I am using carrier AC frm last 15 years. Recently I have bought 6 window AC of 2 tons for my office they all are working superbly without any problem. I already gpne through every AC company LG voltas Samsung whilpool but I decide to stay with carrier becuz of its quality. This is best A grade Aircodntioner company
B grade are LG, samsung, whilpool, B++ are voltas.
Other A grade are O generel, Hitachi, Hier., Toshiba, Bluestar, Daikin.
I simply suggest everybody to go with carrier without any hesitation. Its is little bit costly then B grade ACies.
But for long term its far better then others.