HSE has carried out research using FFP3 respirators to determine whether acceptable face fit testing can be carried out using a flush port, as opposed to an extended port.

This research identified that conducting face fit testing with a flush port may result in a false pass, which could:

• cause the wearer to be exposed to substances hazardous to their health
• harm their respiratory health
  

View the research report in full

HSE's publication Guidance on respiratory protective equipment fit testing (INDG479) provides information on how the various face fit testing methods should be performed.

The research confirms that the current information is accurate. However, the guidance will be refreshed in due course to make it clear that HSE requires face fit tests to be conducted using an extended port. HSE will issue a separate ebulletin with this information.