Test bad air quality. know the fine particulate matter under 0.3um and 2.5um.
Result show temperature and weight at the same time on particle counter.
Check how air purifier clean the bad air before and after.
www.homehealthywater.com
www.skin-analyzer.com
www.ionaircleaner.com
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reprinted: http://homehealthywater.com/health-care-knowledge/1726.html
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