, 2026Updated Oct 17, 2026
Reviewed by Dimitry Apollonsky
Which brands AI mentions
Mentioned in
ChatGPTChatGPTGoogle AI ModeGoogle AI Mode
Widest split: Institute of Environmental Sciences and Technology, 9% on ChatGPT and 55% on Google AI Mode.
- #1National Environmental Balancing BureauChatGPT 55%Google AI Mode 80%
- #2Institute of Environmental Sciences and TechnologyChatGPT 9%Google AI Mode 55%
- #3tiedCETA InternationalChatGPT 5%Google AI Mode 30%
- #3tiedTechmasterChatGPT 32%Google AI Mode 0%
- #3tiedHodessChatGPT 18%Google AI Mode 5%
Questions and answers
ChatGPTOct 8, 2026
For a manufacturing cleanroom, airflow and airborne particle counts are normally tested and documented by an independent cleanroom performance-testing/certification firm, rather than by the equipment manufacturer or the general contractor.
Who should you hire?
A good choice is a NEBB-certified Cleanroom Performance Testing (CPT) firm. NEBB specifically certifies firms and technicians for cleanroom performance testing, including airflow, particle counts, pressure, and related measurements.
The testing is typically performed to:
- ISO 14644-1 — classification of airborne particle cleanliness.
- ISO 14644-2 — ongoing monitoring/demonstration of cleanroom performance.
- ISO 14644-3 — test methods, including airflow-related performance testing.
What they will typically certify
A full cleanroom certification package can include:
Test What it establishes Airflow volume/velocity Supply airflow and uniformity Air changes (ACH) Overall ventilation rate Airborne particle counts Whether the room achieves its specified ISO Class Room differential pressure Correct pressure cascade HEPA/ULPA filter integrity No unacceptable filter leakage Airflow visualization/smoke study Airflow direction and patterns Recovery testing How quickly the room returns to its cleanliness level Temperature/RH Environmental conditions, if required NEBB's own CPT procedures specifically include airflow testing and airborne particle-count classification testing.
Important distinction: ISO itself doesn't send someone out to "certify" your room. ISO 14644 provides the standards and test methods; a qualified testing organization performs the measurements and issues the certification/report. For a regulated manufacturing facility, you should specify the required ISO class and occupancy state (as-built, at-rest, or operational) in the testing scope.
If this is pharmaceutical, medical-device, semiconductor, aerospace, or another regulated manufacturing facility, tell me which one and what ISO Class (e.g., ISO 5, 7, or 8) you're targeting. I can tell you exactly which tests you should put into the certification specification and who in the U.S. can perform them.
Google AI ModeSep 25, 2026
Cleanrooms are certified by third-party, specialized testing and balancing (TAB) or controlled environment testing firms rather than a single government agency. These service companies employ certified professionals who test your facility to prove compliance with recognized international and industry standards.
Who Performs the Certification
- Third-Party Testing Firms : Independent companies specializing in cleanroom performance testing (CPT). They come on-site with fully calibrated instruments to measure airflow, velocity, and particulate counts.
- Certified Professionals / Technicians : The individuals executing the tests should hold industry-recognized credentials to ensure their methods are legally and technically defensible for audits.
Key Certifications & Governing Bodies to Look For
When hiring a firm, ensure their technicians or the company hold credentials from major governing organizations:
- NEBB (National Environmental Balancing Bureau) : Offers the gold-standard Cleanroom Performance Testing (CPT) certification for firms and professionals.
- CETA (Controlled Environment Testing Association) : Specializes in standards and professional registration for controlled environments (often vital for compounding and critical manufacturing).
- NSF International : Frequently accredits technicians, especially for biosafety cabinets and laminar flow hoods working in tandem with cleanrooms.
Standards They Test Against
The certifier will evaluate your room against strict frameworks depending on your industry, most notably ISO 14644 (specifically ISO 14644-1 for particle concentration limits and ISO 14644-3 for test methods). Other common standards include EU Annex 1 (for pharmaceuticals) or USP 797 (for compounding).
Core Tests Included in a Certification
A standard cleanroom certification report typically covers:
- Airflow velocity and volume measurements
- Air changes per hour (ACH) calculations
- Non-viable airborne particle counts
- HEPA/ULPA filter integrity (leak) testing
- Room differential pressure testing
- Airflow visualization (smoke studies)
If you'd like, let me know:
- Your target ISO Class
(e.g., ISO 5, ISO 7)
- The industry you are manufacturing for (pharmaceutical, electronics, medical device, etc.)
I can give you a better idea of what specific tests your facility will be required to pass.
Sources cited in this answer7
- nebb.orgCleanroom Performance Testing Certification - NEBB
- nebb.orgCleanroom Performance Testing: How to Get Certification
- techsafety.comCleanroom Testing & Certification Services | TSS
- pen-tec.comControlled Environment (CETA) - Pentagon Technology
- goquantus.comOnsite Cleanroom Certification – Ensure Compliance with Quantus
- technicalairproducts.comISO 14644: Understanding Cleanroom Airflow Standards
Google AI ModeOct 17, 2026
Several established companies offer comprehensive cleanroom testing and certification services, including non-viable particle counting, airflow velocity/volume measurement, and HEPA filter integrity testing:
- Technical Safety Services (TSS) is a large nationwide provider performing cleanroom certifications, airflow volume/velocity measurements, room differential pressure tests, and non-viable particle counting that align with ISO 14644, cGMP, and IEST standards.
- Sinergix Testing and Certification offers nationwide controlled environment testing, adjustment, and certification. Their scope covers airborne particle counts (ISO 14644-1), filter leak testing, and airflow velocity/volume assessments.
- CSI Testing is a Midwest-based provider with decades of experience specializing in cleanroom certification, biosafety cabinets, and airborne particle/airflow verification to meet strict FDA, ISO, and cGMP requirements.
- Ace Cleanroom Solutions is a regional firm (focused heavily in the South/Texas area) providing certification, setup, and performance adjustments for cleanrooms and critical HEPA equipment.
If you'd like, let me know:
- Your facility's geographic location
- The cleanroom classification or standard required (e.g., ISO Class 5, ISO Class 7, cGMP)
- Whether you also need biosafety cabinet or fume hood testing
I can help narrow down a local or national provider best suited to your operational needs.
Sources cited in this answer6
- techsafety.comTesting & Certification Services | TSS
- techsafety.comElectronics and Semiconductor Cleanroom Services
- techsafety.comTechnical Safety Services, Controlled Environment Testing | TSS
- techsafety.comCleanroom Testing & Certification Services | TSS
- sinergixtesting.comCleanroom Certification | Sinergix Testing & Certification | Natiowide
- csitesting.comCleanroom Certification Companies - CSI Testing
ChatGPTOct 17, 2026
If you're looking in the Pittsburgh and western Pennsylvania area, I found several companies that specifically perform cleanroom certification, including airborne particle counting, airflow testing, and HEPA filter integrity testing.
For your requirements, I'd prioritize a company that can provide documented testing to ISO 14644-1 for airborne particle classification and ISO 14644-3 for airflow and related performance tests, if those are the standards applicable to your facility.
My top recommendations
1. Filtech Testing Division
(Best local starting point)
Munhall, Pennsylvania · Pittsburgh area
Filtech explicitly offers cleanroom certification, non-viable particle counting, airflow and room-pressure testing, air changes per hour, airflow visualization, and HEPA filter leak testing. Its local presence makes it a strong first call.
Phone: (412) 461-1400
Email: [email protected]
2. Air Filtration Management (AFM)
Bethlehem, Pennsylvania
A good candidate for independent cleanroom performance testing and certification. AFM identifies itself as a NEBB-certified testing agency and offers cleanroom certification, particle counting, HEPA/ULPA filter testing, and controlled-environment performance audits. Confirm its current travel coverage to your site.
Phone: (610) 867-3869
3. Scientific Safety Alliance (SSA)
Pennsylvania-wide service
SSA lists ISO 14644-1 particle classification, airflow and velocity mapping, HEPA integrity testing, pressure differential verification, and airflow visualization. It also supports USP and GMP-related cleanroom requirements. This is worth considering if you need a comprehensive, audit-ready certification package.
Pennsylvania cleanroom certification and quote request
4. CSI Testing
Pittsburgh service area
CSI advertises ISO 14644-1 cleanroom testing and certification, HEPA filter testing, and laminar-flow testing. It also offers advisory services for cleanroom design and operational performance. Ask about scheduling and travel charges for your specific facility.
Pittsburgh cleanroom testing services
What to ask when requesting a quote
To compare providers fairly, ask each company to confirm these items are included:
- Particle counts: Non-viable airborne particle counts and ISO classification, where required.
- Airflow testing: Air velocity, airflow volume, air changes per hour, and airflow visualization, as applicable.
- HEPA integrity: Filter leak testing.
- Room pressure: Differential pressure measurements and verification of airflow direction.
- Documentation: A signed certification report with measured results, applicable standards, and any deficiencies.
- Qualifications: Current NEBB or CETA credentials appropriate to the testing scope.
One important distinction: airflow volume, airflow velocity, and room pressurization are separate tests. Specify which measurements you need rather than asking only for “airflow certification.”
Let me narrow this down
Are you looking for a provider near Pittsburgh, or can the company be anywhere in the United States? And is this a pharmaceutical cleanroom, a manufacturing cleanroom, or another type of controlled environment? Those two details will help me identify the best-fit providers.
Sources cited in this answer9
- filtechinc.comFiltech Testing Division
- filtechinc.com| F i l t e c h T e s t i n g D i v i s i o n None --- | --- | F i l t e c h T e s t i n g D i v i s i o nValidation & Certification of HEPA Filter Systems
- filtechinc.comFiltech Testing Division
- airfiltrationmgmt.comAir Filtration Management, Inc. ( AFM ), Cleanroom Testing, Cleanroom Certification, and HEPA / ULPA Filter Testing
- airfiltrationmgmt.comAir Filtration Management, Inc. ( AFM ), Cleanroom Testing, Cleanroom Certification, and HEPA / ULPA Filter Testing
- scisafetyalliance.comCleanroom Certification Services in Pennsylvania
Also asked as
- I need to find a company that performs airflow and particle count certification for our new manufacturing cleanroom.
