AVON PROTECTION APR SIZING/FITTING

Q:  The instruction manual for my Avon Protection C50 APR says that my mask is too big for my head (my eyes are slightly lower than the mask's line on top of the nose) but when I do the pressure test the mask seals around my face without letting air enter from anywhere.

Should I consider that it's the right size, or should I get a smaller size?

A:  While your negative pressure test indicates a good seal, the most reliable way to confirm the correct mask size and fit is through a formal quantitative fit test. 

For workplace compliance in the UK, please refer to HSE INDG479.                                                             Guidance on respiratory protective equipment (RPE) fit testing - HSE

In the USA https://www.osha.gov/laws-regs/regulations/standardnumber/1910/1910.134AppA

Appendix A to § 1910.134 - Fit Testing Procedures (Mandatory)

Part I. OSHA-Accepted Fit Test Protocols

A. Fit Testing Procedures - General Requirements