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  1. I use the PC401, takes a reading every 3 secs for...

    I use the PC401, takes a reading every 3 secs for a minute then averages it.
    easy particle counter to use. here's the link,
    http://www.abatement.com/air-purifier/for-contractors-products-pc401.htm
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    Here's what the EPA says about PCO's and UVGI in...

    Here's what the EPA says about PCO's and UVGI in the air on this link.
    http://www.epa.gov/iaq/pubs/airclean.html#PCO%20cleaners

    Many of these white papers do a "sneeze test" and the unit is very...
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    Also good to revisit since more PHI's have come...

    Also good to revisit since more PHI's have come on the scene the past year or two.
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    Media is best value. polling - what's better for...

    Media is best value. polling - what's better for you, box pleated or expandable?
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    Partial bypass systems usually use HEPA media, a...

    Partial bypass systems usually use HEPA media, a more resistant media that needs blower assistance to filter to a lower size particulate. They also often have activated carbon that adds a high...
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