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Stiebel Eltron Tempra 24 Plus Whole House Electric Tankless Water Heater - 239222

SKU 239222
Original price $938.00 - Original price $938.00
Original price
$938.00 - $938.00
Current price $938.00
in stock

The Stiebel Eltron Tempra 24 Plus Whole House Electric Tankless Water Heater - 239222 features a unique Advanced Flow Control function, ensuring you’ll never be surprised by a cold shower. It also features two different temperature memory presets, making it easy to adjust for personalized needs. Thanks to these and other innovations, the Tempra Plus ensures you’ll enjoy endless hot water and unrivaled efficiency. (240/208V, 24 kW copper tankless electric w. Advanced Flow Control)

Tempra Plus has self-modulation. Self-modulation ensures that only the least amount of energy is always used. The Advanced Flow Control function ensures a steady output temperature even if flow rates vary up or down, like when hot water is 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 Number239222
Phase - 50/60 HzSingle (6) 50/60 Hz
Voltage240 V or 208 V
Wattage24 kW18 kW
Amperage2 x 50 A2 x 44 A
Number & min. recommended 
size of circuit breakers (1) (DP)
2 x 50 A
Number of runs & min. recommended
wire size (2) (copper)
2 x 8/2 AWG
Maximum Flow Rate at Ambient Water Temperature42°F2.6 GPM
52°F3.1 GPM
62°F3.8 GPM
72°F5 GPM
Maximum temperature increase 
above ambient water temp
@ 1.50 GPM92 °F82 °F
@ 2.25 GPM73 °F54 °F
@ 3.00 GPM54 °F41 °F
@ 4.50 GPM37 °F27 °F
Min. water flow to activate unit0.50 gpm (1.9 l/min)
Weight16.1 lb (7.3 kg)
Nominal water volume0.26 gal (1.0 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

Specifications, Sizing and Installation Guides

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