Stiebel Eltron Tempra 24 (24B) Tankless Water Heater
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Stiebel Eltron Tempra Series Brochure
(Adobe PDF)
Electrical Requirements & Installation Information
Stiebel Eltron Tempra 24 (24B) |
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- 24 kW's of Power
- Thermostatically Controlled
- Requires 200 Amp Service
The Tempra 24 (24B) is also frequently used in warmer southern climates for applications requiring higher flow rates of up to 5 gallons per minute (large Roman-style or jacuzzi tubs, simultaneous showers, etc.), as well as for commercial applications.
Like all Tempra Series tankless water heaters, the Tempra 24 (24B) features true microprocessor-controlled temperature regulation and a dial selector which allows you to set the desired output water temperature at any level between 86 and 140F (30 and 60C). 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.
The Tempra 24 will automatically adjust its power output to accommodate changes in the incoming water temperature and flow rate so it can precisely maintain the desired output temperature. The result is the most precise temperature control of any tankless water heater on the market today!
Electric tankless water heaters are a lasting trend in the water heating industry that is here to stay.
The trend towards increased energy efficiency is here to stay with the Tempra 24. Join the Tempra trend today.
| Incoming Water Temp: | Flow Rate (GPM) |
| 40°F | 2.5 GPM |
| 45°F | 2.7 GPM |
| 50°F | 3.0 GPM |
| 55°F | 3.3 GPM |
| 60°F | 3.6 GPM |
| 65°F | 4.1 GPM |
| 70°F | 4.7 GPM |
| 75°F | 5.4 GPM |
Please review the Stiebel Eltron Tempra Brochure
for temp rise data at 208v input.
| Do You Have Hard Water? |
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If your water hardness trends above 7 grains per gallon (GPG) or 120 mg/l (ppm), you should consider hard water treatment prior to your tankless water heater. If your hardness exceeds 12 GPG or 200 mg/l (ppm), hard water treatment is strongly recommended. Hard water treatment helps maintain performance and efficiency, ensures optimal water flow and pressure, and protects your heater from pre-mature failure due to mineral build-up inside the heating module and other components. 
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| Stiebel Eltron Tempra 24 Specifications | |
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| Thermostatically Controlled? | Yes, temperature control with full power modulation based on flow rate and incoming water temperature. |
| KW | 24 KW @ 240v / 18 KW @ 208v |
| Voltage: | 208 - 240 volts / single phase / 50 - 60 Hz |
| Max. Amps: | 100 AMPS @ 240v / 88 AMPS @ 208v |
| Breakers Required:* | 2 x 50 AMP breakers (depends on local codes) |
| Wiring:* | Minimum 2 x #6 AWG Copper (depends on local codes) |
| Dimensions: | 16.6 x 14.5 x 4.6" (42.0 x 36.8 x 11.7 cm) |
| Weight: | 15.4 lbs (7.3 KG) |
| Pipe Fittings: | 3/4" NPT |
| Energy Efficiency: | 99%+ |
| Activation Flow Rate: | 0.50 GPM / 1.9 LPM |
| Max. Water Pressure: | 150 psi (tested to 300 psi) |
| Warranty: | 7 years against leakage / 3 years against defects in workmanship & materials |
| Safety: | ETL Listed (US & Canada) - meets all applicable standards, including ANSI/UL 499 (USA) and CSA-E335-1/3E-94 (Canada) |
| Protection: | microprocessor-based thermostatic temperature control (flow rate and temperature modulating) with thermal hi-limit cut-out switch monitoring each heating module |
| GTIN: | 0094922100665 |
* 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.
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.
Stiebel Eltron Tempra 24 (24B) Reviews
Tankless water heater 
Good product, had previously purchased from Tankless in Florida, which worked well for 8 years. Installation not to difficult, following the instructions. I chose product for good price and European experience with good workmanship. hope this one will last long.
- Roger
All Stiebel Eltron Tempra and Tempra Plus tankless water heaters are ETL Listed in the USA and Canada, ensuring they conform to all applicable safety standards. |
All Stiebel Eltron Tankless Water Heaters are tested and certified by WQA against NSF/ANSI 372 for "lead free" compliance. |
Comprehensive 7 year manufacturer's warranty against leakage / 3 year against defects in workmanship & materials. See warranty for details |
Stiebel Eltron is: 
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