Technically are increasing day by day. In past firstly there is only fan but after that technology increasing and then air coolers comes in the market. Now, Air conditioning comes in the market. There are many AC’s in the market. Some of windows AC and others is split AC. Here is talks about split AC. Its brand name is blue star. I also use this AC at our home. It is a 1.5 tone AC. Its running smoothly and also do cooling very fastly. It is a 5 star AC and our electricity bill comes very low. Nowadays, blue star company has made their good place in the market and its increasing day by day. That’s why, we can trust on this company. I suggest people should use this company AC.