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Stiebel Eltron

Model Tempra 24 Plus

Internet #203210874

Store SKU #1001107298

Tempra 24 Plus Advanced Flow Control and Self-Modulating 24 kW 3.64 GPM Electric Tankless Water Heater

  • Uses only the amount of energy necessary to heat the water needed
  • Overheat safety and thermal protection resets are standard
  • 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 24 Plus provides hot water at a consistent temperature for up to 2 bathrooms in warm climates, or 1-2 bathroom in cool climates. See sizing below 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 125 total amp service, with 2 separate, dedicated 40 Amp circuits
  • Easy to read digital display
  • Professional installation recommended
  • 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

19 Questions32 Answers

Customer Questions & Answers

Tempra 24 Plus Advanced Flow Control and Self-Modulating 24 kW 3.64 GPM Electric Tankless Water Heater
Tempra 24 Plus Advanced Flow Control and Self-Modulating 24 kW 3.64 GPM Electric Tankless Water Heater

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6 answers

DOES THIS UNIT REQUIRE A 220 LINE TO OPERATE?

This question is from Tempra 24 Plus Advanced Flow Control and Self-Modulating 24 kW 3.64 GPM Electric Tankless Water Heater
Asked by
LAKELAND, FL
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June 29, 2015
MY HOUSE CURRENTLY HAS A 150AMP SERVICE!
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Answers (6)

Asked by
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November 4, 2015
Answer: 
Generally, if you have a 150 service then the largest Tempra unit you could install would be the Tempra 20 Plus which can draw up to 80 amps of current. It would require 2 separate 220-240 volt circuits that would be wired separately back to you electric panel.
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Asked by
MA
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Home Improvement Profile: Professional
September 2, 2015
Answer: 
Tempra 24 Plus requires not one but 2 x 220-240 V circuits, each drawing a max of 50 amps for the 100 amp total. General rule is not to go much over half of the entire service. So, if you have a 150 amp service then the largest unit would be the Tempra 20 Plus, 2 circuits x 40 amps each for total of 80 amps max draw.
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Asked by
Arizona
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September 1, 2015
Answer: 
Im not a Electrician with that said I run mine Tempra 24 on 2 40Amp breakers, and its more than enough. but if I was running a 4 bath with showers and a washing machine ... like it can handle you will need a bigger breaker is all. but it will do it. It gets hot so use a vented area and I recommend a scale and hard water deposit and filter system with this product, its a little touchy.
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Im not a Electrician with that said I run mine Tempra 24 on 2 40Amp breakers, and its more than enough. but if I was running a 4 bath with showers and a washing machine ... like it can handle you will need a bigger breaker is all. but it will do it. It gets hot so use a vented area and I recommend a scale and hard water deposit and filter system with this product, its a little touchy.
this product Stiebel Eltron Has Excellent Factory service and backup of warranty Read Less
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Asked by
Arizona
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September 1, 2015
Answer: 
2 110 sets to make 220 a total of 6 single wires
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July 16, 2015
Answer: 
In the detail section under specifications, it states that the unit only needs 100 amps, so you will be good.
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July 1, 2015
Answer: 
This electric water heater requires 208 or 240 volt electric service.
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3 answers

wiring

This question is from Tempra 24 Plus Advanced Flow Control and Self-Modulating 24 kW 3.64 GPM Electric Tankless Water Heater
Asked by
california
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August 7, 2015
im planning to install the tempra 24 plus
I already have the 6 gauge 3 wires and I have a doble pole 60 amp breaker in a 200 amp panel
but the instuctions is confuse say need two separate 60 amp breakers and the picture show a two doble pole breaker and 5 wires any one already buy and install this particular model? thanks
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Asked by
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November 4, 2015
Answer: 
The Tempra 24 Plus requires 2 separate 240 V circuits, connected via 2 separate double pole 60 amp breakers and 2 separate runs of 6 AWG copper wire. You only need a ground wire (6 AWG too) on first circuit. Also, you don't need any neutral wires as each is a separate 240 V circuit.
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Asked by
MA
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Home Improvement Profile: Professional
September 2, 2015
Answer: 
For the Tempra 24 Plus you need two separate runs of 6 AWG copper wire, i.e. 6/2. Each is a 240V circuit and therefore no neutrals required. 5th wire is the ground wire on the 1rst circuit. Breakers would be 2 double poles 60 amp 240 V.
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Asked by
Arizona
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September 1, 2015
Answer: 
Requires new breakers at about 50amp (2) 2 sets of 110amp wires live , neutral , ground shielding for new wires, and a clean and pinched off entry to the BOX.
! should be professionally installed ! by a Electrician
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3 answers

Is Tempra 24 Plus more than is needed

This question is from Tempra 24 Plus Advanced Flow Control and Self-Modulating 24 kW 3.64 GPM Electric Tankless Water Heater
Asked by
Fort Worth, Texas
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July 30, 2015
I have upstairs bathroom only that I'm going to get elec tankless water heater for. I want quality but I wonder if the Tempra 24 Plus is more water heater than needed for this purpose.
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Asked by
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November 4, 2015
Answer: 
Probably not more than is needed. It depends on where you are located and how cold your incoming water is in the winter. Also, the Tempra 24 Plus can draw up to 100 amps. Your electric supply must be a min 200 amp service and you should have an electrician do a review of other connected electrical devices.
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Asked by
MA
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Home Improvement Profile: Professional
September 2, 2015
Answer: 
Depends on what state you are in and the incoming water temp in the winter and the flow rate on your shower head. Check the temp rise vs. gpm flow charts and assume 110 degree output temp. In a warmer climate the Tempra 24 Plus might be a little overkill. However, the main requirement for this unit is that you have a minimum 200 amp service to support the 100 amp max possible draw.
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Asked by
Arizona
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September 1, 2015
Answer: 
I own a Tempra 24 for several years now and say it is a bit too much for the small jobs. Go with a single heater point of use water heater by same company . I found this unit likes to run hard , not creep along...
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2 answers

can this unit be installed in a manufactured home?

This question is from Tempra 24 Plus Advanced Flow Control and Self-Modulating 24 kW 3.64 GPM Electric Tankless Water Heater
Asked by
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March 12, 2016
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July 1, 2016
Answer: 
Outside of any local code considerations there is no reason you can't install this in a manufactured home. In addition to endless hot water you will also gain back a lot of space your tank water heater occupies now.
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March 13, 2016
Answer: 
You have to check you local building codes to see if the Tempra Whole House Tankless Electric Water Heater can be installed in a manufactured home in your area.
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Customer Reviews

Rated 4.8 out of 5 by 38 reviewers.
Rated 5.0 out of 5.0 by Best hot water heater I own I purchased this for my cabin . The heater output surprised me with how consistent the temp is. I just needed to run a hot water line to the shower. If the sink is run at the same time or water used while in the shower it still put out the same temp. With the small size it takes up you gain lot of storage space. In my case a hole closet. The unit is built in a sturdy metal box, It makes no noise at all. May 26, 2016
Rated 5.0 out of 5.0 by Water Heater Our home was built2 years ago and we used 2 Rheem tank less water heaters. They never kept up the demand especially in the winter. We bought the stiebel and it's perfect for our home. No lapse in heat and easy installation. The stiebel is worth double its cost and we would recommend it to anybody. May 18, 2016
Rated 5.0 out of 5.0 by Best Purchase Ever The hardest part with Installation is running the new power wires. But unless you are an electrician you should probably hire one to run the wires anyway. I just bought this new one for my mother. I have had this in my house for 2 years and it has paid for itself in that time with saved electricity money. If you have well water, install an inline filter before the water inlet to keep your heater working great. April 26, 2016
Rated 5.0 out of 5.0 by Good whole house unit This larger unit took the place of a point of use unit I mistakenly had put in, based on many positive reviews of people using it for the entire house. The smaller unit didn't deliver the hot water I was used to getting with two hot water tanks. I had it replaced and this unit professionally installed. The electrician and the contractor were impressed with this unit, and so was I when I got the hot water I have come to expect. The contractor was impressed that the unit is German-made, rated for a 2 bathroom home in a cooler climate, and designed for residential, commercial, and industrial applications. What's not to like about that? I'm very pleased with my purchase, which should handle any hot water needs I have for years to come. October 29, 2014
Rated 5.0 out of 5.0 by Tempra 24 Plus Our old tank water heater was 10 years old. I will enjoy the savings on our electric bill and the endless hot water. Great 90 year old company. March 1, 2016
Rated 3.0 out of 5.0 by TEMPRA tankless Electric Water Heater Purchased this to replace a standard hot water heater. Had to have electrical service upgraded to 200amps. Even still, it still dims the lights when it is in use with other major appliances such as clothes dryer. The water temp is very good and we are never without hot water. Looking forward to seeing a cost savings. February 10, 2016
Rated 5.0 out of 5.0 by Excellent product! I was worried that this unit would be underpowered, but it's not. I wanted the larger Tempra 29 model, but I only have 200 AMP service coming into my home, so I had to "settle" on the Tempra 24. I put "settle" in quotes, because I really didn't have to settle at all. The Tempra 24 performs great, heats up quickly and runs flawlessly. It's more than enough water flow for a single person to take a hot shower with great water pressure and flow and for someone else to be using hot water to wash their hands, etc., in another bathroom. It will support two people taking hot showers at the same time, but the water flow to both showers is decreased by about 40% ... but still usable for a shower. All in all, I highly recommend this product! I'm very happy with it. Best of all, with two daughters in the house who have decided they love to take "hour showers", there is finally hot water left for me! May 6, 2014
Rated 5.0 out of 5.0 by Very pleased Although this product seems a little pricey, it exceeds the performance of our last whole house tankless heater. We have not had it long enough to comment on cost effectiveness, but we have used a whole house tankless heater for 13 yrs. with considerable savings. Delivery was prompt. Installation was not difficult considering we did it ourselves. A very quiet unit that provides hot water to several areas simultaneously without heavy fluctuation. Overall, love this product. December 18, 2012
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