UCL SAFETY SERVICES
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1. HOW TO SELECT LEV

1. HOW TO SELECT

hazard sign

3 steps to selecting LEV:

  1. Consider the hazards for which LEV is required - what materials are you working with?
  2. Assess the risks by identifying the likelihood and consequences of exposure
  3. Identify the equipment that will provide adequate containment or extraction – the level of control must reflect the severity of risk

Ask yourself these questions:

  • Is the LEV suitably sized to allow comfortable working?
  • Is it able to extract the volume of air required?
  • Do you know what filters are required and how often to change them?
  • Does the LEV have suitable controls and indicator gauges / lights?
  • Do you know what the controls do and what the indicators mean?

When LEV doesn’t work as well as it should, a common reason is that the hood doesn’t catch or contain contaminants effectively. It is important to match the hood to the source that you want to control.

Types of LEV

 

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