Air outlet serves as an important component in the ventilation system of many buildings, allowing air to flow out of a space for better circulation. However, there are various synonyms for "air outlet" that can be used in different contexts. These include air vents, air exhausts, air diffusers, air grilles, and air registers. Each term indicates a specific type of opening that helps regulate the flow and direction of air within a space. While they may have different technical meanings, each synonym serves the same purpose of aiding in the circulation and maintenance of air quality in buildings.