Ducted systems are typically much larger machines than wall splits, as they usually heat entire houses or office spaces instead of single rooms, so the power consumption is higher, but overall, the way that the air is circulated around the space makes it much more efficient than a wall split system. One advantage of ducted air conditioning is the way that the air is circulated. By blowing through insulated duct to each corner of the house and circulating back to the return air grille; this causes much smoother airflow pathways and saves energy this way.