DoesTheMath

BRADFORD WHITE RTGS150N1 vs ELIOS EROD150N0000: which uses less energy?

At the high draw pattern the BRADFORD WHITE RTGS150N1 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
BRADFORD WHITE RTGS150N1 ELIOS EROD150N0000
UEF (Uniform Energy Factor) 0.98 (better) 0.95
Energy use per year (therms) 173 (better) 178
Max flow (GPM) 4.3 4.2
Installed cost range $2,499–$3,570 $2,358–$3,405
ENERGY STAR certified yes yes
Sound level (dB) 44 not filed
On the market since 2026-02-01 2026-01-28
DOE CCD · 2026-09-19

What it costs to run

BRADFORD WHITE RTGS150N1: 173 therms a year ELIOS EROD150N0000: 178 therms a year

BRADFORD WHITE RTGS150N1 — 173 therms a year ELIOS EROD150N0000 — 178 therms a year

BRADFORD WHITE RTGS150N1 is 5 therms a year lower than ELIOS EROD150N0000.

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.
  • 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 BRADFORD WHITE RTGS150N1 since 2026-02-01, the ELIOS EROD150N0000 since 2026-01-28. A sale date, not a lifespan.

Which should you pick?

  • Pick the BRADFORD WHITE RTGS150N1 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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