LEV Central

The Knowledge Base for LEV

CoSHH Essentials: Control banding

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CoSHH Essentials: Controlling exposure to chemicals – a simple control banding approach Occupational hygienists and others colleagues use this CoSHH essentials control banding approach to identify suitable options for mitigating risks from substances hazardous to health. This approach is particularly useful where workplaces may hold a large variety of different hazardous substances.  The aim is…


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Second Edition, Published by HSE 2011 This is HSE’s current guide on LEV and related topics.  Here you will find recommended Duct Velocities, Captor Velocities, Face Velocities, and other design criteria. The various types of hoods, filters, fans and discharges are all described. Sections on Manuals and Log Books, LEV Examination and Testing protocols and…

Am I Required to Fit Hood Indicators & Gauges?

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OXYL8 have recently produced a paper which considers whether there is a need in law for hood indicators/gauges.  We know that HSE asks for these to be fitted but they also indicate in their LEV FAQ pages that there is no direct legal requirement. But how would the Courts view this?  We need to be…

ACGIH Manual of Recommended Practice for DESIGN: NEW 29th Edition!!

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NEW EDITION! NOW AVAILABLE! Now in its 29th Edition, the Manual will include even more information on combustible dusts, nano-particles, new air control techniques and fan design information, more example problems, and more suggestions for hood designs. Since its first edition in 1951, Industrial Ventilation: A Manual of Recommended Practice has been used by engineers, regulators…

HSW Act 1974 S6 “General Duties of Manufacturers etc as Regards Articles and Substances for Use at Work”

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Extract from Health and Safety at Work etc Act 1974 which spells out the duties and responsibilities of Manufacturers, Designers, Supplies or Imports articles (including LEV) and substances for use at work.  Useful checklist for anyone Buying or Designing, Manufacturing, Supplying any article related to LEV.

INDG136 – Working with substances hazardous to health: A brief guide to COSHH.

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This leaflet describes how to control hazardous substances at work, so they do not cause ill health. It will help you understand what you need to do to comply with the Control of Substances Hazardous to Health (COSHH) Regulations 2002 (as amended) which apply to the way you work with these substances. This leaflet provides…

L138 – Dangerous substances and explosive atmospheres.

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This Approved Code of Practice (ACOP) and guidance provide practical advice on how to comply with the Dangerous Substances and Explosive Atmospheres Regulations 2002 (DSEAR). These Regulations require the elimination or reduction of risk of fire and explosion from substances connected with work activities. The ACOP is primarily for an informed and experienced audience such…