HC30-15 Manual thermostat with temperature limitation and light indicator Simple operation – dial on the front panel On/Off switch on the front panel Floor temperature limit – protects wooden floors Integrated room sensor HC30-15 is a manual On/Off thermostat with temperature limitation, power regulator, and light indicator. The temperature can be controlled in one of three ways: using an external floor sensor, the built-in room sensor, or a combination of both. Supplied with a 2.5 m floor sensor.