The term "in ducting" implies the process of moving something into a duct, such as a ventilation system. Antonyms for this phrase include "out ducting," meaning the process of moving something out of a duct or ventilation system, and "bypassing," which means avoiding the ducting system altogether. Other antonyms may include "extraction," which involves removing something from a location, and "diverting," which means directing something away from its usual path. Conversely, synonyms for "in ducting" include "ventilation," "airflow," and "air exchange," all of which involve moving air or other substances through a duct or ventilation system.