Honeywell H205A-1012 Enthalpy Control Relay Module is a dedicated HVAC control accessory that implements enthalpy-based economizer logic. As a relay module, it provides the switching required to actuate outdoor-air dampers or related equipment based on enthalpy decisions within the control system. The H205A-1012 is used in commercial installations to optimize outdoor air usage by comparing enthalpy of outdoor and return air, supporting energy-efficient ventilation and cooling strategies.
