| The Stiebel Eltron Tempra 20, with a maximum power output of 19.2 KW, is designed for whole house applications in regions where the incoming water temperature is above 60°, and is therefore suitable as a whole house water heater in the southern U.S. and in some warmer northern climates. It is also a popular choice for summer use vacation properties in northern climates where the electrical service does not permit the installation of a larger model. It is also frequently used as a point-of-use heater where more demanding flow rates are required.
Like all Tempra Series tankless water heaters, the Tempra 20 features true microprocessor-controlled temperature regulation and a convenient digital temperature display and dial selector which allows you to set the desired output water temperature at any level between 86 and 125F (30 and 52C). 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. The Tempra 20 will automatically adjust its power output to accommodate changes in the incoming water temperature and flow rate so it can precisely maintain the desired output temperature. The result is the most precise temperature control of any tankless water heater on the market today!
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See an internal view of the Stiebel Eltron tankless water heater - learn how it works and what makes it superior to the competition.
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 Stiebel Eltron Tempra Series Brochure (Adobe PDF)
 Electrical Requirements & Installation Information
Stiebel Eltron Tempra tankless water heaters are independently tested by ETL to comply with all US and Canadian safety standards, including ANSI/UL 499 (USA) and CSA-E335-1/3E-94 (Canada)
Stiebel Eltron is
Quality you can count on!
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Stiebel Eltron Tempra 20 Specifications |
| Thermostatically Controlled? |
Yes, digital temperature control and full power modulation based on flow rate and incoming water temperature. |
| KW |
19.2 KW @ 240v / 14.4 KW @ 208v |
| Voltage: |
208 - 240 volts / single phase / 50 - 60 Hz |
| Max. Amps: |
80 AMPS @ 240v / 70 AMPS @ 208v |
| Breakers Required:* |
2 x 50 AMP breakers (depends on local codes) |
| Wiring:* |
Minimum 2 x #8 AWG Copper (depends on local codes) |
| Dimensions: |
14.6 x 14.5 x 4.6" (37.0 x 36.7 x 11.6 cm) |
| Weight: |
18 lbs (8.1 KG) |
| Pipe Fittings: |
3/4" NPT |
| Energy Efficiency: |
99%+ |
| Activation Flow Rate: |
0.58 GPM / 2.2 LPM |
| Max. Water Pressure: |
150 psi |
| Warranty: |
Manufacturer's 3 Year Warranty |
| Safety: |
ETL Listed (US & Canada) - meets all applicable standards, including ANSI/UL 499 (USA) and CSA-E335-1/3E-94 (Canada) |
| Protection: |
microprocessor-based thermostatic temperature control (flow rate and temperature modulating) with thermal hi-limit cut-out switch monitoring each heating module |
* 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.
Please note: A minimum 125 AMP household electrical service is highly recommended and will likely be required to install this model. If you are unsure of your electrical capacity in your home, please consult your electrician or contact us for assistance before ordering.
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