air duct system

例句：

1. 1. The new air duct system greatly improves the efficiency of our heating and cooling system.
   新的空气管道系统极大地提高了我们供暖和空调系统的效率。
2. 2.The air duct system in this room is designed to distribute fresh air evenly throughout the space.
   这个房间的通风管道系统设计用来均匀地将新鲜空气分布到整个空间。
3. 3.The air duct system was installed by a professional contractor, ensuring that it meets all necessary standards for indoor air quality.
   该通风管道系统由专业承包商安装，确保其满足室内空气质量的所有必要标准。