|Item Weight||1 pounds|
|Product Dimensions||4.63 x 16.63 x 14.5 inches|
|Item model number||239222|
|Is Discontinued By Manufacturer||No|
|Style||Tempra 24 Plus (24 kW)|
|Item Package Quantity||1|
|Number of Handles||1|
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Stiebel Eltron Tankless Water Heater – Tempra 24 Plus – Electric, On Demand Hot Water, Eco, White, 20.2
- Make sure this fits by entering your model number.
- TEMPRA 24 PLUS – This specific model is 24kW, 240V/208V, requires a min. recommended household electric service of 150 A, and offers an output water temperature of 68˚ to 140˚F. Check our guides below to compare features of our various Trend and Plus models, each available in different kW levels
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From the manufacturer
|Tempra 12 Trend | Tempra 12 Plus||Tempra 15 Trend | Tempra 15 Plus||Tempra 20 Trend | Tempra 20 Plus||Tempra 24 Trend | Tempra 24 Plus||Tempra 29 Trend | Tempra 29 Plus||Tempra 36 Trend | Tempra 36 Plus|
|kW||12 kW||14.4 kW||19.2 kW||24 kW||28.8 kW||36 kW|
|Voltage||208 V||208 V||208 V||208 V||208 V||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|
1 Find your approximate ground water temperature on the map.
2 Check the column on the table to see how many fixtures can be supplied at the same time for each model.
3 Use the actual max. flow rate to fine-tune these recommendations.
4 Make sure you have sufficient electrical service for the model.
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|Sold By||Amazon.com||Amazon.com||ALCRSOAN||YaMe Office Supplies *Free Shipping||Amazon.com||ALCRSOAN|
|Item Dimensions||4.63 x 16.63 x 14.50 inches||3.63 x 14.00 x 17.00 inches||18.25 x 3.50 x 14.50 inches||13.75 x 13.50 x 13.75 inches||3.75 x 8.00 x 11.50 inches||12.63 x 8.25 x 3.63 inches|
The Stiebel Eltron Tempra 24 Plus Tankless Water Heater features exclusive Advanced Flow Control™ German patented technology invented by Stiebel Eltron to automatically maintain water temperature for constant comfort. It’ll reduce flow slightly if hot water demand exceeds capacity to ensure that hot showers will never be interrupted. Tempra 24 Plus will typically use 15-20% less energy compared to conventional electric tank water heaters. Although, it’s possible to save significantly more energy depending on personal home usage habits. The difference is that conventional tank water heaters continually store hot water, and as a result, lose 15%-20% of the total energy consumed to the environment around them. This is called standby heat loss. Tank water heaters that use gas or oil are even less efficient, because they also lose heat through their vents to the outdoors. Our tankless water heaters do not need venting, and will not store hot water, waiting for you to use it. They operate on-demand to provide continuous and endless hot water when you need it, and not waste energy when you don’t. CERTIFICATIONS INCLUDE - ANSI/UL Std. 499, CSA Std. C22.2 No. 88, ISO 9001, WQA tested & certified against NSF/ANSI 372 for lead free compliance. TECHNICAL SPECIFICATIONS – Single Phase 50/60 Hz; Voltage: 240 V/208 V; Wattage: 24 KW/18 KW; Min. recommended household electric service 150 A; Amperage draw: 2 x 50 A 2 x 44 A; Number and min. recommended size of circuit breakers: 2 x 50 A (DP); Number of runs and min. recommended wire size (copper): 2 x 6/2 AWG; Max. temperature rises: 92 F/82 F at 1.50 GPM, 73 F/54 F at 2.25 GPM, 54 F/41 F at 3.00 GPM, 37 F/27 F at 4.50 GPM; Min. water flow to activate unit: 0.50 GPM/1.9l/min; Weight: 16.1 lb/7.3 kg; Nominal water volume: 0.26 gal/1l; Max. inlet water temperature: 131 F/55 C; Working pressure: 150 PSI/10 BAR; Tested to pressure: 300 PSI / 20 BAR; Water connections: 3/4" NPT.
Top reviews from the United States
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I called Stiebel Eltron to find out what unit I should purchase given the amount of fixtures and flow rate of each in my house (1 shower head - 1.9 GPM, 3 sink faucets ranging from 1.2 to 1.5 GPM). I also explained that a future addition of a master bed/bath is potentially coming down the pipeline and that I would like to have the water heater be able to handle that load as well. The customer service rep I spoke to pointed to the Tempra/Plus Sizing Guide that shows my average tap water temperature (52* F) and that the Tempra 29 Plus will handle up to 3.7 GPM max flow rate. Or "you will be able to run two showers and a sink faucet all at the same time and not affect the temperature or flow rate." Which is fine for my needs. So I bought it.
After running all the electrical needed to the unit (not a cheap endeavor) the unit was hooked up.
Pros: I love the easy to use interface, the unit itself is tiny and extremely quiet when in use. Silent in fact.
Cons: The Tempra 29 Plus is not a 3.7 gpm unit based on 52* F tap water. What is buried in their literature, that the customer service rep did not point out, is a graph that shows Flow Rate vs Temperature Rise. If I set the unit to 120* (normal temperature setting) that equates to a 68* F temperature rise. A 68* temperature rise, according to their graph, shows that the Tempra 29 will only handle approx 2.6 GPM flow rate. Which means I can only run one shower without affecting temperature or flow rate. Once a faucet is turned on, or any other fixture, the flow rate severely drops because the actual max flow rate is exceeded.
So why the discrepancy between the sizing guide and the Temperature Rise vs Flow Rate graph? Makes no sense.
It also makes no sense that this unit is literally only a one fixture unit being sold as a three fixture unit.
Another thing to note is the temperature of the water, even if it's just one shower running, would fluctuate. The water temperature was not consistent throughout a shower period.
I called and spoke to tech support several times throughout a two day period. They did not have any solutions for me.
So I am currently in the process of returning the unit to Amazon. I will update this review to include how that went.
1. Buy the two valves shown. Your plumber will have them but they will be cheaper if you buy them from Amazon. Also get the 3M decalcification unit. Can't hurt.
2. At first the controller wouldn't work and that was because the circuit board on the unit door was not seated quite right. Just giving it some gentle pressure had it snap into place.