residence, supermarket, hotel, hospital,office, dining room, recreation 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(m2)152025size300*300350*350400*400Retail price500600800 "Functions and features 1.Magnetic induction purification technology(national patent technology) 2. ...