We provide a fully independent validation service for the commissioning or maintenance testing of containment facilities including ACDP and DEFRA Level 3 & 4 laboratories.

Experience has shown early involvement at design and specification steps can greatly reduce delays at commissioning or validation and the costs associated with them.


Types of Containment Facilities

  • Patient Isolator rooms
  • ACDP & DEFRA Level 3 & 4
  • Commissioning including control systems
  • HEPA filter supply, installation and certification
  • Full fumigation service
  • Provision of fumigation protocols

CL3 and CL4 Facility: Typical Approach

Crowthorne Hi-Tec Services has considerable experience in the commissioning and validation of CL3 and 4 facilities. Successful projects often involve the following ten step approach:

  1. Review design & specification
  2. Visual Inspection
  3. Negative pressure room integrity test
  4. Air flow pressure test
  5. HEPA filter test
  6. Commissioning of MSC’s
  7. Fumigation mode (Ambient pressure) room integrity test
  8. Room pressure control challenge test
  9. Inspect operational general room requirements
  10. Review fumigation protocol

We offer a full 24 hour emergency fumigation service including:

routine inspection, room integrity testing, fumigation correct control

and fumigation efficacy studies.


To discuss your requirements, contact us at:

+44 (0)1252 372333 or enquiries@chts.co.uk


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