Topics include the basics of particulate capture, the tradeoffs between filtration efficiency, clean air delivery rate, and energy use, filter media types, and electret degradation.  If you want to learn about the role of filtration in delivering clean indoor air for your self, or if your role in society has agency in making sure your clients are breathing healthy air, you will appreciate what you learn here. Mark is a filter nerd with the ability to break things down and communicate clearly.