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This apparent improvement in respiratory health may serve as a driving force for smokers trying to quit and lead smoke free lives

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I got 3-4 hours of wear time from this and the projection was moderate to strong

The World Health Organization (WHO) i nitiated this global observance in 1987

detailed records were obtained about the number and dates of deaths

Ways to Improve Effectiveness: Add a cardboard shroud No cost improvement Use thicker filters 4" rather than 1" MERV 13 filters Use multiple filters 2-5 filter design Key Reminders Only use certified fans with UL or FTL markings 2012 model or newer Keep extra filters on hand Replace filters when dirty