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The Stiebel Eltron Tempra 29 electric tankless water heater is one of the most powerful electric tankless water heaters available in North America. This 28.8KW tankless heater is designed for whole house and commercial applications in cold climates where the incoming water temperature can drop below 40° F. It is also a popular choice for homes in warmer climates with high flow demands where multiple simultaneous hot water demands are required (up to 6 gallons per minute).
Maximum Flow Rate in Gallons Per
Minute at 105F Output Temperature |
| Incoming Water Temp: |
Flow Rate (GPM) |
| 40F |
3.0 GPM |
| 45F |
3.3 GPM |
| 50F |
3.6 GPM |
| 55F |
3.9 GPM |
| 60F |
4.4 GPM |
| 65F |
4.9 GPM |
| 70F |
5.6 GPM |
| 75F |
6.5 GPM |
* This chart is based on 240v power input. Please see
brochure for temp rise chart based on 208v input.
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Like all Tempra Series tankless water heaters, the Tempra 29 features a digital temperature display and convenient dial selector which allows you to set the desired output water temperature at any level between 86 and 125F (30 and 52C). Most importantly, it is one of the only tankless water heaters on the market that features a true thermostatic temperature control and full power-modulation based on both the incoming water temperature and the water flow rate. In layman's terms, the Tempra 29 will automatically sense the water flow rate and temperature, calculate how much power is needed to do the job, and will apply exactly that much power so it can precisely maintain the desired output temperature regardless of whether the flow rate changes or not. The result is the most precise temperature control of any tankless water heater on the market today!
Stiebel Eltron Tempra 29 Specifications |
| Thermostatically Controlled? |
Yes, digital temperature control and full power modulation based on flow rate and incoming water temperature. |
| KW |
28.8 KW @ 240v / 21.6 KW @ 208v |
| Voltage: |
208 - 240 volts / single phase / 50 - 60 Hz |
| Max. Amps: |
120 AMPS @ 240v / 105 AMPS @ 208v |
| Breakers Required:* |
3 x 50 AMP breakers (depends on local codes) |
| Wiring:* |
Minimum 3 x #8 AWG Copper (depends on local codes) |
| Dimensions: |
21.7 x 14.5 x 4.6" (55.2 x 36.7 x 11.6 cm) |
| Weight: |
24 lbs (11 KG) |
| Pipe Fittings: |
3/4" NPT |
| Energy Efficiency: |
99%+ |
| Activation Flow Rate: |
0.87 GPM / 3.3 LPM |
| Max. Water Pressure: |
150 psi |
| Warranty: |
Manufacturer's 3 Year Warranty |
| Safety: |
ETL Listed (US) - meets ANSI/UL 499 standards |
| Protection: |
microprocessor-based thermostatic temperature control (flow rate and temperature modulating) with thermal hi-limit cut-out switch monitoring each heating module |
Please note: A minimum 200 AMP household electrical service is highly recommended and will likely be required to install this model. If you are unsure of your electrical capacity in your home, please consult your electrician or contact us for assistance before ordering.
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| Buy in Canada |
We have been informed by the manufacturer, that safety certifications for Canada for the Stiebel Eltron Tempra Series are expected to be issued by May 16th. Accordingly, we are pleased to take pre-orders for all Tempra models. If you have any questions or would like to place a pre-order, please feel free to call us toll free at 1-866-376-2690.
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* Breaker size and wire gauge must meet all applicable local, state, provincial, and national electrical codes for your area - these are only guidelines that will apply to most installations. Some codes require use of electrical sub-panel for installation, especially when heater is not mounted within line-of-sight of the main electrical panel. Wiring should be sized to maintain a voltage drop of less than 3% under load. Please consult your electrician for more details.
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See an internal view of the Stiebel Eltron Tempra tankless water heater - learn how it works and what makes it superior to the competition.
(Click the picture)
Installation Information and Electrical Requirements
Stiebel Eltron tankless water heaters are independently tested to comply with the ANSI/UL499 safety standard
Stiebel Eltron is
Quality you can count on!
Manufactured in Germany
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