450 Series 1. Wide usage: It is special for family, office, bar, pub, club, hospital, hotel, school, kindergarten, laboratory and so on. 2.Advanced purifying system: It contains plasma filter generator, photo catalysis filter mesh, medical HEPA micro-filter mesh or active carbon filter mesh and negative ion equipment besides normal filter meshes. 3. Perfect purifying effect: With airflow volume up to 450m3/h, it can effectively remove mote, hair, dust, pollen, smoke, formaldehyde, benzene, ox nitride, virus and bacteria?s in a room of 45 m 2. 4. Automatic operation: It possesses automatic sensors, four levels of wind speed and 24 hours automatic control. xxxxx design: It has remote control and reminding indicators of washing and changing. 6.Patental product: It obtains patent of appearance design. xxxxx saving: It adopts frequency conversion and realizes energy saving. 8.Low operation noise: It can operate with noise less than 20dB(A). 300 Series 1. Wide usage: It is special for family, office, bar, pub, club, hospital, hotel, school, kindergarten, laboratory and so on. 2. Advanced purifying system: It contains normal temperature accelerating filter mesh, medical HEPA micro-filter mesh or active carbon filter mesh and negative ion equipment besides normal filter mesh. 3.Perfect purifying effect: With airflow volume up to 300m3/h, it can effectively remove mote, hair, dust, pollen, smoke, formaldehyde, benzene and ox nitride in a room of 20 m 2. 4. Automatic operation: It possesses automatic sensor, three levels of wind speed and 24 hours automatic control. 5. Convenient design: It has reminding indicators of washing and changing. 6. Potential product: It obtains patent of appearance design. 7. Energy saving: It adopts frequency conversion and realizes energy saving. 8. Low operation noise: It can operate with noise less than 20dB(A).