Westech Rigging Supply Q&AAnswer
Jun 08, 2020 - 12:58 PM
It really depends on the application. The general standard prior to COVID-19 was to use them until you felt breathing was impaired or restricted, thus indicating a fully used filter. But now with COVID-19, MSA (the product manufacturer) is recommending to discard after each shift, 8 hours, or daily, whichever is most applicable to you. Safety standards may also vary by jurisdiction, place of employment, etc.
