Many don't realize that your home acts less like a sealed box and more like a breathing organism. Standard household fans—kitchen, bathroom, and even clothes dryers—force air out of the house. To maintain pressure, that air must be replaced, often pulling unfiltered, smoke-heavy air through every small gap and vent. Without a dedicated system to intercept this air, the concentration of fine particulate matter (PM2.5) indoors can reach dangerous levels in a matter of hours. |