Leave it to Dyson to come up with the most beautiful, (pricey), and energy efficient fan. Using an airfoil-shaped ramp (like a cross-section through an airplane wing), airflow is amplified 15 times. Apparently this creates "smooth, powerful airflow," with no need for fast-spinning blades. Up to 5.28 gallons of air per second is drawn in by an energy efficient brushless motor.
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