Thank you for contacting us with regards to your model 8365 Thermostat. This model does not have the Progressive Recovery feature. And you are correct in your definition of the term. Without that feature, this means that the thermostat will adjust its set points based on the schedule that has been preset. If the new temperature is higher than the previous set point by enough degrees, the thermostat may call for the auxiliary heat to engage. Aprilaire thermostats with this feature that are similar to yours are the 8465, 8570 and 8600. With this feature, the thermostat will anticipate the next setting and activate the heating or cooling equipment early to reach the next set point at the scheduled time.
Please let us know if we can be of further assistance.