Last summer I had bought a Maharaja Whiteline Thunder Personal Purifier. I bought it from Vijay Shruthisharma @ Rs 5600. The purpose was to use it in the master bedroom which is approx 150 sq ft.
The personal air cooler does a great job in such a small area. It gives instant cooling. It produces very low noise. It power consumption is also very low.
The only drawback that I observed was its body build quality is not that great and got cracked when it fell from just 2 feet height.Rest it is totally worth its value and ideal for bedrooms, not for large living areas.