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Stiebel Eltron Tempra 20 Trend Whole House Electric Tankless Water Heater - 239215

1 review
SKU 239215
Original price $769.00 - Original price $769.00
Original price
$769.00 - $769.00
Current price $769.00
in stock

The Tempra® 20 Trend is capable of providing consistently hot water to several fixtures at once while reducing energy usage. 240/208V - 19.2 kW copper tankless electric w. digital thermostat

Tempra® Trend models feature a memory preset that makes it easy to return to your ideal water temperature at the push of a button. With the Tempra® Trend, you’ll enjoy endless hot water, unrivaled efficiency, and the utmost in comfort. A Stiebel Eltron Tempra® responds directly to your demand for hot water without interruption. Showers will always be hot, even if there are several taken in a row and they run long.

Every Tempra® has self-modulation. Self-modulation ensures that only the least amount of energy is used at all times.


  • 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
  • Solid copper heating chambers
  • Smart microprocessor technology for steady temp. with variable flow
  • 7/3-year warranty

Delivery time / Order Processing & Shipping Times

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Tempra Model Item Number15 Trend 239214
15 Plus 239220
20 Trend 239215
20 Plus 239221
24 Trend 239216 
24 Plus 239222
29 Trend 239217
29 Plus 239223
36 Trend 239218 
36 Plus 239225
Phase - 50/60 HzSingle (6) 50/60 HzSingle (6) 50/60 HzSingle (6) 50/60 HzSingle (6) 50/60 HzSingle (6) 50/60 Hz
Voltage240 V or 208 V240 V or 208 V240 V or 208 V240 V or 208 V240 V or 208 V
Minimum Main Service Required  150 A200 A300 A
Wattage14.4 kW10.8 kW19.2 kW14.4 kW24 kW18 kW3 x 40 A3 x 35 A36 kW27 kW
Amperage2 x 30 A2 x 26 A2 x 40 A2 x 35 A2 x 50 A2 x 44 A3 x 40 A3 x 35 A3 x 50 A3 x 44 A
Number & min. recommended 
size of circuit breakers (1) (DP)
2 x 30 A2 x 40 A2 x 35 A2 x 50 A3 x 40 A3 x 35 A3 x 50 A
Number of runs & min. recommended
wire size (2) (copper)
2 x 10/2 AWG2 x 8/2 AWG2 x 8/2 AWG3 x 8/2 AWG3 x 8/2 AWG
Maximum Flow Rate at Ambient Water Temperature42°F1.6GPM2.1 GPM2.6 GPM3.1 GPM3.9 GPM
52°F1.9 GPM2.5 GPM3.1 GPM3.7 GPM4.6 GPM
62°F2.4 GPM3.1 GPM3.8 GPM4.6 GPM5.7 GPM
72°F3.1 GPM4 GPM5 GPM6 GPM7.5 GPM
Maximum temperature increase 
above ambient water temp
@ 1.50 GPM65 °F49 °F88 °F66 °F92 °F82 °F92 °F92 °F92 °F92 °F
@ 2.25 GPM43 °F37 °F58 °F44 °F73 °F54 °F87 °F66 °F92 °F82 °F
@ 3.00 GPM33 °F25 °F44 °F33 °F54 °F41 °F66 °F49 °F82 °F61 °F
@ 4.50 GPM--29 °F22 °F37 °F27 °F44 °F33 °F55 °F41 °F
Min. water flow to activate unit0.50 gpm (1.9 l/min)0.50 gpm (1.9 l/min)0.50 gpm (1.9 l/min)0.77 gpm (2.9 l/min)0.77 gpm (2.9 l/min)
Weight16.1 lb (7.3 kg)16.1 lb (7.3 kg)16.1 lb (7.3 kg)19.0 lb (8.6 kg)19.0 lb (8.6 kg)
Nominal water volume0.26 gal (1.0 l)0.26 gal (1.0 l)0.26 gal (1.0 l)0.39 gal (1.5 l)0.39 gal (1.5 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


1. Overcurrent protection sized at 100% of load. Tankless water heaters are considered a non-continuous load. 

2. Copper conductors with a temperature rating of 75 °C or greater must be used. Conductors should be sized to maintain a voltage drop of less than 3% under load. 

3. Requires minimum 150 A main service. 

4. Requires 200 A main service. 

5. Requires 300 A main service. 

6. 29 Trend/Plus & 36 Trend/Plus may be wired for balanced 3-phase 208 V. 15 Trend/Plus, 20 Trend/Plus, 24 Trend/Plus may be wired for unbalanced 3-phase 208 V

Specifications, Sizing and Installation Guides

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