What is HSG258?
HSG258 Health and Safety Executive Guidance HSG258 from the Health and Safety Executive Guidance on requirements for LEV, Local Exhaust Ventilation. It describes the principles of design, installation, commissioning, testing and examination of proportionate ventilation controls.
When should lev be used?
Local exhaust ventilation (LEV) is only one of many engineering control options that may be used to remove and prevent employee exposure to vapour, mist, dust or other airborne contaminants.
What is classed as Lev?
What is local exhaust ventilation (LEV)? Local exhaust ventilation is an extract ventilation system that takes airborne contaminants such as dusts, mists, gases, vapour or fumes out of the workplace air so that they can’t be breathed in.
What is a receptor hood?
Receptor hoods These are special types of captor hoods where the contaminants make their own way into the hood. Examples include: canopy hoods over hot processes (the hot air rises and makes its way into the hood) grinding wheel extraction.
How can airborne contaminants be controlled?
Infection Control for Airborne Contamination #1: Dust Containment
- Dust containment carts at small openings in ceilings and walls for maintenance.
- Anterooms to seal off entrances to rooms in which dust is being generated.
- Barrier wall systems to seal off large areas under construction.
What are the factors that reduce the efficiency of a local exhaust ventilation LEV system?
4 factors that reduce the energy costs of your local exhaust ventilation system
- Extract fumes and dust at the source of contamination with automatic dampers.
- Dimension the ducting to optimize transport velocity of the airflow.
- Keep the pressure drop in the filter at a low level.
How often does Lev need to be inspected?
every 14 months
The law is that the employer must maintain LEV system performance and should also arrange a thorough examination and test at least every 14 months.
What is the best type of ventilation for welding?
Local exhaust ventilation (LEV) is always the preferred method of removing welding fumes and gases. It exhausts or removes the toxic gases, fumes, dusts and vapours before they can mix with the room air.
How often should lev be inspected?
Is dust extraction a legal requirement?
There is a legal duty for employers2 to prevent or adequately control worker exposure to construction dust. On-tool extraction is an effective control for this dust and will reduce the risk of ill health. On-tool extraction is a type of local exhaust ventilation (LEV) system which is fitted directly onto the tool.
What is the most common type of hood?
Wall mount range hoods are one of the most common types of stove hoods. These vent hood types are mounted securely against a wall in the kitchen.
What enclosed hood?
Enclosing hoods, or “fume” hoods, are hoods surrounding the process or point where the contaminants are generated. Examples of completely enclosed hoods (all sides enclosed) are glove boxes and grinder hoods. Examples of partially enclosed (two or three sides enclosed) hoods are laboratory hoods or paint spray booths.
What is the hsg258 guidance on local exhaust ventilation?
The HSG258: Controlling Airborne Contaminants at Work: A Guide to Local Exhaust Ventilation (LEV) guidance explains how local exhaust ventilation (LEV) can help employers effectively control exposure to gas, vapour, dust, fume and mist in workplace air by extracting the clouds of contaminant before people breathe them in.
Is there a web version of hsg258?
This is a web version of HSG258 (third edition, published 2017). This version has been adapted for online use from HSE’s current printed version. The Health and Safety Executive work to protect the health and safety of people in the workplace by minimising risks.
How can your business comply with hsg258?
You and your business can comply with the HSG258 guidance by providing a comprehensive LEV system to control dust, fumes, vapours, gases and mists in the workplace. We offer a comprehensive LEV Installation and LEV Testing service. We’ll call to arrange a convenient time and date to visit your site.
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