Siebel Eltron Tempra 24 Electric Tank less Whole House Water Heater, 240 V, 24 kW. Set the knob on the front cover and enjoy water temperatures between 86 Degree (30 Degree C) and 140 Degree (60 Degree C). Change the desired temperature at anytime. No purchase of a remote selector control is necessary. Advanced microprocessor technology ensures that the water temperature never deviates from the set point.