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Bosch TR4000C-3*

Bosch TR4000C-3* is in the DOE listing as of Oct 19, 2026.

  • Electric tankless water heater
  • 1 listed model

ENERGY STAR certification does not cover this type of water heater.

Its figures are also listed under Ariston AURES SM 3 CB 110V US*.

Flow at a 67°F rise
0.4gallons per minute
UEF
0.94Uniform energy factor
See it among every electric tankless model

Flow where you live

The heater gives less flow when colder incoming water needs a bigger rise.

Cold water
Cold water must be at least 10°F colder than the hot water setting.
Flow estimate
The estimate uses the lowest certified flow among the listed models. It is about 0.4 gal/min at a 70°F rise.

Flow limits

  • The estimate excludes the flow needed to turn the heater on, heat lost in pipes, and installation.
  • Cold water from a well or long pipe run can differ from the temperature you enter.
  • Without a stated flow limit, estimates for warmer water may exceed the heater’s actual flow.

Advertised and certified figures

Bosch TR4000C-3*: advertised and certified
Bosch TR4000C-3*: advertised and certified UEF: advertised 0.94, certified 0.94. Flow: advertised 0.59 gal/min, certified 0.4 gal/min (advertised at a 35°F rise, certified at a 67°F rise). UEF Advertised 0.94 Certified 0.94 Flow · advertised at a 35°F rise, certified at a 67°F rise Advertised 0.59 gal/min Certified 0.4 gal/min
FigureAdvertisedCertifiedAdvertiserRead
UEF 0.94 0.94 Bosch Read Oct 5, 2026
Flow 0.59 gal/min at a 35°F rise 0.4 gal/min at a 67°F rise Bosch Read Oct 5, 2026

Certified figures by listed model

Model numberUEFFlow at a 67°F rise (gal/min)Recovery efficiencyDraw pattern
TR4000C-3*0.940.494%Very small

UEF is the uniform energy factor. A dash means the model has no such figure.

It heats 0.4 gallons per minute of water by 67°F in the test. The electric tankless type has a median flow of 0.7 gallons per minute. Of 337 electric tankless models, 233 have a higher flow than this one.

In the test, 6% of its energy does not reach the hot water (UEF 0.94). Its test simulated a day of very small hot water use (its draw pattern). Of 272 electric tankless models with the same draw pattern, 187 have a higher UEF. For its type and draw pattern, the median UEF is 0.96. While it heats water, 94% of the energy used goes into the water (its recovery efficiency).

There is one more basic model with the same test figures. The brand name on that one is Ariston. You can find the whole group on the page for the Ariston AURES SM 3 CB 110V US*.

Also listed as

They carry every figure in the table above.

Updated Oct 19, 2026 · Methodology

Not covered

  • Changes to an advertised figure after the date beside it.