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Bard 8403-082 is an OEM BrightStat room controller designed to manage Bard wall-mount air conditioner and heat pump operation with precise temperature control plus integrated motion sensing for occupancy based setback strategies. This controller is built for building automation integration using BACnet or Modbus, making it a solid choice for schools, modular buildings, and light commercial spaces where consistent control and network visibility matter. It supports optional add-ons like a ZigBee communication card and a CO2 expansion card so you can match the controller to the ventilation and connectivity requirements of the job. Use this part when you need a direct-fit Bard control replacement that maintains proper staging, fan operation, and occupied or unoccupied sequences on compatible Bard systems.