1. A cooling system for a modular data center (MDC), the cooling system comprising:an air handling unit (AHU) that circulates cooling air through one or more information technology (IT) modules of the MDC;
at least one first air characteristic transducer positioned to sense a first air characteristic value of cooling air directed to the one or more IT modules of the MDC, the value being a selected one of: (i) a temperature value; and (ii) a humidity value of cooling air;
at least one second air characteristic transducer positioned to sense a second air characteristic value of the cooling air, the second air characteristic value being a next one of (i) the temperature value and (ii) the humidity value that is not the first air characteristic value, the temperature value of the cooling air directed to the one or more IT modules of the MDC;
a supplemental heater positioned to transfer supplemental heat to the cooling air before the cooling air reaches the one or more IT modules of the MDC; and
an AHU controller in communication with the at least one first air characteristic transducer and the supplemental heater, and which executes an AHU utility to enable the cooling system to:
determine whether either of the first or the second air characteristic value satisfies a respective first or second air characteristic criterion of a respective one of: (i) a temperature value equal to or greater than a minimum temperature threshold; and (ii) a humidity value equal to or less than a maximum humidity threshold; and
in response to determining that either of the first or the second air characteristic criterion is not satisfied, trigger the supplemental heater to warm the cooling air before the cooling air comes into contact with the one or more IT modules inside of the MDC to (i) provide cooling air above a minimum operating temperature and below the maximum humidity threshold of components within the one or more IT modules and (ii) prevent condensation.