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Stiebel Eltron Tempra 12 Plus Whole House Electric Tankless Water Heater - 239219

SKU 239219
Original price $539.00 - Original price $539.00
Original price
$539.00 - $539.00
Current price $539.00
in stock

The Stiebel Eltron Tempra 12 Plus Whole House Electric Tankless Water Heater - 239219 is capable of providing consistently hot water to several fixtures at once while reducing energy usage. This 240/208V, 12 kW copper tankless electric water heater features a digital thermostat and a memory preset for returning to your ideal water temperature with the push of a button. Enjoy endless hot water, unrivaled efficiency, and utmost comfort, as the Tempra 12 Plus responds directly to your demand for hot water without interruption. It also has self-modulation to ensure minimal energy usage at all times.

Tempra Plus has self-modulation. Self-modulation ensures that only the least amount of energy is used at all times. The Advanced Flow Control function ensures a steady output temperature even if flow rates vary up or down, like when hot water is being used and an additional tap is opened or closed. 


  • Proven reliability from the world leader
  • Unlimited supply of hot water
  • Sleek design saves space
  • No venting required
  • Provides continuous hot water on demand
  • Saves energy-with auto-modulation
  • 7/3-year warranty
  • Tempra Plus features exclusive Advanced Flow Control, invented by Stiebel Eltron and awarded German patent DE 3805441 C2 and other patents.

Please refer to the sizing guide for help in choosing the ideal model for your requirements.

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Tempra Model Item Number239219
Phase - 50/60 HzSingle (6) 50/60 Hz
Voltage240 V or 208 V
Wattage12 kW9 kW
Amperage50 A44 A
Number & min. recommended 
size of circuit breakers (1) (DP)
1 x 50 A
Number of runs & min. recommended
wire size (2) (copper)
1 x 8/2 AWG
Maximum Flow Rate at Ambient Water Temperature42°F1.3 GPM
52°F1.6 GPM
62°F1.9 GPM
72°F2.5 GPM
Maximum temperature increase 
above ambient water temp
@ 1.50 GPM54 °F41 °F
@ 2.25 GPM36 °F27 °F
@ 3.00 GPM27 °F20 °F
@ 4.50 GPM--
Min. water flow to activate unit0.37 gpm (1.4 l/min) 
Weight13.5 lb (6.1 kg)
Nominal water volume0.13 gal (0.5 l)
Max. inlet water temperature131 °F (55 °C)
DimensionsWidth 165 /8˝ (42.0 cm) x Height 14½˝ (36.9 cm) x Depth 45 /8˝ (11.7 cm)
Minimum pressure30 psi (2 bar)
Working pressure150 psi (10 bar)
Tested to pressure300 psi (20 bar)
Water connections¾˝ NPT


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