A machine or unit that conditions air—controls temperature, humidity, and ventilation; often refers to large building HVAC units or air-conditioning equipment.
このビルの屋上には大型の空気調和機が並んでいる。
There are large air-conditioning units lined up on the roof of this building.
空気調和機は定期的なフィルター交換と点検が必要だ。
Air-conditioning units require regular filter changes and maintenance checks.
古い空気調和機は消費電力が高いことがある。
Older air-conditioning units can consume a lot of power.