Galvanized Windmill Aerator System Solar 5 CFM of air and 21 wide ladder 5 CFM of air and still turn at low wind speeds due to our windmill heads higher torque 600lbs total) The 16' tower produces approximately 10% more aeration than the 12 FT tower height due to the elevated height of the tower The Wind Driven Aeration Systems offer:“BalCam II” technology minimizes bearing fatigue with new Stainless Steel componentsPatent pending new designFast & Easy AssemblyManufactured with high quality 18 gauge galvanized steelNewly redesigned blades and front dome assembly for better air flowSelf governing head to protect the unit in high windsNew secure locking mechanism that attaches the windmill head to shaftLarger check valves and upgraded ½” airline to handle the increased air that is producedHigh Air Output – 3