This module is designed to control a proportional minimum outdoor air damper. The module is used to provide a minimum outdoor airflow. During normal operation, the minimum OA damper is either closed or at its operational position. The module also accepts a Mode input, a minimum OA position input which allows the minimum OA damper position to be reset externally, and a ramp rate input. The module outputs a 0% to 100% control signal to a proportional minimum OA damper.