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Stiebel Eltron Tempra 15 Plus Electric Tankless Whole House Water Heater, 240 V, 14.4 kW

4.5 out of 5 stars 768 ratings

Price: $649.00
Tempra 15 Plus (Discontinued Model)

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  • Digital temperature control
  • Proven reliability;Seismic Proof Construction
  • No venting required
  • Sleek design fits anywhere
  • Save at least 15-20% on the hot water portion of your electric bill
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  • Stiebel Eltron Tempra 15 Plus Electric Tankless Whole House Water Heater, 240 V, 14.4 kW
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From the manufacturer

Tempra 12 | Tempra 12 Plus Tempra 15 | Tempra 15 Plus Tempra 20 | Tempra 20 Plus Tempra 24 | Tempra 24 Plus Tempra 29 | Tempra 29 Plus Tempra 36 | Tempra 36 Plus
Tempra 12 | Tempra 12 Plus Tempra 15 | Tempra 15 Plus Tempra 20 | Tempra 20 Plus Tempra 24 | Tempra 24 Plus Tempra 29 | Tempra 29 Plus Tempra 36 | Tempra 36 Plus
kW 12 kW 14.4 kW 19.2 kW 24 kW 28.8 kW 36 kW
Voltage 240 A 240 A 240 A 240 A 240 A 240 A
Max. amperage draw 50 A 60 A 80 A 100 A 120 A 150 A
Min. required breaker(s) 1 x 50 A DP 2 x 30 A DP 2 x 40 A DP 2 x 50 A DP 3 x 40 A DP 3 x 50 A DP
Min. required wire size and number of runs 1 x 6/2 AWG 2 x 10/2 AWG 2 x 8/2 AWG 2 x 6/2 AWG 3 x 8/2 AWG 3 x 6/2 AWG
Min. recommended household electric service 100 A 100 A 125 A 150 A 200 A 300 A
Min. flow to activate unit 0.37 GPM 0.50 GPM 0.50 GPM 0.50 GPM 0.77 GPM 0.77 GPM
Water connections 3/4" NPT 3/4" NPT 3/4" NPT 3/4" NPT 3/4" NPT 3/4" NPT
Output water temp. range 86°F - 140°F 86°F - 140°F 86°F - 140°F 86°F - 140°F 86°F - 140°F 86°F - 140°F
Warranty 7 yr leakage/3 yr parts 7 yr leakage/3 yr parts 7 yr leakage/3 yr parts 7 yr leakage/3 yr parts 7 yr leakage/3 yr parts 7 yr leakage/3 yr parts

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Stiebel Eltron Tempra 15 Plus Electric Tankless Whole House Water Heater, 240 V, 14.4 kW
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Customer Rating 4.5 out of 5 stars (768) 4.6 out of 5 stars (856) 4.4 out of 5 stars (3480) 4.4 out of 5 stars (2769) 4.5 out of 5 stars (676) 4.4 out of 5 stars (395)
Price $649.00 $649.00 $438.76 $191.31 $395.00 $599.00
Sold By ONLINE PLUMBING Amazon.com Amazon.com Amazon.com ALCRSOAN Amazon.com
Item Dimensions 19.5 x 21.5 x 8.5 inches 4.63 x 16.63 x 14.5 inches 3.63 x 17 x 17 inches 3.75 x 8 x 11.5 inches 18.25 x 3.5 x 14.5 inches 3.6 x 21 x 17 inches

Product description

Style:Tempra 15 Plus (Discontinued Model)

From the Manufacturer

The Tempra® Plus is the most technologically advanced tankless water heater available on the market today. Advanced Flow Control is exclusive to the Tempra® Plus and ensures a constant temperature output no matter how great the hot water demand is. Advanced Flow Control technology works by automatically adjusting the flow of water to eliminate unpleasant temperature fluctuation. What that means to you is a consistently satisfying experience every time, all the time !

Product information

Style:Tempra 15 Plus (Discontinued Model)

Technical Details

Additional Information

Warranty & Support

For warranty information about this product, please click here [PDF ] Spanish (Mexico) 771770 [PDF 8.49 MB]

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Important information

Wattage

15000 watts

Bulb Voltage

240 volts


Customer Questions & Answers

Customer reviews

4.5 out of 5 stars
4.5 out of 5
768 global ratings
How are ratings calculated?

Top reviews from the United States

Reviewed in the United States on October 16, 2017
Verified Purchase
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5.0 out of 5 stars Excellent Water Heater!
By c on October 16, 2017
I just installed the Stiebel Eltron Tempra 29 Plus hot water heater and tested it at 110F degrees. It was able to run 2 showers and 3 faucets full blast with water pretty hot. I also tested the same at 115F and it was as hot as I'd want to touch. There was no reduction in flow. This little guy is great!

Approximate Install Cost:
1. Unit: $700 - I bought this in Sept 2017.
2. Plumbing: $100 - I installed myself. Materials cost only. It took be about 5 hours.
3. Electrical: $300 - Electrician installed 3 x 40 Amp breakers (total draw of device is 120 Amps max) in my box (which had space). My total house service is 200 Amps. It took him about 3 hours. I know the electrician through a mutual connection, so he might have given me a deal.
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162 people found this helpful
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Reviewed in the United States on June 21, 2018
Style: Tempra 36 Plus (Discontinued Model)Verified Purchase
95 people found this helpful
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Reviewed in the United States on February 7, 2019
Style: Tempra 20 Plus (Discontinued Model)Verified Purchase
77 people found this helpful
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Reviewed in the United States on February 4, 2017
Style: Tempra 24 Plus (Discontinued Model)Verified Purchase
109 people found this helpful
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Reviewed in the United States on October 26, 2018
Style: Tempra 24 Plus (Discontinued Model)Verified Purchase
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5.0 out of 5 stars Best electric tankless water heater
By Scott Cold on October 26, 2018
I recently installed solar on my home. I wanted to replace my 15 yo gas 50 gallon tank water heater. The electric option seemed an economical choice. I chose the Stiebel Eltron Tempra Plus because of its capacity to modulate the power used and the flow of water to maintain a constant temperature. One thing to note: do not purchase or install a unit larger than 2/3 of your house service capacity. My home service amperage is 150. So the largest amperage unit that I can install is 100 amps. The 24 kw unit was the best choice for my home. Another thing to keep in mind, the 24 kw unit requires two independent 50 amp 2-pole breakers to connect service to it. For my home, I didn't have enough room to fit two 50 amp 2-pole breakers in my sub panel. Also for safety sake I wanted to have a 2 point disconnect to the Tempra Plus. I had a licensed electrician install a second 100 amp sub panel with the two 50 amp 2-pole breakers to provide service to the unit. I also had the city inspect the second sub panel and the water heater to record that it was installed to code. Its heating capacity fits my house perfectly. I have 3 showers and tubs in my home. If I run more than 2 at a time the hot water pressure drops significantly. However, we never run more than one at a time. A sink may be used at the same time as a shower. And there is no cold blast of water. The economy of this unit vs my old water heater: I spent an average of about $500 a year running my old water heater. My estimate of energy expense for this unit is $5 per year with solar. One more thing: if you want your tankless water heater to last more than a year or two then you'll need to flush it with vinegar about every 6 months. To be able to do this, you'll need to install service ports on intake and outlet ports. You can see examples of such service ports in my photos. I see photos of other installs, all without service ports. And then complaints that it suddenly stopped working after a year. Well tankless water heaters are not maintenance free. If you want to keep it working you have to descale it every 6 to 12 months depending on your water hardness. Or you have to have a water softener installed to get the calcium out of your water. Don't forget the service ports!
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57 people found this helpful
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Top reviews from other countries

K9guy75
4.0 out of 5 stars Still running strong after 3 years
Reviewed in Canada on December 8, 2015
Style: Tempra 24 Plus (Discontinued Model)Verified Purchase
22 people found this helpful
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Tanya
2.0 out of 5 stars Constant temperature fluctuations
Reviewed in Canada on December 12, 2017
Style: Tempra 24 Plus (Discontinued Model)Verified Purchase
7 people found this helpful
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A. Def
1.0 out of 5 stars Never run out of hot water again
Reviewed in Canada on August 30, 2018
Style: Tempra 24 Plus (Discontinued Model)Verified Purchase
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1.0 out of 5 stars Never run out of hot water again
Reviewed in Canada on August 30, 2018
Super fast shipping.

Unit was very easy to install with sharkbite fittings. This was actually one of the higher wattage units that needed only 2 (double pole) breakers in my panel, which was great since my panel is already pretty full. Most other models in this range (24KW) need 3 (double pole) breakers.

It works flawlessly. I am on a well, and the pressure is already not exceedingly high, which helps, I'm sure. I'm curious to see how well it performs in the winter time when the water coming in will be much colder. But so far, it works brilliantly and the temperature setting is in between what they call residential use and commercial use (at 116F). Worst case, I might have to raise the output temperature of the unit.

Also, mine is a smaller house with just one bath/shower (at the moment. there is another washroom being added in an upcoming renovation).

This is the (+PLUS) model, which has the pressure/temperature modulating option. The output temperature seems very stable.

Edit: this is the second time the unit burns out. Quick and easy replacement with Amazon, but a major pain in the ass. Not impressed with the durability. Now it gave out in the pandemic with about a year's usage. 7 people in the house and not one drop of hot water. 5 stars to one star
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5 people found this helpful
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Fernando Segovia
5.0 out of 5 stars Glad I purchased this heater for my country home
Reviewed in Canada on January 26, 2018
Style: Tempra 15 Plus (Discontinued Model)Verified Purchase
2 people found this helpful
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Drhombeat
5.0 out of 5 stars It does the job pretty well !
Reviewed in Canada on November 14, 2012
Style: Tempra 20 Plus (Discontinued Model)Verified Purchase
4 people found this helpful
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