Matthew knows what he's talking about. We installed two Daikin US7s (2.5kW) at specific locations in our *2* star weatherboard house in 2015. Worst monthly winter bill $160 and summer $60 which includes all house electricity usage (We also have 3kW of solar panels on the current FIT). Compare this with the $550 it cost to run the gas ducted heating for 2 months in winter and you can understand why we're so impressed.