air conditioner; AC unit
Formal or technical term for an air conditioning unit; in everyday conversation, エアコン is more common.
This air conditioning unit has high energy-saving performance.
Please clean the air conditioner filter regularly.
Common abbreviation used in everyday speech; 空気調和機 is more formal and often seen in technical contexts.
Compound of 空気 (air), 調和 (adjustment/harmony), and 機 (machine).