Cleanroom Classification (ISO 14644-1 Particle Counting)

Location: Letchworth Garden City, UK
Feb. 21 | July 18 | Oct. 30


There is a requirement in all cleanrooms and controlled environments to sample the airborne particle numbers and sizes for determining classification to ISO 14644-1.

Regulated industries such as pharmaceutical and life sciences require testing for GMP classification, and monitoring for control, following the same procedures.

Particle counting is more complex due to changes in the standards and the technology used in particle counters.

ATI delivers a one-day course on Cleanroom Classification, using trainers who are very experienced in this industry, the most current equipment, and the latest best practices to advise on compliance to ISO 14644-1 and other regulatory guides and standards.

The morning of theory will provide delegates with knowledge on the types of cleanroom and clean air devices, the instruments to use, and how to test for classification. The afternoon is reserved for either an examination or practical demonstration for an attendance certificate. Each gives delegates confidence in choosing the correct instrument, setting it up for use, operating it, and interpreting the results provided.

Who should attend?
Attendance is advised for anyone in the clean air and containment industry who has a role in engineering, testing, quality assurance, validation, operations, management, inspections, or anyone responsible for the performance of clean air facilities and equipment.

Our courses also prepare delegates for CTCB-I certification. CTCB-I Testing and CTCB-I Technology courses are hosted and endorsed by the Contamination Control Network (CCN). Visit for more information.

What people say
We have received a 100% satisfaction rating on post-training surveys. A recent delegate said,

“Great investment and well worth the money paid to undertake the training. A big thank you to Tim and Theresa, you did ATI proud.”

Class size

  • The course is designed for up to 14 delegates in ATI training rooms
  • Larger numbers of delegates can be trained at customer sites. Send an email to for more information or use the Contact Us Now form below.
  • Online courses are scheduled throughout the year for delegates who are unable to travel.

ATI has a custom-made facility complete with a training room and lab with various test set ups and instruments to ensure delegates receive a true hands-on experience. The facility is conveniently located near several hotels and shops and is accessible to nearby airports and trains. Lunch is provided at each training session.

Training materials and certificates
A course manual is provided, and a certificate is awarded for successful completion of the course and exam.


  • Luton Airport – Luton Airport is only 12 miles away. We recommend using the local taxi service from the airport.
  • Eurocabs – Eurocabs is based in Letchworth and they are the preferred taxi service. The fare from the airport to our facility is approximately £45 plus parking costs for up to four passengers. Cash only. + 44 (0)1462 600700
  • Hackney Carriage – Licensed Hackney Carriages are available from the rank outside the terminal. Please ask for pricing before you start your journey.
  • Car Hire – Car hire is available at all airports. Below is a list of the most common companies:

Free on-site parking is available at our facility.

All hotels are located conveniently within 1.2 miles of our training facility. The closest hotel is the Travelodge.

Travelodge Letchworth
Garden City

The Broadway Hotel

Premier Inn Letchworth
Garden City Hotel

Mercure Letchworth Hall



  Contact Us Now