Ion discharger: charges particulates negatively, which will be adsorbed to the electro-positive dust collector (no replacement cost, easy to clean, powerful dust-collecting ability, 3 settings: refreshing, purification, and sterilization ozone is generated in the sterilization mode) Dust collector: collects particulates, and kills bacteria with high voltage electricity (optional: PECI tech (under development)) Nano TiO2 photocatalyst filter: generates perhydrol (H2O2) and hydroxyl (OH) under the irradiation of UV light, sterilizes, and decomposes toxic chemicals (TiO2 mterial, 3D nano structure: 20 times more contact area than ordinary photocatalyst filters) Ultraviolet (UV) germicidal lamp: activates photocatalyst oxidation (PCO), sterilizes air (recommended to be replaced every 15,000 hours) Nano TiO2 photocatalyst filter: generates perhydrol (H2O2) and hydroxyl (OH) under the irradiation of UV light, sterilizes, and decomposes toxic chemicals (TiO2 material 3D nano structure: 20 times more contact area than ordinary photocatalyst filters) Negative ion generator