Hitachi is one of the best AC .it is available very easy in any electronics showroom in market. Hitachi is also provide engineer for home service. its service good. it is also support on telephonic about any key problem. its cooling power is very good. it has no any sound during use. 11 degree temperature is sufficient in hard summer. it is super quality product. it is installed very easily. it is very long lasting product. its cost is very reasonable than other company . so I used Hitachi .and I also suggest my friend they use Hitachi.