Covid mask "PROFI" VERSION , Hepa filter 25nanometers - with 3 vents

grabcad

Hi again, as promised ,here is "PROFI" version of my previous upload. This version keeps Hepa filter dry whole day, because mask is using 1 income vent and 2 outcome vents..so air flow is driven exactly how it should.To complete it You need :1) print all stls2) glue filter body on mask3) glue 2 outcome vent housings to mask (on each side 1pc)4) insert 3 vents from Decathlon (saled as spare kit with 3 vents for 2,7 USD here in CZ).You need to mount 1vent from inside of mask , 2vents from outer side of the vent holders..5) buy sealing dia 8mm for sheetmetal (with rib) , mount and glue it on the mask edge..6) buy rubber lines to hold whole system on Your head.-)7) buy filter Hepa for acumulator vacuum cleaner (same as previous upload).Cleaning the filter:1) use UV-C lamp to desinfect2) use ozone/plasma air ventilator from home infa sauna (for example)3) use another way of Your best desifection (dont use liquid to not open 25nm holes to bigger!)all is tested and working !.-)Enjoy!Comments are welcomed..Radek