Queensland has very hot summer and thus almost every modern homes and new builds have Air Conditioning installed either the central ducted system or split system. The reverse cycle is popular due to their usage as it can be used for heating as well. The Air Conditioners also have inverters and they have variable motor speed to suit the condition therefore cheaper to run. The energy rating on the systems are marked and most of them have good rating usually four and above. More stars mean more energy efficient .