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Micro filter - question
Yesterday I had a discussion with friends about the filter quality of BMW's micro filters/fine dust filter elements.
Parts catalogue says: "In addition to the functions of a micro / activated carbon filter, the original BMW fine dust filter also filters the smallest particles such as bacteria, allergens and fine dust in the vehicle interior to a minimum."
We were asking ourselves if this might even filter out viruses like COVID-19 - which I don't believe.
But we could not find any detailed information about their exact specifications i. e. pore size or retention rate.
Would be interesting to know. Someone here to enlighten that?
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