Voltas is one of the oldest name when it comes to air conditioners manufacturers and is one of the most famous name in india .Voltas is famous because of its low priced Ac and has more sales on middle class consumers like us.As per your usage, some times compressor can demand for servicing early for these and you may end up paying for refilling of it once in a year or two.The service of these brand is also very good the representatives are behave nicely with consumers.It gives a decent and quality cooling with comparatively low price.