In most cases, a standard bedroom 2.5kW wall split air conditioner (up to 4x4m room) would cost from about $1500. For an average lounge room (up to 6x7m room), perhaps a 7.1kW wall split air conditioner system should do the trick with pricing starting from $2500. Remember this is an approximate guide and there are things to consider such as how much sunlight or heat is coming into these rooms, as well as the insulation in the ceiling and walls. This all works towards maintaining an optimum room temperature for your heating or cooling, increasing energy savings, and reducing the cost your power bill. Click here to find out more.