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Hot water for your whole house and comfort for your whole home.

Unlimited supply of hot water

The Tempra 12 continually heats water instantaneously as you require it - and only when you require it. The Tempra 12 unit completely replaces a conventional tank heater with no disruption to your comfort and hot water needs.

Save energy and reduce your electric bill

Electric tank type water heaters are subject to stand-by losses which amount to 15 - 20% of the kWH used. In addition, water in a tank has to be heated hotter than necessary to account for these stand-by losses. Changing to a tankless system like the Stiebel Eltron Tempra 12 eliminates these problems and results in typical savings of at least 15 - 20% on the heating portion of your electric bill.

Tempra 12, 15, 20, & 24 Sleek design saves space

The Stiebel Eltron Tempra 12 takes up considerably less space than conventional tank type water heaters and saves valuable living space.

Control temperature simply by setting a dial

Set the knob on the front cover and enjoy water temperatures between 86F (30C) and 125F (52C). Change the desired temperature at anytime. Advanced microprocessor technology ensures that the water temperature never deviates from the set point.

Better than gas

The Stiebel Eltron Tempra-12 has several advantages over a gas-type tankless water heater. Compared to many similar gas tankless models the Stiebel Eltron Tempra-12 is less expensive to purchase. Installation is also much simpler and cheaper since it is not necessary to vent a Stiebel Eltron Tempra-12 to the outside.

The venting that a gas unit requires causes anywhere from a 10 - 20% efficiency reduction from heat escaping out the exhaust pipe. Furthermore, for every cubic foot of gas burned, two cubic feet of air have to be mixed in to create ideal combustion. In a cold climate, this hurts efficiency further.

When a gas unit fires, it draws in air around it, heats the water, and then expels warm exhaust outside. Since no house is airtight, this suction action causes a drafting condition where cold air from the outside seeps back in through door cracks and other parts of the house that may not be airtight.

By nature of the design, the Stiebel Eltron Tempra 12 is nearly 100% efficient; converting 100% of the electrical energy it consumes into heat. All that heat is then transferred to the water - none is lost to the outdoors.

Proven reliability

Stiebel Eltron has an enviable track record of engineering excellence and product quality. The three years parts warranty is unique in the industry. You can depend on the Stiebel Eltron Tempra 12 for many years to come.

We have done our homework. As an international leader in the tankless electric water heating industry, Stiebel Eltron is proud to have pioneered this technology.

The company's German engineering and manufacturing tradition of excellence means that you can depend on its performance for many years to come.

Seismic proof construction

The Stiebel Eltron Tempra 12 is a tankless water heater system, and is thereby not subject to seismic code. There is no need for preventative construction, as required when using a tank type water heater.

Superior, reliable performance

The Stiebel Eltron Tempra 12 has several temperature and flow sensors which feed their readings into the units proprietary microprocessor control. Heating elements are engaged in stages, achieving the temperature you desire. The Stiebel Eltron Tempra-12 continually monitors the water temperature it produces.

Tempra™ Tempra 12 Sizing Chart

Tempra™ Technical Data
Tempra™ Model   12 15 20 24 29 36* Phase   1 1 1 1 1 1 Voltage V 208 240 208 240 208 240 208 240 208 240 208 240 Wattage kW 9 12 10.8 14.4 14.4 19.2 18 24 21.6 28.8 27 36 Amperage A 44 50 52 60 70 80 88 100 105 120 132 150 Min. required circuit breaker size A 60 60 2x40 2x40 2x50 2x50 2x60 2x60 3x50 3x50 3x60 3x60 Recommended wire size AWG COPPER 6 6 2 x 8 2 x 8 2 x 8 2 x 8 2 x 6 2 x 6 3 x 8 3 x 8 3 x 6 3 x 6 Maximum temp. increase @1.50 GPM 41 54 49 65 66 88 82 92 92 92 92 92 above ambient water temp. @2.25 GPM 27 36 37 43 44 58 54 73 66 87 82 92 @3.00 GPM 20 27 25 33 33 44 41 54 49 66 61 82   @4.50 GPM - - - - 22 29 27 37 33 44 41 55 Min. water flow to activate unit GPM / Lmin 0.29 / 1.1 0.58 / 2.2 0.58 / 2.2 0.58 / 2.2 0.87 / 3.3 0.87 / 3.3 Weight Lb / Kg 15 / 6.8 18 / 8.1 21 / 9.5 18 / 8.1 24.25 / 11 24.25 / 11 Nominal water volume Gal / L 0.13 / 0.5 0.26 / 1.0 0.26 / 1.0 0.26 / 1.0 0.39 / 1.5 0.39 / 1.5 Width inch / cm 14 9/16 / 37 21 3/4 / 55.2 21 3/4 / 55.2 Height inch / cm 14 1/2 / 36.7 Depth inch / cm 4 5/8 / 11.6 Working pressure PSI / BAR 150 / 10 Tested to pressure PSI / BAR 300 / 20 Water connections 3 / 4" NPT * Tempra™ 36 requires a 300A minimum electrical service