I think it is a great new product since it is effective
against virus. Few filters can do this but a good
purifier can (miox etc). You may know this site, but I
just discovered it and it is very helpfull in chosing a
filter or purifier:
http://chppm-www.apgea.army.mil/WPD/CompareDevices.aspxU.S. Army Center for Health Promotion and Preventive Medicine
did the largest test I have ever seen on this subject.
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