Bosch Tronic 3000T 4 Electric Mini-Tank Water Heater

The Bosch Tronic 3000T ES4 is a 4-gallon point-of-use electric mini-tank water heater designed to deliver hot water directly at a single fixture, eliminating the wait caused by long supply runs from a distant primary water heater. It can serve as the sole water heating source for a single sink, as a supplement to an existing primary heater, or as an inline buffer to address the cold water sandwich effect experienced with tankless water heater systems.

The ES4 plugs into a standard 120-volt household outlet and draws 12 amps at 1440 watts. No dedicated circuit wiring or special electrical work is required beyond ensuring the outlet is on a circuit capable of supporting the unit's draw without overloading. A standard 15-amp outlet in the under-sink cabinet is sufficient for most residential installations.

The ES4 features a front-mounted temperature adjustment knob connected to an integrated thermostat with a sensing probe. The user can set the output water temperature anywhere within the 65 to 145 degree Fahrenheit operating range by turning the knob. The thermostat maintains the set temperature and reheats the tank as needed, so adjustments made at the knob take effect without requiring any additional tools or settings.

The ES4 includes a multi-directional mounting bracket that supports under-sink, wall-mounted, and floor-standing installation configurations. The unit's compact dimensions of 13.75 in. H x 13.75 in. W x 13.5 in. D and lightweight 17.3 lb. construction make it easy to handle and position in tight under-sink cabinet spaces. The mounting bracket is included in the box and does not require separate purchase.

RuralEnergy.com carries three models within the Bosch Tronic 3000T electric mini-tank water heater family: the ES2.5 with a 2.5-gallon tank, the ES4 with a 4-gallon tank, and the ES8 with an 8-gallon tank. Each model shares the same plug-in 120-volt design and point-of-use installation approach, with tank size selected based on the volume requirements of the specific fixture or application being served.

The ES4 includes a temperature and pressure relief valve, which automatically releases pressure if internal tank temperature or pressure exceeds safe operating limits. The unit is rated for a maximum operating water pressure of 150 psi. The glass-lined tank construction resists corrosion and contributes to the unit's 6-year limited warranty coverage. These safety features make the ES4 suitable for standard residential under-sink installation without additional safety accessories.