Is it gases, viruses, bacteria, radioisotopes, dust or anaesthetics? Please answer, thank you so much!!
Answer:
Go to http://www.hepa-filters.biz/hepa-filters...
Read the definition of a HEPA filter then look below this and find Contents. Scroll down to #7. What HEPA Filters Can and Cannot Do. Click on it. This is where anyone can find it with a minimum of effort.
They won't remove those pesky in-laws.
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