Stiebel Eltron 231544 1500W, 240V CNS 150-2 E Wall-Mounted Convection Heater With its built-in thermostat a single CNS-E is perfect as a stand-alone heating system in bathrooms or small rooms Multiple units can be placed in larger spaces and their temperature settings can be adjusted individually for maximum comfort control CNS-E heaters work through natural convection ensuring draft-free operation CNS-E is designed with a frost protection setting. The lowest thermostat setting will maintain the room above freezing temperatures