Not quite, one big one that cools upstairs and falls downstairs, one that runs in the living room, one for the lean to, one in the garage, one spare portable unit, and one huge MF that I intend to put in one day that will have outlets in each room and be fed with fresh outside air rather than recycle the inside air, but to put that in I will need to have had three weatabix and a month clear.
So in real terms we run two air con units in the warmer weather, another if it is hot in the garage and I am working there, and one for when there are a lot of people visiting or it is really warm.
The real advantage is that even in mid summer we still sleep comfortably wrapped in a duvet, rather than all the windows open, gnats biting our sweating bodies, which is what most of the population seem to be happy doing.
Mrcheerful