Often it can be a simple thing, like the location of an air-conditioning unit that can be easily moved.
Times, Sunday Times (2016)
It frees indoor space, reduces electricity consumption and doubles as an air-conditioning unit.
Times, Sunday Times (2010)
It is not an air-conditioning unit.
Times, Sunday Times (2015)
He'd found a vacant lot behind the offices and an open door to a defunct central air-conditioning unit.
Robert Wilson INSTRUMENTS OF DARKNESS (2002)