Terrui Industrial Circulation Fan◎PMSM motor, bring sgood heat emission,high efficiency(direct drive),big torque,long-life usage ◎Balanced5 stainless steel blades ◎Housing is made from heavy-duty, impact resistant polyethylene.One shot Roto-molded process brings the housing more strength and long-life usage, no rust forever ◎Large air volume,less noise gives more comfort to animals ◎With controller,can be contoller by APP, PC automatically as the temp and humidity