Air circulator is developed to break up stratified heat, humidity and stagnant air inside the greenhouse, and ensure stable climate temperature.The compact size reduced the shading on plants, maximizing the light exposure.The unique propeller design is self-cleaning to reach the highest efficiency when operating and avoid maintenance and cleaning procedure.The housing of the fan is in  Protect, an extra protection against corrosion and the 6-blade propeller is statically and dynamically balanced for low noise and low vibration.Air circulator has been developed in  R&D test chambers, built in according to ANSI/AMCA 210-85 and verified by the BESS Lab at the Agricultural Engineering Department, University of Illinois (USA).