Hertz: 50 Hz & 60Hz. Output Range: 4,190 to 43,500 CFM. Air Flow on Low Speed: 4,956 CFM. Air Flow on High Speed: 7,080 CFM. Industrial Heavy Duty Exhaust Fan. Motors Speeds: 1 & 2 Speed Models (2 Speed Motors Available on 1 Phase Fans, 1/2 Hp and Below).
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