Stiebel Eltron Tempra Series Tankless Water Heaters
The Stiebel Eltron Tempra Series electric tankless water heaters are the most sophisticated thermostatically-controlled on demand, instantaneous water heaters available on the market today.
Stiebel Eltron Tempra Series offers models ranging from 12 to 36 KW in power, to meet a wide range of point-of-use, whole house, as well as commercial applications. Each model features Stiebel Eltron's advanced microprocessor technology which constantly monitors the water flow rate and incoming water temperature and adjusts the power level to maintain a precise output temperature as selected by the user.
A simple adjustment dial on the front of the heater allows you to set the output water temperature to whatever temperature you desire between 86 and 140F (30 to 60C)[Note, maximum temperature setting on some models is 125F (52C)]. To learn more about what makes Stiebel Eltron tankless heaters superior to its competition, visit our comparison of tankless water heater technologies page.
Selecting a model for your application is largely dependent on your incoming water temperature, flow rate requirements, and what features you desire. Please view our Tankless Water Heater Model Selector Page for proper sizing information. The specifications of each Stiebel Eltron tankless water heater model is noted in the chart below - click on the name of the heater for more details.
Stiebel Eltron tankless water heaters are designed to completely replace a conventional hot water tank.
Stiebel Eltron Tempra Series Specifications |
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| Tempra 36 | Tempra 29 | Tempra 24 | Tempra 20 | Tempra 15 | Tempra 12 | |
| Application | Extreme North and/or Very High Flow Rates | Northern Regions or High Flow Rates | Northern USA or Higher Flow Rates | Southern USA / Moderate Flow Rates | Tropical / Point-of-Use |
Tropical / Point-of-Use |
| Temp Control | Full micro-processor-based thermostatic temperature control featuring digital temperature selector / display and full power modulation based on flow rate and incoming water temperature. |
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| Digital Temp. Setting Display | No | |||||
| Hinged Case | Yes | |||||
| Power (KW's @ 240v) |
36 KW | 28.8 KW | 24 KW | 19.2 KW | 14.4 KW | 12 KW |
| Power (KW's @ 208v) |
27 KW | 21.6 KW | 18 KW | 14.4 KW | 10.8 KW | 9 KW |
| Max Temp Rise @ 1.5 GPM 240v (208v) |
92 F (92F) | 92 F (92F) | 92 F (82F) | 88 F (66F) | 65 F (49F) | 54 F (41F) |
| Max Temp Rise @ 2.25 GPM 240v (208v) |
92 F (82F) | 87 F (66F) | 73 F (54F) | 58 F (44F) | 43 F (37F) | 36 F (27F) |
| Max Temp Rise @ 3.0 GPM 240v (208v) |
82 F (61F) | 66 F (49F) | 54 F (41F) | 44 F (33F) | 33 F (25F) | 27 F (20F) |
| Max Temp Rise @ 4.0 GPM 240v (208v) |
55 F (41F) | 44 F (33F) | 37 F (27F) | 29 F (22F) | not recommended | |
| Max. Output Temperature | 140F (60C) | 140F (60C) | 140F (60C) | 125F (52C) | 125F (52C) | 125F (52C) |
| Heating Modules | 3 | 2 | 1 | |||
| Dimensions | 16.6 x 14.5 x 4.6" (42 x 36.8 x 11.7cm) | |||||
| Weight | 17.6 lbs (8.6kg) | 15.4 lbs (7.3kg) | 13.2 lbs (6.1kg) | |||
| Energy Efficiency | 99%+ energy efficient | |||||
| Activation Flow Rate | 0.77 GPM / 2.9 LPM | 0.50 GPM / 1.9 LPM | 0.37 GPM / 1.4 LPM | |||
| Pipe Fittings | 3/4" NPT | |||||
| Working Pressure | Max. Recommended Pressure = 150 psi (10 bar) - tested to 300 psi (20 bar). Maximum recommended input temperature 107F (42C). |
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| Voltage Requirements | 208 - 240 volts / single phase / 50 - 60 Hz | |||||
| Max. Amps (@ 240 volts) |
150 Amps | 120 Amps | 100 Amps | 80 Amps | 60 Amps | 50 Amps |
| Max. Amps (@ 208 volts) |
132 Amps | 105 Amps | 88 Amps | 70 Amps | 52 Amps | 44 Amps |
| Breakers Recommended* | 3 x 50 Amp | 3 x 40 Amp | 2 x 50 Amp | 2 x 40 Amp | 2 x 30 Amp | 1 x 50 Amp |
| Minimum amps to home | 300 Amps | 200 Amps | 150 Amps | 125 Amps | 100 Amps | |
| Recommended Wiring* (AWG Copper) |
3 x #6 | 3 x #8 | 2 x #6 | 2 x #8 | 2 x #10 | 1 x #6 |
| Safety | ETL Listed (USA and Canada) Independently tested to comply with both US and Canadian safety standards including ANSI/UL499 and CSA-E335-1/3E-94 |
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| Price Lowest Price Guaranteed! |
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| Stiebel Eltron Tempra 36 |
Stiebel Eltron Tempra 29 |
Stiebel Eltron Tempra 24 |
Stiebel Eltron Tempra 20 |
Stiebel Eltron Tempra 15 |
Stiebel Eltron Tempra 12 |
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* 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.