Abstract: A cooling system circulates cooling air through information technology (IT) modules within a large scale information handling system (IHS). An air handling unit (AHU) directs cooling air through an IT module. The AHU is in communication with a controller. The controller is also in communication with an ambient condition interface to determine a level of a contaminant in outside air. The controller further: determines whether the level of the contaminant exceeds a threshold; and in response to determining that the level of the contaminant exceeds the threshold, configures the AHU to perform a mechanical cooling mode that excludes the outside air by recirculating air within an IT module via the AHU. In response to the level of contaminants not exceeding the threshold and other detected ambient conditions are favorable to using outside air to cool the IHS, the controller configures the AHU to use outside air.

Abstract: A cooling system that provides cooling air for an operating space of a large scale information handling system (IHS) by using an air handling unit (AHU) configured to direct cooling air through the IHS. A controller is in communication with an ambient condition interface and the AHU to cause the cooling system to (i) detect the outside ambient condition; (ii) determine whether the outside ambient condition has first condition values that support use of normal cooling mode or second condition values that requires/triggers a hybrid cooling mode; and (iii) in response to determining that the outside ambient condition has the second condition values, perform a hybrid mode mixing of the outside air with recirculated air to moderate the outside air to more efficiently cool the IHS. The cooling system is thus responsive to current/detected conditions and provides an operational mode that yields highest cooling efficiency for the existing ambient condition/s.

Abstract: A cooling system circulates cooling air through information technology (IT) modules within a large scale information handling system (IHS). An air handling unit (AHU) directs cooling air through an IT module. The AHU is in communication with a controller. The controller is also in communication with an ambient condition interface to determine a level of a contaminant in outside air. The controller further: determines whether the level of the contaminant exceeds a threshold; and in response to determining that the level of the contaminant exceeds the threshold, configures the AHU to perform a mechanical cooling mode that excludes the outside air by recirculating air within an IT module via the AHU. In response to the level of contaminants not exceeding the threshold and other detected ambient conditions are favorable to using outside air to cool the IHS, the controller configures the AHU to use outside air.