
HEPA Filters Explained Simply: How They Work, What They Remove, and How to Choose One
Learn how HEPA filters actually work, what the famous 99.97% efficiency rating means, and why 0.3 microns isn't the smallest particle a HEPA filter can capture. This simple guide explains HEPA vs. MERV and activated carbon, what HEPA filters can remove, how CADR affects real-world performance, and what to look for when choosing an air purifier.









