Hi Aron, can kindly quote me for an Inverter system 4 air con for 4 bedrooms and an Inverter system 1 air con for the living room as from what I know, there is no system 5 right? what are the recommended brands? Panasonic, LG or Mitsubishi star mex? Among these brands, can recommend me 1 that is both good(lesser customer complaints so far, from your knowledge) and at the same time cost effective. Thanks. you can email me the quotation to c3chris82@yahoo.com.sg. Thanks a lot:)