Air purification is full of marketing terms describing different technologies—but in reality, most systems rely on the same core filtration methods, just branded differently.

HEPA is the global standard for air filtration. It’s independently defined, tested, and regulated.

Within that standard:

• HEPA 13 captures ≥99.95% of particles as small as 3 microns
• HEPA 14 captures ≥99.995% of particles as small as 3 microns

Peer-reviewed research shows HEPA air cleaners significantly reduce indoor particulate matter. For example, the study “Efficacy of HEPA Air Cleaner on Improving Indoor Particulate Matter 2.5 Concentration” demonstrated measurable reductions in PM2.5 levels in real environments.

Yes. Lichen Air uses pure mechanical filtration (HEPA + carbon)—this was explicitly designed not to produce ozone or other harmful byproducts.

Our dual filtration system is designed to remove:

• Fine particles (dust, pollen, pet dander) 
• PM2.5 and airborne pollutants 
• Bacteria and other microbes
• Odors and VOCs (via activated carbon layer)

Typically every 6–12 months, depending on usage and air quality.

Your Lichen Air unit tracks performance and alerts you when filtration efficiency drops--no guessing.

Yes. The filter is designed for quick, tool-free replacement in seconds. You can watch the video above and see how to do it.

Yes. The activated carbon layer reduces odors from cooking, pets, smoke, and VOCs.

No. For performance and hygiene, filters are designed to be replaced, not washed.