Patent ID: 8831785

Claim:
A system to control humidity in a fluid flow supplied to at least one information technology apparatus, said system comprising: a sensor to detect an environmental condition of the fluid flow; a first stage apparatus to vary humidity levels in the fluid flow; a second stage apparatus positioned downstream of the first stage apparatus, wherein the second stage apparatus is to further vary humidity levels in the fluid flow; and a controller to: receive the detected environmental condition of the fluid flow from the sensor; determine whether the detected environmental condition indicates that the humidity level in the fluid flow is outside of a first predetermined humidity range; in response to a determination that the humidity level of the fluid flow is outside of the first predetermined humidity range, manipulate an operation of the first stage apparatus to vary the humidity level in the fluid flow; determine whether the detected environmental condition indicates that the humidity level in the fluid flow is outside of a second predetermined humidity range different than the first predetermined humidity range, wherein the second predetermined humidity range is within the first predetermined humidity range; and in response to a determination that the humidity level of the fluid flow is outside of the second predetermined humidity range, manipulate an operation of the second stage apparatus to vary the humidity level in the fluid flow.