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EEMAX SPEX3512T

EEMAX SPEX3512T 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 Rheem SPEX3012T.

Flow at a 67°F rise
0.3gallons per minuteCertified
Advertised flow
2.0gallons per minuteSupplyHouse, up to, no rise stated
UEF
0.96Uniform 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 0.3 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

EEMAX SPEX3512T: advertised and certified
EEMAX SPEX3512T: advertised and certified Flow: advertised 2.0 gal/min, certified 0.3 gal/min (advertised up to, no rise stated, certified at a 67°F rise). Flow: advertised 0.6 gal/min, certified 0.3 gal/min (advertised at a 40°F rise, certified at a 67°F rise). Flow: advertised 0.5 gal/min, certified 0.3 gal/min (advertised at a 50°F rise, certified at a 67°F rise). Flow: advertised 0.4 gal/min, certified 0.3 gal/min (advertised at a 60°F rise, certified at a 67°F rise). Flow · advertised up to, no rise stated, certified at a 67°F rise Advertised 2.0 gal/min Certified 0.3 gal/min Flow · advertised at a 40°F rise, certified at a 67°F rise Advertised 0.6 gal/min Certified 0.3 gal/min Flow · advertised at a 50°F rise, certified at a 67°F rise Advertised 0.5 gal/min Certified 0.3 gal/min Flow · advertised at a 60°F rise, certified at a 67°F rise Advertised 0.4 gal/min Certified 0.3 gal/min
FigureAdvertisedCertifiedAdvertiserRead
Flow up to 2.0 gal/min, no rise stated 0.3 gal/min at a 67°F rise SupplyHouse Archived copy, Feb 25, 2024
Flow 0.6 gal/min at a 40°F rise 0.3 gal/min at a 67°F rise SupplyHouse Archived copy, Feb 25, 2024
Flow 0.5 gal/min at a 50°F rise 0.3 gal/min at a 67°F rise SupplyHouse Archived copy, Feb 25, 2024
Flow 0.4 gal/min at a 60°F rise 0.3 gal/min at a 67°F rise SupplyHouse Archived copy, Feb 25, 2024
Flow 0.3 gal/min at a 70°F rise 0.3 gal/min at a 67°F rise SupplyHouse Archived copy, Feb 25, 2024

See how advertised flow compares across tankless models

Certified figures by listed model

Model numberUEFFlow at a 67°F rise (gal/min)Recovery efficiencyDraw pattern
SPEX3512T0.960.398%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 0.3 gallons per minute. The electric tankless type has a median flow of 0.7 gallons per minute. Of 337 electric tankless models, 271 have a higher flow than this one.

In tests, 96% of the energy it uses ends up as hot water (UEF 0.96). Its test simulated a day of very small hot water use (its draw pattern). Its UEF is lower than that of 77 of the 272 electric tankless models with its draw pattern. For its type and draw pattern, its UEF sits at the median. When it runs, 98% of the energy it uses reaches the water (its recovery efficiency).

There are 5 more basic models with the same test figures. Of those, one or more are under the Aquapower, Rheem, and Stiebel Eltron brands. You can find the whole group on the page for the Rheem SPEX3012T.

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.