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Stiebel Eltron

Stiebel Eltron Tankless Heater – Tempra 12 Plus – Electric, On Demand Hot Water, Eco, White

  • Based on 2,096 reviews
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$424.95 Why this price?
4th of July Sale · 21% off was $539.00

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Availability: In Stock.
Fulfilled by Amazon
Arrives Saturday, Jul 12
Order within 12 hours and 3 minutes
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Size: 12 (kW)


Style: Tempra Plus


Features

  • CONTINUOUS FLOW Advanced Flow Control patented technology invented by Stiebel Eltron, automatically maintains water temperature for constant comfort. Itll reduce flow slightly if hot water demand exceeds capacity. Hot showers will never be interrupted again
  • SPACE & ENERGY SAVER Its small, sleek white design saves space yet still provides endless hot water for your whole house, and no venting is required. Eco friendly unit saves energy with auto-modulation and the ability to electronically control water flow. Savings monitor even shows how much you save on energy costs
  • EASY OPERATION Electronic switch activates the hot water heater and its noise free while in use. Has a digital temperature display and preset temperature and memory buttons, while the interior solid copper heating system does all the power work
  • TEMPRA 12 PLUS This specific model is 12kW, 240V, requires a min recommended electric service of 100 A, and offers an output water temperature of 68 to 140F. Check our guides below to compare features of our various Trend and Plus models, each available in different kW levels
  • WARRANTIES INCLUDED Stiebel Eltrons top-rated electric tankless water heaters perform with the highest standards for comfort and reliability. Our 7-Year Leakage and 3-Year Parts Warranties are included with purchase

Description

Get hot water for your entire home with this Stiebel Eltron Tempra 12 Plus Tankless Electric Water Heater. Made in Germany with a 100 years of engineering excellence, this energy-efficient heater delivers up to 34% savings on water heating costs with 99% efficiency. Featuring exclusive German-patented technology that automatically maintains desired temperatures even during high demand. Every family member enjoys the perfect shower without disruption. Self-modulating technology continually adjusts to ensure the minimum electricity is used. The sleek, compact design installs easily and requires no venting. Whether it's morning showers, laundry, or dishes, you'll always have hot water when you need it. Tempra 12 Plus provides hot water at a constant temperature for 1 shower in warm climates and for 1 low flow shower at a cabin or cottage in cold climates. Stiebel Eltron invented tankless electric water heating technology over 100 years ago and remains the industry pioneer with unmatched German engineering excellence.

Brand: Stiebel Eltron


Product Dimensions: 16.63"W x 14.5"H


Special Feature: LED Display


Color: White


Wattage: 12000 watts


Brand: ‎Stiebel Eltron


Product Dimensions: ‎16.63"W x 14.5"H


Special Feature: ‎LED Display


Color: ‎White


Wattage: ‎12000 watts


Voltage: ‎240 Volts


Maximum Flow Rate: ‎3 Gallons Per Minute


Maximum Temperature: ‎1.4E+2 Degrees Fahrenheit


Heat Output: ‎1.2E+4 Watts


Efficiency: ‎High


Style: ‎Tempra Plus


Maximum Operating Pressure: ‎150 Pound per Square Inch


Mounting Type: ‎Wall


Is Electric: ‎Yes


Manufacturer: ‎Stiebel Eltron


Item Depth: ‎4.625 inches


UPC: ‎040232668586


Manufacture Year: ‎2023


Global Trade Identification Number: ‎86


Part Number: ‎239219


Item Weight: ‎19 pounds


Country of Origin: ‎Germany


Item model number: ‎12 Plus


Is Discontinued By Manufacturer: ‎No


Size: ‎12 (kW)


Pattern: ‎Water Heater


Installation Method: ‎Mounting


Item Package Quantity: ‎1


Number of Handles: ‎1


Certification: ‎CSA, NSF, UL, ANSI


Special Features: ‎LED Display


Batteries Included?: ‎No


Batteries Required?: ‎No


Date First Available: August 30, 2018


Frequently asked questions

If you place your order now, the estimated arrival date for this product is: Saturday, Jul 12

Yes, absolutely! You may return this product for a full refund within 30 days of receiving it.

To initiate a return, please visit our Returns Center.

View our full returns policy here.

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Similar Products

Top Amazon Reviews

    • Top quality tankless water heater at a great price!
Size: 36 (kW) Style: Tempra Plus
I'd been looking to get a tankless water heater for a few years, but the unit prices plus installation were just too high until now. This Stiebel Eltron whole home electric tankless water heater was out of my budget until I found this open box unit price reduced by 48% of retail. This 2025 SE unit has a top of the line digital display panel that makes increasing temperature and gpm water pressure and flow adjustments easy and instant. You'll wonder why you waited so long. If you're a DIY person there are also multiple you tube videos about how to install and what's needed. The most important thing to know is that this unit requires 3-50amp dedicated breakers, so check your electrical panel before you buy any tankless heater as the amps needed vary based on the heater size and gpm's needed. I highly recommend this high quality Stiebel Eltron Tempra 36pro whole home tankless water heater as it produces 100°+ hot water within 1-2 minutes vs my old 75 gallon tank that caused me to wait 5-7 minutes and wasted several gallons of water before it reached the hot temperature I needed to bathe or shower. I can't wait to compare the savings, and I recommend this SE Tempra 36pro tankless water heater. The electrical wiring and installation requires an electrician or an experienced person to install this top of the line high-end, best in quality and performance unit. Thank you Stiebel Eltron for selling top quality equipment at a great price and free Prime shipping. You made this a 100% positive Amazon experience! ... show more
Reviewed in the United States on June 10, 2025 by CommonSense101
    • High quality water heater
Size: 24 (kW) Style: Tempra Plus
Review Image by Leonard Solie Leonard Solie
I’m very impressed with this unit. I got the 24KW for a 3/3 2 story house in Florida. The unit was installed in the garage. I also ran a whole house water filter to keep it clean. We had to run new electrical as this unit requires 2 50 amp breakers and 8 gauge wire. It only takes 16 seconds for HOT water to reach the upstairs bathroom. It’s easy to use. German quality! ... show more
Reviewed in the United States on June 10, 2025 by Leonard Solie Leonard Solie
    • Awesome system! Easy install!
Size: 15 (kW) Style: Tempra Plus
Review Image by Michael A. Corrigan Michael A. Corrigan
Review Image by Michael A. Corrigan Michael A. Corrigan
No muss… no fuss. I used it to replace an electric 40 gallon water tank that was 16 years old for my 700 ft cottage. Ran two new 10/2 AWG wire lines from the CB panel (two double 30amp circuits needed for 15 model) and rerouted the Plex B pipe. Install was easy for the water heater itself. Just make sure to get the descale plumbing kit and watch you tube on install. Saved 2k doing it myself. Cost total install was around 1100 bucks. Now i can get that drone I always wanted… ... show more
Reviewed in the United States on May 29, 2025 by Michael A. Corrigan Michael A. Corrigan
    • The Hot Water NEVER Runs Out!
Size: 12 (kW) Style: Tempra Plus
Review Image by Jon C. Jon C.
Review Image by Jon C. Jon C.
I first purchased a Stiebel Eltron Tempra 12 about 25 years ago. I had a large jacuzzi tub that I could never get filled with hot water with the original tank heater where, when the hot water runs out of the tank, it takes quite some time to heat up a new batch. The Tempra 12 solved that issue, but there are a few things to be aware of before purchasing a tankless water heater. The greatest benefit is that you truly have an endless supply of hot water, so it's no problem being the last person in a large household to take a shower - you'll still get hot water and can stay in there as long as you want. There's typically also a savings in energy costs associated with the tankless water heaters since, unlike the tank heaters that are constantly running to keep the stored water in the tank hot, the tankless water heaters only kick on when there's a demand for hot water and heats the water in "real time". While I haven't personally noticed a savings on my electric bill (electricity prices have only gone up!), it's likely been there and just difficult to notice without a true side-by-side comparison. That said, this newer "Plus" version of the Tempra 12 is auto-modulating which means, unlike the older versions that always kick on with full power any time hot water is demanded, the auto modulating will scale down the power if you just want warm water so there should be additional power savings with the Plus model. The cons and things to be aware of associated with this unit include: 1) Although people refer to these units as supplying "instant hot water", it does take a few seconds for the water to heat up, travel to the faucet, and start pouring out hot. This is to be expected with any tankless hot water heater. 2) While I am a big fan of the tankless water heaters, and this specific model, this is actually my 3rd Tempra 12 model in about 25 years. I purchased the last one in February of 2018. So, they don't seem to last too long but I have done literally zero maintenance to any of the units to date. 3) This needs to be wired to a 50 amp circuit in your circuit box. You will likely need both a plumber and an electrician to install. First, an electrician to run the power to the location you plan to install, then a plumber to install the water heater. This can increase the costs significantly, however, once it's installed at that location, a plumber or even a good handyman can easily re-install a new unit in the same location. The reason I've stayed with the Tempra 12 is that replacing it has been simple, in spite of the relatively short life. 4) Make sure you understand your household's needs for hot water. The Tempra 12 works great if you want to run a shower while doing a load of dishes or laundry simultaneously. But, if you want to have three showers going along with the dishes and laundry, this unit will likely not be able to heat enough water fast enough to supply all of the outlets. I hope this helps! ... show more
Reviewed in the United States on October 4, 2024 by Jon C. Jon C.
    • Lots of hot water and no loss of floor space
Size: 36 (kW) Style: Tempra Plus
Review Image by Dan Dobb Dan Dobb
So far so good. Easy install other than running 3 new 50A circuits. Recovered the garage floor space and now have endless hot water. Happy with it so far.
Reviewed in the United States on June 29, 2025 by Dan Dobb Dan Dobb
    • Hot water on demand!
Size: 24 (kW) Style: Tempra Plus
Why did you pick this product vs others?: I hardly ever write reviews but I am so happy with this purchase. I switched from a gas water tank to this electric heater and it is fantastic. Water is hot on demand with no issues. Well worth the price!!
Reviewed in the United States on June 18, 2025 by Stacey

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