The BIGDOG® provides the cooling employees need in the summer while de-stratifying (pushing warm air down from the ceiling) in the winter to increase comfort and lower energy costs. One BIGDOG® fan replaces up to 20 smaller circulation fans and fits conveniently in corridors and between sprinklers. The BIGDOG® uses high volume, high speed airflow to move massive amounts of air. Cooling effect is due to the high velocity, compared to typical low speed ceiling fans. The BIGDOG® is engineered to provide over 60000 cfm of air movement and cool a 200 x 35 ft area. Schaefer BIGDOG® Air Circulator Fan, 3-Phase Non-Oscillating, 64500 cfm, 3 HP Power, 230/460 VAC, 8.7 A, 50/60 Hz Frequency, 6 Blades, 34.7 cfm/W Air Flow Efficiency, Belt Drive Control, Aluminum Blade, Fiberglass Housing Material, Ceiling Mounting, 72 in Dia Dimensions, Import