“circular in-line duct fan for passageway No-3 and 4. Maker: HIPSON Model: EKD200-EC, Input Kw: 2.2Kw Speed: 2545rpm Enclosure IP: IP 44 Input voltage: 220V, AC, 60Hz,” Circular in line duct fan for passageway No-3 and 4. HIPSON.EKD200-EC.NA