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Stiebel Eltron

Model Tempra 20 Plus

Internet #203210872

Tempra 20 Plus Advanced Flow Control and Self-Modulating 20 kW 2.91 GPM Electric Tankless Water Heater

$699.00 /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 perform with the highest standards for comfort and reliability. Tempra Plus models feature Advanced Flow Control, exclusive to Stiebel Eltron tankless heaters. If hot water demand exceeds unit’s working capacity, Advanced Flow Control automatically maintains consistent temperatures by slightly reducing flow. Intelligent self-modulating technology continually ensures the least amount of energy is used to heat the water. The Tempra 20 Plus provides hot water at a consistent temperature for 1-2 bathrooms in warm climates, or 1 bathroom in cool 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.

  • All Tempra Plus models feature advanced flow control that provides consistent hot water temperatures even when demand exceeds capacity
  • Warranty: 7 years against leakage & 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
  • Saves space - no venting required
  • Requires 240 or 208-Volt
  • Recommended minimum of 150 total amp service, with 2 separate, dedicated 40 Amp circuits
  • Easy to read digital display
  • Professional installation recommended
  • 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

Info & Guides

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Customer Questions & Answers

Tempra 20 Plus Advanced Flow Control and Self-Modulating 20 kW 2.91 GPM Electric Tankless Water Heater
Tempra 20 Plus Advanced Flow Control and Self-Modulating 20 kW 2.91 GPM Electric Tankless Water Heater

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What is the difference between the tempra 20 plus and the tempra 20?

This question is from Tempra 20 Plus Advanced Flow Control and Self-Modulating 20 kW 2.91 GPM Electric Tankless Water Heater
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February 24, 2016
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Asked by
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Home Improvement Profile: Professional
April 7, 2016
Answer: 
Plus models have an automatic control that will maintain hot water temperature by reducing the flow rate if too many taps are turned on. A good example is if someone is in the shower, and someone else turns on the kitchen sink and overloads the water heater. The person in the shower doesn't get a shot of cold water. The water temp from both the showerhead and the kitchen sink are at the set temperature Read More
Plus models have an automatic control that will maintain hot water temperature by reducing the flow rate if too many taps are turned on. A good example is if someone is in the shower, and someone else turns on the kitchen sink and overloads the water heater. The person in the shower doesn't get a shot of cold water. The water temp from both the showerhead and the kitchen sink are at the set temperature of the water heater, but the flow rate is automatically adjusted so less water comes out. Once the kitchen sink is turned off the showerhead goes back to normal and the water temperature never changes. The basic models don't have this feature. Read Less
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March 3, 2016
Answer: 
Besides the cosmetic difference that the Tempra 20 Plus has a digital readout of the temp setting (as opposed to a knob & scale on the Tempra 20), the Tempra 20 Plus has and an automatic flow control at the inlet in order to adjust the flow and maintain the output temperature as need be. With the basic Tempra 20 a light on the front of the unit would start to blink should the flow rate exceed what the Read More
Besides the cosmetic difference that the Tempra 20 Plus has a digital readout of the temp setting (as opposed to a knob & scale on the Tempra 20), the Tempra 20 Plus has and an automatic flow control at the inlet in order to adjust the flow and maintain the output temperature as need be. With the basic Tempra 20 a light on the front of the unit would start to blink should the flow rate exceed what the unit could handle given the temp setting. It would then require the operator to manually adjust the flow or temp until the light goes solid and the expected temp comes up. Read Less
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2 answers

3/4" HW outlet - 1/2" water line

This question is from Tempra 20 Plus Advanced Flow Control and Self-Modulating 20 kW 2.91 GPM Electric Tankless Water Heater
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Alaska
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August 17, 2015
Tempra 20 Plus model is needed due to cold ground water. Tempra 20 Plus has a 3/4" outflow nipple...can I convert to 1/2" after the suggested 36" copper line? My cold weather cabin will have 1/2" PEX water lines to bathroom & kitchen. How will this effect water pressure?
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Home Improvement Profile: Professional
April 7, 2016
Answer: 
Yes you can reduce the line diameter. You shouldn't have any problem with water pressure. Using a braided stainless connector instead of copper pipe will probably allow easier servicing for flushing scale or cleaning the inlet filter.
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September 9, 2015
Answer: 
Should not be a problem to convert to a 1/2" line after the Tempra 20 Plus. You should have however a normal line pressure in the 40 - 60 psi range.
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Customer Reviews

Rated 3.3 out of 5 by 3 reviewers.
Rated 5.0 out of 5.0 by Great Electric Tankless HWH The Steibel Eltron was one of the few brands that seemed to know what they were doing when I originally wanted to purchase a Tankless Water Heater. I bought this to replace an existing 40 Gal. HWH that was not properly winterized and was destroyed when the foreclosed property I purchased had been abandoned about 8 months before I bought it. I installed the unit in a 100 Amp box on 2-50 Amp breakers, so in theory, it could potentially use all of the power in my home, but I have never had any issues with power when people are taking a shower and the microwave is being used, or any other major power draws are happening. I can't really speak to issues of flow, but there have been as many people as 4 living in my home at one time, and I think the bigger issue tends to be when other people draw cold water and the mix gets changed in the shower. I have also installed a low-flow (pressure adjustable) Kohler Shower Head, and Aerators at the main faucets, which help limit flow, but getting enough hot water has never been a problem. I actually tended to have issues with not drawing enough water flow through to kick it on, which might be my only grief with the unit. If I just want a small amount of hot water to rinse dishes or the like I sometimes need to fiddle around with it or kick it on higher to get the HWH to kick on. Anyway, my unit was installed in June of 2008 and I've had no issues with it since. I'd highly recommend. February 16, 2015
Rated 4.0 out of 5.0 by Very reliable Unit..... I see that someone had a problem with there Tempra 20 Plus, I installed one of these in a new house ( River Place) I had low flow at first and found out that it has a built in stainer on the inlet. Something from the new well had stopped it up. Causing low flow right off the bat. Cleaned it out and going strong for 6 years Now. May 5, 2014
Rated 1.0 out of 5.0 by Expensive Mistake After installing I have been very disappointed in the water heaters performance. The temp has to be turned up to achieve a good level of water. Even then the water pressure is very low. It is fed by a 3/4 inch line with 65lbs of water pressure. I get barely enough flow to take a shower. Heavens forbid someone else turns on the water to wash their hands. Very expensive mistake. Will never order an electric again. November 29, 2013
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