A system for multi-stage control of humidity in fluid flow supplied to at least one information technology apparatus includes a sensor, a first stage apparatus configured to vary humidity levels in the fluid flow, and a second stage apparatus positioned downstream of the first stage apparatus along the fluid flow to further vary humidity levels in the fluid flow. The system also includes a controller configured to receive environmental condition information from the sensor, to determine whether the information indicates that the humidity level is outside of a predetermined range, and to manipulate an operation of at least one of the first stage apparatus and the second stage apparatus to vary the humidity level in the fluid flow in response to the information indicating that the humidity level is outside of the predetermined range.