DoesTheMath

JETGLAS RE2HP50**-1NCTT vs NAVIEN NWP500S050AUMB: which uses less energy?

At the medium draw pattern the JETGLAS RE2HP50**-1NCTT uses 835 kWh a year and the NAVIEN NWP500S050AUMB 844 — 9 kWh (1%) less, about 87 kWh over ten years. Both are filed as an electric tank, 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 tank at the medium draw pattern.

Filed and computed figures
JETGLAS RE2HP50**-1NCTT NAVIEN NWP500S050AUMB
UEF (Uniform Energy Factor) 3.89 (better) 3.85
Energy use per year (kWh) 835 (better) 844
First hour rating (gal) 65 65
Rated storage volume (gal) 45 45
Installed cost range $3,040–$4,540 $3,036–$4,500
ENERGY STAR certified yes yes
Refrigerant R-134a, GWP 1430 R-134a, GWP 1430
On the market since 2025-07-16 2025-04-30
DOE CCD · 2026-09-19

What it costs to run

JETGLAS RE2HP50**-1NCTT: 835 kWh a year NAVIEN NWP500S050AUMB: 844 kWh a year

JETGLAS RE2HP50**-1NCTT — 835 kWh a year NAVIEN NWP500S050AUMB — 844 kWh a year

JETGLAS RE2HP50**-1NCTT is 9 kWh a year lower than NAVIEN NWP500S050AUMB.

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 JETGLAS RE2HP50**-1NCTT since 2025-07-16, the NAVIEN NWP500S050AUMB since 2025-04-30. A sale date, not a lifespan.

Which should you pick?

  • Pick the JETGLAS RE2HP50**-1NCTT if running cost matters most: it uses 9 kWh less a year on the same test.
  • Pick the NAVIEN NWP500S050AUMB if it is the one you can get installed sooner or for less — on the filed figures it has no advantage over the JETGLAS RE2HP50**-1NCTT.
  • Neither if your household's busiest hour needs more than 65 gallons of hot water — neither lists more. Check whether a 40-gallon heater is enough.

Each model on its own

Other comparisons

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