Choosing the correct filter can seem quite complex with the range of colour coding and wide range of choices available, but here are a few tips.

Particle Filters

Particulate matter – dust, mist, sprays, aerosols and fumes – require particle filters. The smaller the particle the higher the efficiency needed to protect you.

These are colour coded white and abbreviated to a ‘P’ for particle filter.

Three grades of particle filters are available according to their efficiency:

  • P1 = Low Efficiency 80% – APF 4
  • P2 = Medium Efficiency 94% – APF 10
  • P3 = High Efficiency 99% – APF 20

In most instances the HSE recommend P3 filters where a particle filter is recommended.

Gas and Vapour Filters

For protection against gases or vapours a number of filter options are available in different colours for hazards, and grades for the number of contaminants they can hold.

  • 1 – Low Capacity
  • 2 – Medium Capacity
  • 3 – High Capacity
  • A = Organic Gases (Brown)
  • B = Inorganic Gases (Grey)
  • E = SO² and other Acid Gases (Yellow)
  • K = Ammonia (Green)

Combination Filters

Combination filters are available for environments where multiple hazards are present.

If you are unsure of the filter you require, please contact us or call our team of RPE experts for advice on 01933 672 180 or email info@fullsupportgroup.com.