Hitachi is a Japanese company .every one are known the the name of Hitachi .I used the Hitachi ac.the cooling us so gud, in india many ac are bold out in the month of June or July , the temp is so rise many ac is bowled but Hitachi ac is working in the month of June.the maitanance, reliability, service process is gud.full satisfaction provided by the Hitachi service center I will give the 4.5 rating from 5.this is gud ac .