Covid HEPA mask - protection

thingiverse

This project combines elements from two existing ventures. The face mask design originates from item 4225667, while the filter adapter system comes from item 4222563. The filter cover is specifically designed to be compatible with item 4222563. I redesigned this project because I require larger HEPA filters than those used in item 4222563, and for my personal comfort, the face mask design from item 4225667 provides optimal results. Here are some key facts about HEPA filters: • HEPA H14 filters capture at least 99.995% of particles measuring 0.1 microns per liter of air. • HEPA H13 filters capture at least 99.97% of particles measuring 0.1 microns per liter of air. • HEPA H12 filters allow more than 0.3% of particles measuring 0.1 microns to pass through per liter of air. • HEPA H11 filters allow up to 5% of particles measuring 0.1 microns to pass through per liter of air. • HEPA H10 filters allow more than 15% of particles measuring 0.1 microns to pass through per liter of air. Source: https://www.airfiltersupplier.com/products/hepa-air-filter.html All information from items 4225667 and 4222563 remains valid.