P602 Basic Design Principles of LEV Systems

£1,075.00 +VAT

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Delegate Names *

Exam Fee *

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SKU: P602 Category:


P602 Course overview

This competence-based LEV training course follows the BOHS P602 LEV Basic Design Principles syllabus.

It is designed to provide the methodology, theoretical and basic practical knowledge to enable delegates to be able to design basic LEV systems which will control hazards.

It provides delegates with the basic skills to be able to specify LEV system, including calculating an appropriate Benchmark for correct hood selection, using Fletcher’s Nomogram for captor hood design, calculating system pressure losses and specifying an appropriate fan.

The course also covers the base requirements for LEV Commissioning, Examination and Testing and the preparation of suitable records.

Learning objectives

After completion of the P602 training course delegates should be able to:

  • Demonstrate awareness of principles of good control practice and the role of LEV
  • Understand the importance of design considerations and the basic principles and main elements of an LEV system
  • Design basic LEV systems
  • Undertake Commissioning tests to determine if the system is effective and operating to design specification
  • Prepare suitable records of the basis of design.


It is assumed that delegates attending the P602 LEV course will have had day-to-day dealings with Local Exhaust Ventilating plant.

Delegates must 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.

Towards professional recognition and qualification?

The P602 qualification can be added to other BOHS modules e.g. P601, P603, P604 and W201 (in various combinations) to gain further professional recognition through BOHS, e.g. Certificate of Operational Competence in Control – which permits the successful candidates to use the post-nominal letters ‘CoC Control’ after their name.

In combination with the remaining P600 series of LEV training courses (and W201) candidates may also be eligible for membership of BOHS as Licentiate of the Faculty of Occupational Hygiene (LFOH). See BOHS for more details.

Successful qualification in P602 LEV Design also meet various membership levels for the Society of Operations Engineers (SOE) and the Institute of LEV Engineers (ILEVE).



P602 Course programme

Day 1 – Workplace Control Principles

  • Sources of exposure
  • Hierarchy of control options
  • Practical application of control measures
  • Testing for adequacy/performance evaluation
  • CoSHH risk assessment implications
  • Types of systems in use
  • Hood design
  • Duct design (sizing/configuration/design)
  • Fans (types/specification/applications/design limitations).

Day 2 – Design of LEV Systems (1)

  • Filtration (specifying/performance characteristics/limitations)
  • Balancing systems
  • Flammable materials
  • Discharge arrangements
  • Make-up air/replacement air
  • Recirculation systems
  • Behaviour of hot plumes
  • Use of instruments and flow visualisation techniques
  • Fault diagnosis.

Day 3 – Design of LEV Systems (2)

  • Calculation of pressure losses
  • Fan selection
  • Design Exercise 1 – simple two branch system
  • Design Exercise 2 – design of more complex multi-branch system
  • Course review.

Day 4 – Examination/Assessment

  • Review and revision
  • Short form answer examination.

Book a place on this course


£1075 (+exam fee £165) + VAT / delegate

Follow on course

The P604 Performance Evaluation and Management of LEV Systems course follows on from this P602 course.

Re-sit examinations

We work with all our students to try and ensure a pass first time.  Our pass rate is excellent but a re-sit may on occasion be necessary. If you require an exam re-sit booking then contact us here or call 01479 872 518 or (07970) 754 632