Spoken with my brothers friend, an air-con repairman who was here recently to repair my air-con, about air-con thingy. His advise to those buying an air-con is to avoid xxxx and those with inverter technology. Inverter technology air-con, though save on electricy, costs more than the normal type and are costly to repair if breaks down. While a normal air-con can still function if one of the split unit is down, the whole inverter air-con system might knock out if there is any fault in any of the unit. Besides, inverter air-con contain electronic chip boards which can cost a few hundred dollars each to replace. So, whatever you saved on your electricity bills may not be enough to pay for the extra bucks you paid when you bought the air-con and repairs.