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Michigan Air Products - Online StoreCentrifugal Downblast Exhaust Fan, Model GB-140, Belt Drive, 1/2HP, 115V, 1Ph, 1173-1651 CFM
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G-100VG Downblast Exhaust Fan, Direct Drive, Vari-Green EC Motor, 115/208-230V 1PH, 477-1462 CFM - Buckley Associates
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NAKS 52B-DBFF-4000 Belt Drive Centrifugal Downblast Exhaust Fan - 4000 CFM, 951 RPM, 230V, Single Phase
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HVAC Service Call: 4 Downblast Centrifugal Exhaust Fans/Ventilators Not Working On The Roof - YouTube
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