HVAC scrubber unit with building management system integration systems and methods

A non-transitory, computer readable media, storing instructions thereon that, when executed by processing circuitry, are configured to cause the processing circuitry to:

• receive a first input indicative of an outside air temperature of outside air;
• receive a second input indicative of an outside air contaminant level of the outside air;
• receive a third input indicative of a return air contaminant level of a return air routed from a conditioned space toward an HVAC subsystem controlled by the processing circuitry;
• and
• control, based on the first input, the second input, and the third input, the HVAC subsystem between:
• a first operating mode in which the return air is exhausted to an environment and a first supply air comprising the outside air is directed toward a space conditioned by the HVAC subsystem;
• and
• a second operating mode in which a second supply air comprising the return air is directed through a scrubber unit having a contaminant filter configured to sorb contaminants present in the return air and toward the space conditioned by the HVAC subsystem.

A heating, ventilation, and/or air conditioning (HVAC) system, comprising:

• an HVAC subsystem including a scrubber unit having a contaminant filter configured to sorb contaminants present in a return air;
• and
• control circuitry configured to:
• receive an input indicative of an outside air contaminant level of the outside air;
• control, based on the input and in response to the outside air contaminant level of the outside air exceeding a threshold contaminant level, the HVAC subsystem to a first operating mode in which the scrubber unit sorbs the contaminants present in the return air;
• and
• control, based on the input and in response to the outside air contaminant level of the outside air not exceeding the threshold contaminant level, the HVAC subsystem to a second operating mode in which the scrubber unit does not sorb the contaminants present in the return air.