noun
air conditioning equipment; air conditioner
Refers to the equipment or system for air conditioning, not just a single unit. Often used in technical or building contexts.
このビルは空調設備が古いので、夏はとても暑い。
This building's air conditioning equipment is old, so it gets very hot in summer.
エアコン is the common everyday term for an air conditioner unit, while 空調設備 is a more formal or technical term for the whole air conditioning system or equipment.
Compound of 空調 (air conditioning) and 設備 (equipment, facilities).