Original design drawings no "Exhaust Fan", according to the actual situation, the construction and supervision units scene investigation decision, elevator machine room to increase "Exhaust Fan", specification model: AWE-250E4,1010m³ / h, 6w, 220v, 0.3A , 1.5uF, 1400rpm, 54dB, 7.8Kg. Elevator machine room floor roof, original design drawings elevator machine room fire in the west, the east side of the room were passenger and cargo ladder design of this fan hole size, hole caused by civil Unreserved on Shear. After negotiation with the Party, over "Exhaust Fan" installation position changing, fire elevator room fan model specifications: AWE-250E4,1010m³ / h, 6w, 220v, 0.3A, 1.5uF, 1400rpm, 54dB, 7.8Kg, totaling 1 station. East side passenger elevator machine room fan model specifications: AWE-400E4,4500m³ / h, 250w, 220v, a total of 1 units.