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Chronomite CM

Chronomite CM is in the DOE listing as of Oct 26, 2026.

It has a certified UEF of 0.94 and a certified flow of 0.7 gal/min at a 67°F rise.

  • Electric tankless water heater
  • 1 listed model

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

Flow at a 67°F rise
0.7gallons per minute
UEF
0.94Uniform energy factor
See it among every electric tankless model

Flow where you live

Colder incoming water needs a bigger rise, so the heater gives less flow.

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 0.7 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.

Certified figures by listed model

Model numberUEFFlow at a 67°F rise (gal/min)Recovery efficiencyDraw pattern
CM-30L/2400.940.798%Very small

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

At a 67°F rise, its flow in the test is 0.7 gallons per minute. The electric tankless type has a median flow of 0.7 gallons per minute. Of 337 electric tankless models, 154 have a higher flow than this one.

In tests, 94% of the energy went to hot water, so its UEF is 0.94. Its test simulated a day of very small hot water use (its draw pattern). Its UEF is lower than that of 187 of the 272 electric tankless models with its draw pattern. On its draw pattern, the median electric tankless UEF is 0.96. Of the energy it spends heating water, 98% ends up in it (its recovery efficiency).

Updated Oct 26, 2026 · Methodology

Not covered

  • Advertised figures. We have none on file for this model.