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Standard WhisperRoom™ Ventilation Systems are quiet. However, the airflow noise (running at 80 CFM) is still slightly audible inside of a WhisperRoom™ sound isolation booth. This noise can be eliminated by the installation of a VSS. The number of VSS units needed depends on the size of the WhisperRoom™ model.
One VSS is required for each Standard Ventilation System. Each VSS consists of two additional exhaust ducts, with hoses and adapters, linked in-line between the standard exhaust duct and the remote fan unit (RFU).