Stiebel Eltron Tempra & Tempra Plus Series Tankless Water Heaters
Models and Specifications
The Stiebel Eltron Tempra and Tempra Plus Series electric tankless water heaters are the most sophisticated thermostatically-controlled on demand, instantaneous water heaters available on the market today.
Stiebel Eltron 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.
The Tempra Plus series models take temperature control to another level, offering the industry's only Advanced Flow Control technology. This technology automatically adjusts the flow of water when the unit's sensor's detect that the flow demand is exceeding the heater's capacity. This feature is particularly useful in cold climates and other applications where the electrical service size does not permit the installation of a larger model where it may be desirable to handle occasional high flow demands. It is also desirable where high output temperatures are required for temperature-critical applications (commercial dishwashers, etc.) where flow rates are not always predictable.
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.
The following chart highlights the key differences between the current Tempra Series models....
| Tempra Plus Series | Tempra Series | |
|---|---|---|
| Full micro-processor-based thermostatic temperature control featuring full power modulation based on flow rate and incoming water temperature. | Yes | Yes |
| Dynamic Advanced Flow Control Technology - adjusts the flow of water when the unit's sensor's detect that the flow demand is exceeding the heater's capacity. | Yes | No |
| Digital Temperature Selector | Yes, all models | No |
| Hinged Case | Yes | Yes |
| Power Levels Available (KW @ 240V) | 36, 28.8, 24, 19.2, 14.4, 12 | 36, 28.8, 24, 19.2, 14.4, 12 |
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 Plus Series Specifications |
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|---|---|---|---|---|---|---|
| Tempra 36 Plus | Tempra 29 Plus | Tempra 24 Plus | Tempra 20 Plus | Tempra 15 Plus | Tempra 12 Plus | |
| 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. Dynamic Advanced Flow Control Technology - adjusts the flow of water when the unit's sensor's detect that the flow demand is exceeding the heater's capacity. |
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| Digital Temp. Setting Display | Yes | |||||
| 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 | The maximum output temperature is a function of incoming water temperature and water flow rate. For residential applications, all units are factory pre-set to permit a temperature setting from 86F (30C) to 140F (60C). The temperature setting can be easily adjusted using the adjustment dial on the front of the heater. | |||||
| Heating Modules | 3 | 2 | 1 | |||
| Dimensions | 16.6" x 14.5" x 4.6" (55.2 x 36.7 x 11.6cm) | |||||
| 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 Plus |
Stiebel Eltron Tempra 29 Plus |
Stiebel Eltron Tempra 24 Plus |
Stiebel Eltron Tempra 20 Plus |
Stiebel Eltron Tempra 15 Plus |
Stiebel Eltron Tempra 12 Plus |
|
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.