Indoor PM2.5 intake is always 4 times outside

Indoor PM2.5 inhalation, exposure is 4 times then the outdoor.
We spent more time indoor then outdoor. so we need to confirm the air quality.
The particle counter which can help you check fine particulate matters.
Check both the PM2.5 quantity and also the weight. to avoid disease.


The article is provide from [Lanjia Water Ionizer], please indicate the source address
reprinted:  http://www.ionaircleaner.com/health_and_environment/2324.html