Think someone you know may be interested in this product? Enter the fields below, and we'll send them information about it.
Your Name:
Friend's Name:
Friend's Email:
Message: (Optional)

Stiebel Eltron Tempra 20B Electric Tankless Water Heater, 208/240 Volts


Stiebel Eltron Tempra 20B Electric Tankless Water Heater, 208/240 Volts

$599.00 & Eligible for Free Shipping
List Price: $784.00
You Save: $185.00 (24%)
Not available
Not Currently Available
Ships internationally
Stiebel Eltron Tempra 20B Electric Tankless Water Heater, 208/240 Volts

Unlimited supply of hot water: The Tempra™ continually heats water instantaneously as you require it - and only when you require it. The Tempra™ unit completely replaces a conventional tank heater with no disruption to your comfort and hot water needs.

Save energy and reduce your electric bill: Electric tank type water heaters are subject to stand-by losses which amount to 15 - 20% of the kWH used. In addition, water in a tank has to be heated hotter than necessary to account for these stand-by losses. Changing to a tankless system like the Tempra™ eliminates these problems and results in typical savings of at least 15 - 20% on the heating portion of your electric bill.

Sleek design saves space: The Tempra™ takes up considerably less space than conventional tank type water heaters and saves valuable living space.

Control temperature simply by setting a dial: Set the knob on the front cover and enjoy water temperatures between 86°F (30°C) and 125°F (52°C). Change the desired temperature at anytime. Advanced microprocessor technology ensures that the water temperature never deviates from the set point.

Better than gas: The Tempra™ has several advantages over a gas-type tankless water heater. Compared to many similar gas tankless models the Tempra™ is less expensive to purchase. Installation is also much simpler and cheaper since it is not necessary to vent a Tempra™ to the outside. The venting that a gas unit requires causes anywhere from a 10 - 20% efficiency reduction from heat escaping out the exhaust pipe. Furthermore, for every cubic foot of gas burned, two cubic feet of air have to be mixed in to create ideal combustion. In a cold climate, this hurts efficiency further. When a gas unit fires, it draws in air around it, heats the water, and then expels warm exhaust outside. Since no house is airtight, this suction action causes a drafting condition where cold air from the outside seeps back in through door cracks and other parts of the house that may not be airtight. By nature of the design, the Tempra™ is nearly 100% efficient; converting 100% of the electrical energy it consumes into heat. All that heat is then transferred to the water - none is lost to the outdoors.

Proven reliability: Stiebel Eltron has an enviable track record of engineering excellence and product quality. The three years parts warranty is unique in the industry. You can depend on the Tempra™ for many years to come.

Take the cover off: We have done our homework. As an international leader in the tankless electric water heating industry, Stiebel Eltron is proud to have pioneered this technology. The company's German engineering and manufacturing tradition of excellence means that you can depend on its performance for many years to come.

Seismic proof construction: The Tempra™ is a tankless water heater system, and is thereby not subject to seismic code. There is no need for preventative construction, as required when using a tank type water heater.

Superior, reliable performance: The Tempra™ has several temperature and flow sensors which feed their readings into the unit's proprietary microprocessor control. Heating elements are engaged in stages, achieving the temperature you desire. The Tempra™ continually monitors the water temperature it produces.

* Click More Images for Technical Data and Sizing Information.
Tempra 20B

Manual Brochure
5/5 Stars
4 reviews
Sort Display Write a Review
5/5 StarsTempra 20B | I purchased a Tempra 20B for a guest suite of two bedrooms and a full bath located remotely from our lake home. The folks at Stiebel-Eltron were very helpful in providing sizing information. The purchase and delivery was easy and efficient. I am very pleased.
Recommended? Yes.
5/5 StarsSo glad I bought another tankless | I paid an electrician $700 7 years ago to provide for number 4 wires required for the install of an electric S.E.T.S. system. It never worked right and I ended up buying another 50 gal. water heater within 3 days-- cold showers are horrible. The old unit was on a switch so we planned when hot water was going to be used and turned it it on.

Based on rave reviews and remembering I was all set to go with the wiring roughed in, I got a Steible Eltron #20 and could not be happier. It takes the same amount of time to get the hot water to the faucet as the old system and I am saving buckets of $$$

The installation was easy for an electrician whom I hired because I did not have the strength to bend # 4 wires the unit requires.

The theromostat is "touchy", but once set, stays at the assigned temp.

We are still joking, "Please turn on the hot water for my bath"
Recommended? Yes.
5/5 StarsNice replacement to Bosch | Been through THREE Bosch AE 115 tankless heaters in 3 years. It is a terrible product so I gave up on them finally and spent a few more dollars for this Tempra 20. It was a very easy replacement because it uses the same wiring and is even a little higher powered. It has been great from installation. By the way, we are a running a family of 6 on this heater and doing just fine.
Recommended? Yes.
5/5 StarsWorks as advertised | We use the heater for one outdoor shower, sink and washing machine. We live in south east U.S. so incoming water temp is fairly high. Consequently, we set the outflow temp at 110, which gives us ample hot water at 2.5 gpm. Installation was straightforward with excellent manual. After one month's use, we are extremely satisfied. We will see about longevity. If I were building a conventional house, I'd install a Steibel 15 for each bathroom, rather than try to use a 24 for the whole house. We've noticed that running either a hot or cold faucet or flushing the toilet while someone is taking a shower reduces outflow rate and thus effects the temperature, either by increasing demand on hot water or by reducing flow rate of all water, but these issues exist with conventional water heaters.

So far, we've experienced no unexpected downsides. Our unit performs as we expected: continual hot water. We also expect that as we get into winter the inflow temp will drop, we will raise the temp on the heater, we may have to reduce the flow rate, etc., so that our outdoor shower will become uncomfortable, but all this is expected given the specs of the heater. Again, we've had no unexpected downsides.
Recommended? Yes.
Sort Display Submit a Question
Q:what is the difference between the Tempra20 and the Tempra20Bjerry | Tuesday, March 26, 2013
Know the answer? Sign in to answer this question.
There are many differences for this item which are listed on the product page in the description for both items. The 20B has more features to offer than the 20 plus. For more specific information I can suggest contacting Stiebel Eltron directly at (800) 582-8423
Aaron | Tuesday, March 26, 2013
Was this answer helpful? Sign in to rate this answer
Q:I presently have a tank water heater and want to make sure that this will supply my entire home needs. I have a dishwasher, washing machine, 2 showers, 1 tub, 5 sinks where hot demand will be needed. I would also like to know what accessories I need for my new tankless unit or any drawings for installation as I may get all extra parts I need.Corey Sutherlin | Saturday, September 15, 2012
Know the answer? Sign in to answer this question.
This product is designed to give you a temperature increase of around 40-50 degrees at 2.5 GPM, if running other things at the same time that will cut back the temperature increase. Depending on what your incoming water temperature is that may be enough, however for most whole house applications like you presented, a Tempra 36 is probably a better option.
Josh | Monday, September 17, 2012
Was this answer helpful? Sign in to rate this answer
Learning Center

The Learning Center is a one stop destination for everything from buying guides and expert advice to videos and DIY Guides.

Customers Also Bought

$549.00   $744.00
Stiebel Eltron Tempra 15B Electric Tankless Water Heater, 208/240 Volts
Not available
Eligible for Free Shipping
$439.00   $564.00
Stiebel Eltron Tempra 12B Electric Tankless Water Heater, 208/240 Volts
Not available
Eligible for Free Shipping
$649.00   $824.00
Stiebel Eltron Tempra 24B Electric Tankless Water Heater, 208/240 Volts
Not available
Eligible for Free Shipping
$159.00   $189.00
Stiebel Eltron Mini 3 Tankless Electric Water Heater, 110-120 Volts
Not available
Eligible for Free Shipping