Ask Dirk: 7 Reasons Your Air Filter May Not Work Correctly
Indoor air quality researchers tell us that particulate matter (PM), or particulates, which are invisible pieces of stuff floating around in the air, are bad for human health. Particulates that are 2.5 micrometers (0.0000025 m) or smaller, abbreviated PM2.5, are worse than larger particulates because they can penetrate deeper into the lungs and more easily find their way into your blood. The biggest sources of PM2.5 in most homes are outdoor air that finds its way into your home, indoor smokers, [...]