• Stiebel Eltron Electric Tankless Water Heater - Tempra 12B

    Product ID • 222039000000

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The Stiebel Eltron Mini 4.2 - 240 Volt Electric Tankless Water Heater is designed for installation at the point-of-use. The Mini 4.2 heats water instantaneously as it flows through the unit. Stand-by heat-losses are completely eliminated. The efficient heating elements are controlled by a simple flow switch. Additionally, the Mini 4.2 water heater is equipped with a safety high-limit with manual reset.

The combination of meticulous German engineering and the best available materials ensure that every Mini 4.2 is of the highest quality and designed for many years of trouble-free service. Nobody can compare with our exceptional reliability record and customer support services!

Flow controls and faucet aerators are highly recommended in conjunction with tankless water heaters. The Mini 4.2 model ships with a 0.66 GPM pressure compensating flow reducer / aerator. All aerators are designed to fit most common faucets. No pressure relief valve, drains, or circulating pumps are needed.


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Technical Specs

Stiebel Eltron Mini 4.2 Techs and Specs

  • Voltage
    240 Volts
  • Kilowats
    3.5 KW
  • Max. Amp Load
    15.2 Amps
  • Min. Circuit Breaker size
    1 x 20 Amps
  • Min Required Wire Size AWG Copper
    1 x 12 gauge
  • Wiring
    comes with 24 inch pigtail
  • Min Water Flow to activate unit
    .40 gpm
  • Nominal Water Volume
    .026 gallons
  • Flow Rate 57 Degree Rise
    .42 GPM Flow Rate
  • Flow Rate 50 Degree Rise
    .48 GPM Flow Rate
  • Flow Rate 45 Degree Rise
    .5 GPM Flow Rate
  • Flow Rate 35 Degree Rise
    .69 GPM Flow Rate
  • Temperature Range
    80 to 140 Degrees F
  • Working Pressure MAX
    150 Psi
  • Water Connections
    3/8 inches NPT
  • Height
    6 1/2 inches
  • Width
    7 1/2 inches
  • Depth
    3 1/4 inches
  • Weight
    4 lbs

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