Our suggestion is to block the top discharge louver by using a centrifugal cooling tower fan unit like SPX MCW, so the cooling towers utilize side discharge and intake only. A reference noise level from MCW 1000 ton with build in sound attenuator (4 fans per cell) is only 70 dBA at 1.5 m instead of 87 dBA at fan discharge. The noise level with centrifugal fan Cooling Tower is expected to achieve approximately 60 dBA level or lower at balcony.