Now I am going to giving my review on Voltas 1.5 Ton AC. Back up service and customer support is excelent from the side of VOLTAS company. They offers free installation service. Cooling efficiency is very high for this product. I suggest you to by the AC which gives Copper coil. Copper coil AC gives more efficiency. Quality comes with money-its 100% true that I realize after buying the VOLTAS product. I am very thank full to TATA group for giving us vest product quality.Thank you.