Hi Aron I am thinking of installing 4 units of Aircon in my new house, I am deciding if I should go for 1x System 4 or should I get 2x System 2 instead, what do you recommend? Anyway, can you quote me the following? Mitsubishi Electric inverter system 4 Mitsubishi Electric inverter system 3 Mitsubishi Electric inverter system 2 Thanks