Ambient relative humidity levels between 45% and 50% are the most suitable for data processing operations in order to:
Provide an operating time buffer in the event of environmental control system failure
Help avoid failures caused by the intermittent interference from static discharges that occur when relative humidity is too low
Electrostatic discharge (ESD) is easily generated and less easily dissipated in areas where the relative humidity is below 35%. ESD becomes critical when levels drop below 30%.