Filter is inserted into the mask and replaced every 4 to 5 days
The filter unit passed under ISO8 conditions for 0.5 and 1.9 micron and ISO7 for 5 microns (according to
ISO14644 standard) the micro-particle count indicated an efficiency rate of more than 95% for particles 5μm. For
the IPU D15 filter. The rating improved for IPU D15 tested in combination with the fabrics for the mask. 100% of
particles > 5μm were filtered.