Fan Discharge Sound Attenuation
Up to 10 dB(A) Reduction!

The AT Fan Discharge Attenuator offered by EVAPCO is an additional option available to further reduce the sound level of the unit. The attenuator can be used with the standard AT fan or in combination with the Low Sound Fan option.

The AT Fan Discharge Attenuator is a factory assembled straight sided discharge hood designed to reduce overall discharge sound levels at full fan speed 5db(A) to 10dB(A), depending on specific unit selection and measurement location. It is constructed of G-235/Z-725 galvanized steel as standard (options available for Type 304 stainless steel) and includes insulated walls and a low pressure drop baffling system that is acoustically lined with high density fiberglass. The discharge attenuator is supported entirely by the unit and is shipped as an assembled section for easy mounting in the field. The discharge attenuator is covered by a heavy gauge hot-dipped galvanized steel fan guard to prevent debris from entering the attenuator.

The discharge attenuator will have a minimal impact on unit thermal performance (0%-2%) derate depending on specific unit selection.

The AT Fan Discharge Attenuator is available on ALL standard AT Cooling Towers, ATW and ESW Closed Circuit Coolers, and ATC Evaporative Condensers. It is also available on 12 ft., 14 ft., 24ft., and 28ft. (3.6m and 7.2m Europe) wide AT, ATW, ESW and ATC Models with the Low Sound Fan option.