DoesTheMath

EEMAX SPEX1812T vs KWICKSHOT TEF024V120: which uses less energy?

At the very small draw pattern the EEMAX SPEX1812T uses 615 kWh a year and the KWICKSHOT TEF024V120 622 — 6 kWh (1%) less, about 65 kWh over ten years. Both are filed as an electric tankless unit, so the comparison holds. Enter your ZIP below to price the difference.

Side by side

Compared within one class only: models filed as an electric tankless unit at the very small draw pattern.

Filed and computed figures
EEMAX SPEX1812T KWICKSHOT TEF024V120
UEF (Uniform Energy Factor) 0.96 (better) 0.95
Energy use per year (kWh) 615 (better) 622
Max flow (GPM) 0.2 0.2
Installed cost range $1,306–$1,838 $1,303–$1,814
ENERGY STAR certified not matched not matched
DOE CCD · 2026-09-19

What it costs to run

EEMAX SPEX1812T: 615 kWh a year KWICKSHOT TEF024V120: 622 kWh a year

EEMAX SPEX1812T — 615 kWh a year KWICKSHOT TEF024V120 — 622 kWh a year

EEMAX SPEX1812T is 7 kWh a year lower than KWICKSHOT TEF024V120.

DOE CCD · 2026-09-19

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Enter your ZIP to price both units on the same rate where you live.

Reliability

Not published: Reliability, failure rates and each model’s actual warranty term.

The registries these figures come from certify energy performance under a federal test; none of them records how long a unit lasts or how often it fails, so this page does not rank the two on reliability.

What is here instead:

  • The filed efficiency, capacity and tank size of both models, side by side below.
  • The actual warranty term is printed in each model’s documentation, not in any registry.

Which should you pick?

  • Pick the EEMAX SPEX1812T if running cost matters most: it uses 6 kWh less a year on the same test.
  • Pick the KWICKSHOT TEF024V120 if it is the one you can get installed sooner or for less — on the filed figures it has no advantage over the EEMAX SPEX1812T.
  • Neither if you need more than 0.2 GPM at the same time — neither unit lists more. Check how to size a tankless unit by GPM.

Each model on its own

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