LHM Universal HEPA Filter (covid-19)

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I DESIGNED A CUSTOM HEPA FILTER USING A STANDARD HEPA VACUUM CLEANER FILTER AND SOME 3D PRINTED PARTS. BE ADVISED THAT THIS FILTER IS CURRENTLY IN PROTOTYPE STAGE AND HAS NOT BEEN TESTED OR APPROVED BY ANY FIELD SPECIALIST, SO USE IT AT YOUR OWN RISK. THIS FILTER CAN ALSO BE USED ON DIFFERENT 3D PRINTED MASKS AS LONG AS THEY HAVE A ROUND HOLE WITH A DIAMETER OF 40MM. THE FILTER CLASSIFICATION IS HEPA10 OR 11, WHICH SUGGESTS THAT IT HAS A FILTERING EFFICIENCY BETWEEN 85% AND 95% FOR PARTICLES BIGGER THAN 0.3 MICRONS. IT'S IMPORTANT TO NOTE THAT NOT ALL HEPA FILTERS HAVE A 99.9% EFFICIENCY RATE. FOR MORE INFORMATION ON HEPA FILTERS, VISIT WIKIPEDIA AT HTTPS://EN.WIKIPEDIA.ORG/WI/HEPA. THE BEST FEATURE OF THIS PROTOTYPE IS THAT YOU CAN USE A HEPA FILTER CUT OUT FROM DIFFERENT FILTER MODELS WITH HIGHER CLASSIFICATIONS, AS LONG AS THE FOLDS ARE 13MM OR SMALLER.