Voltas is a big name. As its products are also so good. Its has amazing AC products . Its has copper coil.Copper CondenserThe condenser converts high pressure hot liquid refrigerant into cooler liquid by releasing heat into the outside air. The copper coil condenser supports better heat transfer as compared to aluminium coils. The durable coil lasts long and offers years of dependable use. Yhe cooling capacity is so good. We can say that it is amazing ac. Its is a product value for money. Its is amzing ac . Im using voltas ac personally . It is so good than other company.