Theroofventilationfanappliesthetheoryofconvectionbetweennaturalwindandairtoaccelerateandtransformanyparallelairflowintoverticalsoastoimprovetheindoorventilation.Thehotairrisesandcoldairfalls,whichmakesthefanrotate.Sotheindoorheat,stinkanddustareexhaustedeffectively.Italsocaneffectivelyremoveindoorsoot,***oke,odor,moisture,heat,decorativeharmfulgas,dust,humanmataboli***andotherdirtyvolatilemixed-dopedodoraswellasvirusedandbacteriainvasion.Asaresult,itimprovestheworkingenvironment,protectsworkers'healthandenhancestheworkingefficiency.Itiswidelyusedinwarehouse,toilet,factory,workshop,stadium,tennishall,assemblyhall,garage,papermill,galvanizationfactoryandcoatingfactory.Advantages:1)High-efficiencyventilation2)High-qualitystainlesssteelbody3)Easyandfastinstallation.4)Environmentalprotection,energys***ingandnoelectricitycost.5)stableanddurable,dehumidification,anti-sweatandrain-proof.6)Highsensitivityandnonosie.7)AlltheventilatorsadoptAmericanUBCbearings,freelubrication.Supportingbracketsareallmadeofstainlesssteel,whichhasverygoodcorrosion-resistantability.Specification:ModelNo.:AP150mmMaterial:AluminiumAlloyNumberofBlade:20PCSTotalHeight:330mmTurbineDiameter:330mmVentilationDiameter:150mm)