Voltas is one of the oldest name in air conditioners manufacturers. Voltas is one of the part of the TATA Enterprise and is one of the largest supplier of engineering products and service provider for textile machinery as well. But just keep one thing in mind, buy the right tonnage capacity air conditioner as per your area requirement and every air conditioner will cool down your space.Build quality always differ between a higher and a lower price AC.However it is worth mentioning that Voltas was awarded “Empower Awards for Energy Efficiency” for manufacturing most energy efficient air conditioners, which is awarded by Urjavaran Foundation, a voluntary non-profit NGO