Air purification units for false ceilings or wall installation. Suitable for both built-in ductwork installation and as independent units.The main module comprises the following stages: G4 pre-filtration, fan(s), F7 ePM1 middle filter (50%) and H14 absolute filter (e≥99.995% s/EN-1822-1). Recirculation of indoor air through three stages of filtration ensures continuous purification of the indoor environment, removing particles and contaminants contained in it, such as: dust, pollen, spores, bacteria, viruses, and PM10, PM2.5 and PM1 fine particles.