The present invention relates to a washer (1) comprising a control unit (4) that controls the washing processes and comprises the start time and end time information of the cheap and expensive electricity consumption tariff determined by electricity distribution companies, a chamber (5) wherein hot water is stored to be used in the washing process performed at time periods during which expensive electricity tariff is applied, a hot water transmission line (6), one end of which is connected to the chamber (5) and the other end to the tub (2), providing the hot water in the chamber (5) to be delivered to the tub (2) in washing processes performed at time periods during which electricity is expensive and a chamber outlet valve (7) disposed in the hot water transmission line (6).
