Air moving devices, aerodynamic rotor, and methods

A method of moving air comprising:

• providing an air-moving device comprising:
• a motor;
• a drive mechanism coupled to the motor;
• and
• a rotor coupled to the drive mechanism, the rotor axially placed within a duct and comprising:
• a hub;
• a quantity of blades contiguously formed with and radially extend away from the hub, wherein the quantity of blades is in a range of 12-100 blades and the blades each have a blade aspect ratio between 1 and 10;
• and
• a shroud contiguously formed with and circumscribing the quantity of blades;
• and
• causing, via operation of the motor, the rotor to rotate with a blade passage frequency (BPF) in a range of 8-16 kilohertz (kHz) to create a fan pressure ratio in a range of 1.01-1.2, such that the rotation of the rotor results in a noise level of the air-moving device in a range of 30-70 A-weighted decibels dB (A) at a distance of at 50 feet.