£1,045.00 +VAT

SKU: P604 Category:


Performance Evaluation and Management of LEV Systems

P604 Course overview

This advanced proficiency LEV Training Course, which is delivered as a Webinar/On-Line event, builds on the existing knowledge and expertise of delegates who will have completed the P601 LEV Training course module.

The tutors on this highly inter-active course are Bill Cassells and Hazel Griffiths. Those who have attended the OXYL8 P601, P602 etc LEV courses will know that Bill & Hazel bring a fresh approach to the subject together with their extensive knowledge of all things LEV — all of which is delivered in a lively, supportive and informal style.

The P604 course is particularly suited to LEV topic specialists, Health and Safety or Occupational Hygiene professionals, Managers, Supervisors and Building Services engineers (who have completed P601).

This is a four day LEV training course with self study elements (evenings).  The single (open book) Exam, which is taken on-line, consists of a mix of 35 short answer Theory and Practical questions, is on the final day .


***NOTE*** It is a BOHS requirement that delegates for P604 should have completed P601 (or at a minimum have passed both exams and be preparing Reports submissions) prior to attending.

Delegates should also possess a good working knowledge of HSE’s Guidance on LEV, HSG258 and must also be competent in basic maths/algebra (areas, square roots etc.)

No other specialist knowledge is required.

Who should attend?

Engineers, supervisors, managers, health and safety professional and technical staff who have day to day dealings with the specification, design, testing, contract management, and occupational hygiene aspects of LEV plant and who have previously completed the P601 LEV course module.

Towards professional recognition?

Success in P604 can be added to other BOHS modules e.g. P601, P602, P603 and W201 (in various combinations) to meet qualification and membership requirements of Institute of LEV Engineers (ILEVE).

It can also be used towards gaining the BOHS ‘Certificate of Competence in Control’ qualification which permits successful candidate to use the letters ‘CoC Control’ after their name. See BOHS for more details.

NOTE:  P604 has been re-grade at NQS Level 5 


Bill Cassells        BSc MPhil DSH CEng CMIOSH FIPlantE FSOE FRSPH RSP

Hazel Griffiths  BSc AFOH

P604 Course programme

Day 1

  • Hazardous substances and processes
  • Case studies
  • Workplace control principles
  • Hierarchy of control
  • Ways of achieving effective control
  • Main elements of ventilation systems
  • Basic design principles of LEV systems and their components
  • Fletcher’s Nomogram for predicting airflows/velocity contours
  • General ventilation systems.

Day 2

  • Ventilation systems and their performance evaluation
  • LEV Testing criteria and procedures (quantitative and qualitative)
  • Performance evaluation
  • Recognition of LEV failures and effects
  • Measurement techniques and instrumentation

Day 3

  • Assessment of control
  • Evaluation of LEV system measurements
  • Requirements for exposure monitoring (identification of need and methodologies)
  • Developing an LEV management system
  • Discussion on content of LEV manuals and logbooks
  • Commissioning documentation

Day 4

  • User training
  • Consideration of content and layout for reports submissions
  • Revision
  • Exam – 35 short answer questions (2.5 hours)


£1045 plus Exam fee £170 (+VAT) per delegate


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Please note all P604 Delegates must hold P601 prior to attending.

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