DoesTheMath

ELIOS EROD150N0000 vs LAARS KGWH-150JFN: which uses less energy?

At the high draw pattern the LAARS KGWH-150JFN uses 173 therms a year and the ELIOS EROD150N0000 178 — 5 therms (3%) less, about 55 therms over ten years. Both are filed as a gas 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 a gas tankless unit at the high draw pattern.

Filed and computed figures
ELIOS EROD150N0000 LAARS KGWH-150JFN
UEF (Uniform Energy Factor) 0.95 0.98 (better)
Energy use per year (therms) 178 173 (better)
Max flow (GPM) 4.2 4.3
Installed cost range $2,358–$3,405 $2,499–$3,570
ENERGY STAR certified yes yes
Sound level (dB) not filed 44
On the market since 2026-01-28 2026-02-01
DOE CCD · 2026-09-19

What it costs to run

ELIOS EROD150N0000: 178 therms a year LAARS KGWH-150JFN: 173 therms a year

ELIOS EROD150N0000 — 178 therms a year LAARS KGWH-150JFN — 173 therms a year

LAARS KGWH-150JFN is 5 therms a year lower than ELIOS EROD150N0000.

DOE CCD · 2026-09-19

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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.
  • Both are ENERGY STAR certified, which requires a manufacturer warranty of at least six years; the actual term for each model is not published.
  • Time on the market, as filed with ENERGY STAR: the ELIOS EROD150N0000 since 2026-01-28, the LAARS KGWH-150JFN since 2026-02-01. A sale date, not a lifespan.

Which should you pick?

  • Pick the LAARS KGWH-150JFN if running cost matters most: it uses 5 therms less a year on the same test.
  • Pick the ELIOS EROD150N0000 if the installed price matters more than the running cost: its modeled installed range is $2,358–$3,405 against $2,499–$3,570.
  • Neither if you need more than 4.3 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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