O. INLINE FAN / Inline duct fan APPLICATIONS -. HYDROPONICS -. BATHROOM EXHAUST, DRYER BOOSTER, DUCT BOOSTER -. KITCHEN EXHAUST, RANGE HOOD -. GENERAL VENTILATION O. MOTOR -. EXTERNAL MOTOR -. 115-120V 60HZ, 220V 50HZ, 220V 60HZ -. PROTECTION CLASS OF ENCLOSURE : IP44 -. INS. CLASS ; B OR F O. MODEL NO. -. BIO-100-2SS (4" FANS) -. BIO-150-2SS (6" FANS) -. BIO-200-2SS (8" FANS) -. BIO-250-2SS (10" FANS) -. BIO-300-2SS (12" FANS)