Abstract: An air treatment system comprising: an air purification assembly comprising one or more air purification modules and configured to, in an upstream to downstream order, take in air, produce purified air by conveying the air to traverse the one or more air purification modules, and expel the purified air, and an aerosol source configured to release a conditioning liquid in aerosol form into the purified air. Optionally, the conditioning liquid comprises a predetermined concentration of nonpathogenic micro-organisms. Optionally, one or more air purification modules comprises, in an upstream to downstream order, a HEPA or ULPA filter, a UVC irradiation unit, and an activated carbon filter.

Abstract: An air treatment system comprising: an air purification assembly comprising one or more air purification modules and configured to, in an upstream to downstream order, take in air, produce purified air by conveying the air to traverse the one or more air purification modules, and expel the purified air; and an aerosol source configured to release a conditioning liquid in aerosol form into the purified air. Optionally, the conditioning liquid comprises a predetermined concentration of nonpathogenic micro-organisms. Optionally, one or more air purification modules comprises, in an upstream to downstream order, a HEPA or ULPA filter, a UVC irradiation unit, and an activated carbon filter.