The invention relates to a washing device for washing objects such as hands, and a heater and a method therefor. The washing device comprises: - a washbasin provided with an outlet an inlet for supplying water a heater connected to the inlet and configured to heat water supplied from the inlet and a sprayer connected to the heater and configured to spray heated water supplied from the heater into the washbasin, which sprayer comprises an atomizer for forming a spray of water droplets in the washbasin, wherein the heater comprises a body of a heat-conductive material, wherein a heating element for heating the body and a channel for carrying water for heating through the body are arranged in the body.
