Stiebel Eltron CK 15E 120 Volt Wall Mounted Electric Fan Heater. The CK Electric Fan Heater from Stiebel Eltron offers a new exciting room heating alternative for new construction and renovation projects. This unit is an ideal replacement for recess-mount heaters. The design of the CK is both functional and stylish. The elegant curved shape is appealing and efficient. The vent for the CK blows toward the ground. This helps warm cold floors and also allows for optimum heat distribution. This is a 120V, 1500 watt unit.