Just after a bit of advice..
We have an averaged size 4x2 with study and the only air conditioning/heating on the place is a split on the wall in the rear of the house.
The front of the house has master bedroom, theatre room and study, you then go through a doorway to the rear of the house which has open plan kitchen, meals, living, and then a corridor to the side with the other 3 bedrooms, bathroom, laundry etc.
The split is basically on the back wall of the house in the open plan area, but obviously it is not really hitting the front as well as one would like, and its not creeping down to the 3 back rooms.
We are considering putting in ducted reverse cycle, mainly focussing on the bedrooms and areas not directly covered by the wall unit. Would this be silly???
The other option is a couple more wall units but i dont really fancy having the fan/electrical boxes scattered all around the external of the house..
Opinions much appreciated!!