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Stiebel Eltron

Model Tempra 12

Internet #203210867

Tempra 12 Self-Modulating 12 kW 1.82 GPM Electric Tankless Water Heater

$439.00 /each
  • Same-day installation in most areas. Call 1-855-400-2552 by noon.

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Product Overview

Powerful output, compact design, remarkable energy-saving features: Our whole house electric tankless water heaters are made to perform to the highest standards in terms of comfort and reliability. Intelligent self-modulating technology continually ensures the least amount of energy is used to heat the water. The Tempra 12 provides hot water at a constant temperature for 1 bathroom in warm climates and for 1 bathroom at a cabin or cottage in cold climates. See sizing guide to determine which model is best for you (guide assumes 2 GPM or less per shower-head). Stiebel Eltron invented tankless electric water heating technology more than 90 years ago, and is still the industry pioneer and world leader. Our engineering and manufacturing tradition of excellence means you can depend on the performance and reliability of our products. Call Stiebel Eltron at 800-582-8423 if you have high flow showers or any sizing questions.

  • Warranty: 7 years against leakage and 3 years parts (see warranty manual for details)
  • 99% efficient- saves 15-20% (up to 30%) on electric bills compared to an electric tank-type water heater
  • Endless hot water
  • Thermostatic control range from 86-140°F
  • Self-modulating control saves energy by adjusting electrical usage based on
  • Saves space - no venting required
  • Requires 240 or 208-Volt
  • Recommended minimum of 100 total amp service, with 1 separate, dedicated 50 Amp circuit
  • Professional installation recommended
  • Overheat safety protection and thermal protection reset are standard
  • See warranty for complete details of the 3-year residential and commercial warranty against defects in workmanship and materials under normal use
  • Stiebel Tempra Sizing Guide:

    Stiebel Tempra Sizing Guide

  • Click here for more information on Electronic Recycling Programs

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Customer Questions & Answers

4 Questions6 Answers

Customer Questions & Answers

Tempra 12 Self-Modulating 12 kW 1.82 GPM Electric Tankless Water Heater
Tempra 12 Self-Modulating 12 kW 1.82 GPM Electric Tankless Water Heater

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3 answers

water softener added

This question is from Tempra 12 Self-Modulating 12 kW 1.82 GPM Electric Tankless Water Heater
Asked by
Tucson, AZ
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August 23, 2015
Can you add a water softener to a tankless water heater system? Do you use one with salt or without?
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Answers (3)

Asked by
Mukwonago, WI
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December 8, 2015
Answer: 
I have a softener and iron curtain. No problem!
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Asked by
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September 9, 2015
Answer: 
Yes, you can use a water softener with a tankless water heater. The newer type water treatment devices get plumbed right into the cold water inlet piping before the tankless unit. These are usually less costly than traditional salt based softeners and you're not putting the salts into the environment.
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August 24, 2015
Answer: 
Yes, if a water softener is need a non-reverse osmosis type is recommended.
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2 answers

I see a review that filling a tub does not work well?

This question is from Tempra 12 Self-Modulating 12 kW 1.82 GPM Electric Tankless Water Heater
Asked by
Luther,OK
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July 9, 2015
I am considering using this for a small, 504 sq ft cabin in which I will have a shower, sink, and an ALMOST full size tub. As well as kitchen sink. That is it.Oklahoma weather and well water, and the kitchen and bathroom very close together and close to where this device will be installed. Anyone know if I should still have problem running a full, hot bath? Suggestions for better winter use?
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Asked by
Mukwonago, WI
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December 8, 2015
Answer: 
You will have to slow the flow to maintain the temperature depending on the temp of the water coming into the unit. A tub faucet runs around 3-5 gallons per minute but the heater may only put out 1 and a half per minute at 110 degrees. I is suggested that you get 2 of these units to keep up to the volume of a tub. What is really cool is that there a red indicator light in the unit that tells you if the Read More
You will have to slow the flow to maintain the temperature depending on the temp of the water coming into the unit. A tub faucet runs around 3-5 gallons per minute but the heater may only put out 1 and a half per minute at 110 degrees. I is suggested that you get 2 of these units to keep up to the volume of a tub. What is really cool is that there a red indicator light in the unit that tells you if the unit is keeping up. If it is blinking it is not keeping up. I turned on the shower and kitchen sink at the same time. Then I turned the hot shutoff down on the sink until the light in the unit stopped blinking. I am restricted slightly at the kitchen faucet but at least if someone is washing dishes while someone is in the shower there won't be any screams. I have a small cabin also. I don't think you have much of a winter down by you but you will notice the difference of output if the well water is colder. Our well water temp is around 50 degrees maybe 55 in the summer. Read Less
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Asked by
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September 9, 2015
Answer: 
Based on a low incoming water temp of 50 degrees and an output temp of 110 degrees for a good hot tub bath or shower, you would need therefore a 60 degree rise in temp which is what determines the gpm each unit handle. The Tempra 12 Plus would do only 1.35 gpm with a 60 degree rise - not enough for your fixtures. You would be best served with the Tempra 24 Plus which would do 2.75 gpm with a 60 degree Read More
Based on a low incoming water temp of 50 degrees and an output temp of 110 degrees for a good hot tub bath or shower, you would need therefore a 60 degree rise in temp which is what determines the gpm each unit handle. The Tempra 12 Plus would do only 1.35 gpm with a 60 degree rise - not enough for your fixtures. You would be best served with the Tempra 24 Plus which would do 2.75 gpm with a 60 degree rise to manage the tub. You would also need a 200 amp service to support the 24 Plus. Read Less
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1 answer

specification error

This question is from Tempra 12 Self-Modulating 12 kW 1.82 GPM Electric Tankless Water Heater
Asked by
Hamilton Ontario
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March 6, 2016
Specifications provide lower flow for 35 F rise than for 45 F rise - this is clearly wrong.
What are the correct flow rates?

Flow Rate @ 35 F Rise (gallons/min) 1.82
Flow Rate @ 45 F Rise (gallons/min) 2.34
Flow Rate @ 55 F Rise (gallons/min) 1.49
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Asked by
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March 7, 2016
Answer: 
Here are the flow rates based on the Temp Rises cited above for the Tempra 12 or Tempra 12 Plus:
35 F Rise 2.3 gpm
45 F Rise 1.8 gpm
55 F Rise 1.5 gpm
Assumption: you are connecting at 240 V
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i have a 4800sqft home wat size tankless water heater

This question is from Tempra 12 Self-Modulating 12 kW 1.82 GPM Electric Tankless Water Heater
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San Antonio Texas
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May 11, 2016
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Customer Reviews

Rated 4.8 out of 5 by 14 reviewers.
Rated 5.0 out of 5.0 by Great Product This product was great. Easy to install, takes up very little room and provides hot water as long as you need it. August 9, 2016
Rated 5.0 out of 5.0 by Tankless Hot Water Heater Works great! Highly recommend especially with limited space. July 26, 2016
Rated 5.0 out of 5.0 by Great for limited space Was not very hard to install. The flow of hot water seems to be enough for showering. We have a 1200 sq ft 2nd home with 1 shower and more than likely not run washer and dishwasher at same time. Not sure on the light bill yet. We also put a filter system in because it was recomended with well water. Works great for our needs. February 11, 2013
Rated 5.0 out of 5.0 by I was surprised I was actually shocked how good it works. Sure beats a 50 gallon tank sitting in my laundry room December 8, 2015
Rated 5.0 out of 5.0 by Worth The Cost Researched tankless unit for awhile, but when my water heater finally went out, I had to decide and I decided on the Tempra 12. Cost more than I planned to install it but I think it was worth it. Even the electrician was amazed by the unit. September 27, 2015
Rated 5.0 out of 5.0 by nice simple, well build, works good, easy to install... September 15, 2015
Rated 5.0 out of 5.0 by Easy to install. Provides ample hotwater and does not use electircity all the time to keep your water hot in a tank. This was my first tankless hotwater heater and found it easy to install. I have it set at 126 degrees so I can cut it back with cold water. I have a long run (53 ft) from one end of the house to the other so I purchase a second hotwater to eliminate the long wait for the hot water to reach the kitchen and guest bath. The thing to keep in mind is that it will put out 2.3 gal per min. If you are demanding more, the flow is cut back because it only has the set amount of 2.3 gal per min. If you are on a well, I would recommend some type of filter in your water line before it reaches your heater. May 21, 2013
Rated 5.0 out of 5.0 by I should have done this with my other one. I don't get why it's alleged these tankless water heaters are hard to install. November 4, 2014
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