The Greenheck 385253 Control Transformer is a reliable power conversion device designed for Greenheck HVAC systems. It operates with a 100–277VAC primary input and provides a stable 24VDC secondary output with 0–10VDC control signal capability, ensuring accurate power delivery to system controls. https://www.partshnc.com/385253-greenheck-100-277vacpri-24vdcsec-0-10vdc