Stiebel Eltron Tempra Plus Series Electric Tankless Water Heaters

featuring the industry's most precise temperature control system - leading technology at an affordable price

Stiebel Eltron Tempra Plus


The Stiebel Eltron Tempra Plus Series features true microprocessor-controlled temperature regulation as well as a convenient digital temperature display and dial selector which allows you to set the desired output water temperature at any level between 86 and 140F (30 and 60C). 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. Tempra Plus models 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.

Need help choosing a tankless water heater for your application.  Try our model selector.

Tempra Plus models also feature Stiebel Eltron's exclusive dynamic Advanced Flow Control technology. This technology automatically adjusts the flow of water when the unit's sensors 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 and 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.) and where flow rates are not always predictable.

Simply stated, the Stiebel Eltron Tempra Plus Series electric tankless water heaters feature the most precise temperature control of any tankless water heater on the market today!

The Tempra Plus Series is available in various power levels for a wide range of whole house and commercial water heating applications.

Stiebel Eltron Tempra Plus Series Whole House Electric Tankless Water Heaters
Model Power Level Application Price
Tempra 36 Plus 36 KW Extreme North and/or Very High Flow Rates
US$778.96
free shipping
Tempra 29 Plus 28.8 KW Northern Regions or High Flow Rates
US$701.44
free shipping
Tempra 24 Plus 24 KW Northern Regions or High Flow Rates
US$698.00
free shipping
Tempra 20 Plus 19.2 KW Southern USA / Moderate Flow Rates
US$645.00
free shipping
Tempra 15 Plus 14.4 KW Tropical / Point of Use
US$649.00
free shipping
Tempra 12 Plus 12 KW Tropical / Point of Use
US$538.27
free shipping
Stiebel Eltron Tempra Plus Series Whole House Electric Tankless Water Heaters
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 Regions or Higher Flow Rates Southern USA / Moderate Flow Rates Tropical / Point of Use
Temperature Control Technology 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
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)
92F (92F) 92F (92F) 92F (82F) 88F (66F) 65F (49F) 54F (41F)
Max Temp Rise @
2.25 GPM 240v (208v)
92F (82F) 87F (66F) 73F (54F) 58F (44F) 43F (37F) 36F (27F)
Max Temp Rise @
3 GPM 240v (208v)
82F (61F) 66F (49F) 54F (41F) 44F (33F) 33F (25F) 27F (20F)
Max Temp Rise @
4 GPM 240v (208v)
55F (41F) 44F (33F) 37F (27F) 29F (22F) Not Recommended
Max. Output Temperature 140F (60C)
Max. Input Temperature 131F (55C)
Heating Modules 3 heating modules 2 heating modules 1 heating module
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).
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 Amps 3 x 40 Amps 2 x 50 Amp 2 x 40 Amp 2 x 30 Amp 1 x 50 Amp
Minimum Amps to Home 300 Amps 200 Amps 125 Amps 100 Amps
Recommended Wiring*
(AWG Copper)
3 x #6/2 3 x #8/2 2 x #6/2 2 x #8/2 2 x #10/2 1 x #6/2
Safety ETL Listed (US & Canada)
Independently tested to conform all applicable safety standards including
ANSI/UL 499 (USA) and CSA-E335-1/3E-94 (Canada)
Price

Lowest Price Guaranteed!
US$787.35
free shipping
US$701.44
free shipping
US$698.00
free shipping
US$645.00
free shipping
US$649.00
free shipping
US$538.27
free shipping
Stiebel Eltron Tempra 36 Plus electric tankless water heater
Tempra 36 Plus
Tempra 29 Plus
Tempra 29 Plus
Tempra 24 Plus
Tempra 24 Plus
Tempra 20 Plus
Tempra 20 Plus
Tempra 15 Plus
Tempra 15 Plus
Tempra 12 Plus
Tempra 12 Plus

ETL Listed - USA & Canada!
All Stiebel Eltron Tempra and Tempra Plus tankless water heaters are ETL Listed in the USA and Canada, ensuring they conform to all applicable safety standards.
WQA Certified - USA & Canada!
All Stiebel Eltron Tankless Water Heaters are tested and certified by WQA against NSF/ANSI 372 for "lead free" compliance.
Warranty
Comprehensive 7 year manufacturer's warranty against leakage / 3 year against defects in workmanship & materials. See warranty for details


Stiebel Eltron is:
Stiebel Eltron is ISO-9001 Certified


Important Pre-Purchase Information

Prior to purchasing your Stiebel Eltron Tankless Water Heater, it is important that you ensure that your home has sufficient electrical capacity for the desired model, or that you have budgeted for any upgrades that might be necessary. Please note that all electrical tankless water heaters, regardless of the manufacturer's claim, are restricted in reality to approximately 3 gallons per minute of flow at any given time in cold winter climates. This is generally more than enough for residential applications, however, certain simultaneous water usages in the home at single or multiple outlets may exceed this capacity. Please bear this in mind when selecting a model or system for your home. See the chart on our Tankless Water Heater Model Selector page for maximum flow capabilities based on your climate and model selected.

Electrical Requirements for Stiebel Eltron Tempra Series Tankless Water Heaters:

Before purchasing a Stiebel Entron, or any other electric tankless water heater, please ensure that your home has sufficient electrical capacity for your desired model, or that you have taken note of any upgrades that may be required.

Model Recommended
Breaker
Maximum Amperage
@ 240 V
Maximum Amperage
@ 208 V
Recommended Household
Electrical Service
Recommended Minimum
Wire Gauge
Tempra 36 / 36 Plus 3 x 50 AMPS * 150 AMPS 132 AMPS 300 AMPS 3 x #6 AWG*
Tempra 29 / 29 Plus 3 x 40 AMPS * 120 AMPS 105 AMPS 200 AMPS 3 x #8 AWG*
Tempra 24 / 24 Plus 2 x 50 AMPS * 100 AMPS 88 AMPS 200 AMPS 2 x #6 AWG*
Tempra 20 / 20 Plus 2 x 40 AMPS * 80 AMPS 70 AMPS 125 AMPS 2 x #8 AWG*
Tempra 15 / 15 Plus 2 x 30 AMPS * 60 AMPS 52 AMPS 100 AMPS 2 x #10 AWG*
Tempra 12 / 12 Plus 1 x 50 AMPS * 50 AMPS 44 AMPS 100 AMPS 1 x #6 AWG*

* 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.

The above specifications are only guidelines. If your home is already equipped with a large number of electrical appliances, you may require a larger electrical service than the one recommended above. Please consult an electrician before placing an order.

If your home does not have the minimum household electrical service as specified for your desired model, you can still purchase a Stiebel Eltron tankless water heater, however, upgrades to your electrical service will likely be required. It is recommended that you consult your certified electrician for a quote prior to purchasing.

Please be aware that uninstalled units returned due to a home that has inadequate electrical service may subject to a re-stocking fee. Please see our POLICIES page for more details.