The temperature is controlled by the thermostate. The recommended room temperature is around 20 to 22 °C (68 to 72 °F).
Each radiator can be adjusted separately with a dial, turn it to '+' or '5' for a warmer heating, '-' or '1'' is almost off (both in your own room, the bathroom and living room).
Please think green and turn off the heating when you leave your room. The heating will turn off automatically at night.