Stiebel Eltron Tempra 12 Plus Electric Tankless Water Heater

Stiebel Eltron Tempra 12 Plus

Our Price: US$528.35


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The 12 KW Stiebel Eltron Tempra 12 Plus tankless water heater is a popular, economically-priced point-of use tankless water heater used for low flow applications such as single sinks in restrooms, powder rooms, kitchens, low-flow pool house showers, emergency eyewash stations, etc. This model is not generally considered sufficient for whole house applications, even in warm climate areas.

Maximum Flow Rate in Gallons Per
Minute at 105F Output Temperature
  Incoming Water Temp:     Flow Rate (GPM)  
40F 1.3 GPM
45F 1.4 GPM
50F 1.5 GPM
55F 1.6 GPM
60F 1.8 GPM
65F 2.0 GPM
70F 2.3 GPM
75F 2.7 GPM
* This chart is based on 240v power input. Please see
brochure for temp rise chart based on 208v input.

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Brochure
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Like all Tempra Plus Series tankless water heaters, the Tempra 12 Plus features a digital temperature display and convenient dial selector which allows you to set the desired output water temperature at any level between 86 and 140F (30 and 60C). Most importantly, it is one of the only tankless water heaters on the market that features a true thermostatic temperature control and full power-modulation based on both the incoming water temperature and the water flow rate. In layman's terms, the Tempra 12 will automatically sense the water flow rate and temperature, calculate how much power is needed to do the job, and will apply exactly that much power so it can precisely maintain the desired output temperature regardless of whether the flow rate changes or not.

The Tempra 12 Plus also features dynamic Advanced Flow Control technology exclusive to Stiebel Eltron. If the heaters capacity is ever exceeded, this technology automatically adjusts the flow of water to maintain the desired temperature. This feature is particularly useful when a smaller unit than normal must be installed due to inadequate electrical service, or in cold climates. It is also desirable where high output temperatures are required for temperature critical applications (commercial dishwashers, etc.) and where flow rates are not always predictable.

The result is the most precise temperature control of any tankless water heater on the market today!

Stiebel Eltron Tempra 12 Plus Specifications

Thermostatically Controlled? Yes, digital temperature control and full power modulation based on flow rate and incoming water temperature.
Advanced Flow Control Technology? Yes, this unit will automatically regulate the flow rate if it's capacity is exceeded. This feature is exclusive to Stiebel Eltron Tempra Plus Series tankless water heaters!
KW 12 KW @ 240v / 9 KW @ 208v
Voltage: 208 - 240 volts / single phase / 50 - 60 Hz
Max. Amps: 50 AMPS @ 240v / 44 AMPS @ 208v
Breakers Required:*  1 x 50 AMP breakers (depends on local codes)
Wiring:*  Minimum #6 AWG Copper (depends on local codes)
Dimensions: 16.6 x 14.5 x 4.6" (42 x 36.7 x 11.6 cm)
Weight: 13.2 lbs (6.1 KG)
Pipe Fittings:  3/4" NPT
Energy Efficiency: 99%+
Activation Flow Rate: 0.37 GPM / 1.4 LPM
Max. Water Pressure:    150 psi
Max. Output Temperature:    140F (60C)
Max. Input Temperature:    131F (55C)
Warranty: Manufacturer's 3 Year Warranty
Safety: ETL Listed (USA & Canada) - complies with both US and Canadian safety standards including ANSI/UL499 and CSA-E335-1/3E-94.
Protection: microprocessor-based thermostatic temperature control (flow rate and temperature modulating) with thermal hi-limit cut-out switch monitoring each heating module

Please note: A minimum 100 AMP household electrical service is highly recommended and will likely be required to install this model. Most homes have at least 100 AMPS of service, however, if you are unsure of your electrical capacity in your home, please consult your electrician or contact us for assistance before ordering.

* Breaker size and wire gauge must meet all applicable local, state, provincial, and national electrical codes for your area - these are only guidelines that will apply to most installations. Some codes require use of electrical sub-panel for installation, especially when heater is not mounted within line-of-sight of the main electrical panel. Wiring should be sized to maintain a voltage drop of less than 3% under load. Please consult your electrician for more details.