Stiebel Eltron Tempra tankless water heater models & specifications

By: The Tankless Water Heater  09-12-2011
Keywords: Water Heaters, 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 occassional 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.

The following chart highlights the key differences between the current Tempra Series models..

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
36, 28.8, 24, 19.2, 14.4, 12 24, 19.2, 14.4, 12

Stiebel Eltron tankless water heaters are designed to completely replace a conventional hot water tank.


Stiebel Eltron Tempra Plus Series Specifications

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.
Digital Temp. Setting Display Yes
Hinged Case Yes
36 KW 28.8 KW 24 KW 19.2 KW 14.4 KW 12 KW
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 0.87 GPM / 3.3 LPM 0.58 GPM / 2.2 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).
Voltage Requirements 208 - 240 volts / single phase / 50 - 60 Hz
150 Amps 120 Amps 100 Amps 80 Amps 60 Amps 50 Amps
132 Amps 105 Amps 88 Amps 70 Amps 52 Amps 44 Amps
Breakers Recommended* 3 x 60 Amp 3 x 50 Amp 2 x 60 Amp 2 x 50 Amp 2 x 40 Amp 1 x 60 Amp
Minimum amps to home 300 Amps 200 Amps 125 Amps 100 Amps
Recommended Wiring*
(AWG Copper)
3 x #6 3 x #8 2 x #6 2 x #8 2 x #8 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
Price USA
Price Canada


Stiebel Eltron Tempra Series Specifications

Application 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.
Digital Temp. Setting Display No
Hinged Case Yes
24 KW 19.2 KW 14.4 KW 12 KW
18 KW 14.4 KW 10.8 KW 9 KW
92 F (82F) 88 F (66F) 65 F (49F) 54 F (41F)
73 F (54F) 58 F (44F) 43 F (37F) 36 F (27F)
54 F (41F) 44 F (33F) 33 F (25F) 27 F (20F)
37 F (27F) 29 F (22F) not recommended
Max. Output Temperature 140F (60C) 125F (52C) 125F (52C) 125F (52C)
Heating Modules 2 1
Dimensions 16.6 x 14.5 x 4.6" (42 x 36.8 x 11.7cm) 16.6 x 14.5 x 4.6" (42 x 36.8 x 11.7cm)
Weight 15.4 lbs (7.3kg) 13.2 lbs (6.1kg)
Energy Efficiency 99%+ energy efficient
Activation Flow Rate 0.58 GPM / 2.2 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).
Voltage Requirements 208 - 240 volts / single phase / 50 - 60 Hz
100 Amps 80 Amps 60 Amps 50 Amps
88 Amps 70 Amps 52 Amps 44 Amps
Breakers Recommended* 2 x 60 Amp 2 x 50 Amp 2 x 40 Amp 1 x 60 Amp
Minimum amps to home 200 Amps 125 Amps 100 Amps
Recommended Wiring*
(AWG Copper)
2 x #6 2 x #8 2 x #8 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
Price USA
Price Canada

* 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.

Keywords: Tankless Water Heaters, Water Heaters

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