HEPA filters try to remove particulate matter from the air by catching them. To understand how HEPA works, think of it as a mesh of tangled fibers. Air flows through the fibers and large enough particles get trapped. The filter's efficacy is fully dependent on the size of the pollutants.
VOCs, viruses, and some other allergens are far too small for a HEPA filter to catch them. Larger pollutants like bacteria and mold can be caught, but continue to live on the filter surface. Bacteria will eventually die and release harmful endotoxins back into the air. Mold is an even bigger concern, as it will feed on other trapped particles, grow on the filter surfaces, and release new spores into the air stream.
Molekule's PECO technology does not trap, but rather destroy pollutants that pass through the filter. A nanoparticle coating on the filter, triggered by light, produces free radicals that break down the molecular structure of any organic compound in a single pass.
Molekule is the only technology that, unlike HEPA, works on the broad spectrum of pollutants regardless of how small they are.