... area and so on.Together with air conditioning ventila Feature Description BWL air vent air filtermodelBWL-300BWL-350BWL-400disposal air volume(m3/h)400500600suitable space ... disassembly and Cleaning. 5.Full of negative ion, making indoor air fresher 6.No consumption, low energy consumption" Application Field ... , dining room, recreation area and so on.Together with air conditioning ventilation system .