The world’s first, completely natural, biodegradable, secondary filter for ventilation systems that uses ultra-thin fibers to create a healthier indoor air environment. Nanofibers have huge benefits for air filtration — smaller fibers provide greater surface area and, thus, higher efficiency (rating F8 >90%). This diffuser filter uses a continuous electrostatic web of nanofibers (40 km, 0.6 mile long) to prevent triggers of asthma and respiratory allergies, such as microscopic bacteria, molds, and dust particles from the air. Similar to a spider web, Van der Waals forces help to pull in even the finest particles, trapping them in the dense nanofiber web and preventing them from escaping into the environment. These nanofibers are electrospun onto the surface of a 100% biodegradable ‘potatopak’ base made from potato starch; they are then infused with bio-based, antimicrobial additives. The natural antibacterial and antifungal activity of the Manuka plant (tea tree native to Australia and New Zealand) extrac takes over to neutralize the trapped particles. Applications are as durable filters for ventilation systems that are applicable to HVAC and personal protective equipment, as well as for the automotive industry.