Powerful output, compact design, remarkable energy-saving features: Our whole house electric tankless water heaters are made to perform to the highest standards in terms of comfort and reliability. Intelligent self-modulating technology continually ensures the least amount of energy is used to heat the water. Digital temperature display for easy, accurate temperature control and maximum energy efficiency. A Tempra 12 Trend provides hot water at a constant temperature for 1 bathroom in warm climates and for 1 low flow bathroom at a cabin or cottage in cold climates. See sizing guide to determine which model is best for you. Stiebel Eltron invented tankless electric water heating technology more than 90 years ago, and is still the industry pioneer and world leader. Our engineering and manufacturing tradition of excellence means you can depend on the performance and reliability of our products.