Bosch Pro Under-Sink Electric Tankless Tronic US7-2R


Status: In Stock




The Bosch Tronic 3000 is an ultra-compact and lightweight under-sink tankless water heater. It is designed to provide an endless supply of hot water to one or more sinks. The Tronic 3000 has a 98% efficiency with no stand-by loss and it is encased in a beautiful white durable plastic housing. This unit has the ability to be installed in a 360-degree orientation, which allows you to position the unit in tight under-counter applications which makes for an easy and flexible installation.

The Benefits of Tankless

The Tronic 3000 takes up far less space than a traditional water heater and can be wall-mounted right under the sink, taking up practically zero space. Because they run on electricity and don’t hold water, there is no venting and virtually no maintenance. With significant energy and space savings, this tankless water heater is a great choice for your point-of-use applications.



  • 98% efficient with no stand-by loss
  • Ultra-compact and lightweight
  • Copper heat exchanger with copper-sheathed
  • heating elements for longer life
  • 360-degree installation
  • No temperature/pressure relief valve
  • is necessary (subject to local codes)
  • 5 year limited warranty§
  • As low as 0.3 GPM activation flow rate


Light commercial applications where it is more practical to have a point of use water heater, such as shopping malls, airports, stadiums, and offices.



Technical Specifications US9-2R US7-2R US4-2R US3-2R
Part Number 7736505871 7736505870 7736505868 7736505867
Uniform Energy Factor 0.97 0.98 0.97; 0.95
Activation Flow 0.7 GPM 0.7 GPM 0.4 GPM 0.3 GPM
Electrical Requirements
Voltage Requirements 240 240 240 120
Watts (kW) 9.5 7.2 4.5 3.6
Max Amps 40 30 25 30
Minimum Wire Size 8 AWG 8 AWG 10 AWG 10 AWG
Phase Single Single Single Single
Maximum Flow Rate Depending on Temperature Rise
GPM Output at Temperature Rise of 45oF 1.4 1.1 0.7 0.5
GPM Output at Temperature Rise of 55oF 1.2 0.9 0.6 0.4
GPM Output at Temperature Rise of 65oF 1.0 0.8 0.5 0.4




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