DoesTheMath

GE GG40T**BXR01 vs Rheem PROG40-40N RH62: which uses less energy?

At the high draw pattern the Rheem PROG40-40N RH62 uses 256 therms a year and the GE GG40T**BXR01 264 — 8 therms (3%) less, about 80 therms over ten years. Both are filed as a gas tank, 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 tank at the high draw pattern.

Filed and computed figures
GE GG40T**BXR01 Rheem PROG40-40N RH62
UEF (Uniform Energy Factor) 0.64 0.66 (better)
Energy use per year (therms) 264 256 (better)
First hour rating (gal) 83 84
Rated storage volume (gal) 40 38
Installed cost range $1,673–$2,837 $1,760–$3,064
ENERGY STAR certified not matched not matched
DOE CCD · 2026-09-19

What it costs to run

GE GG40T**BXR01: 264 therms a year Rheem PROG40-40N RH62: 256 therms a year

GE GG40T**BXR01 — 264 therms a year Rheem PROG40-40N RH62 — 256 therms a year

Rheem PROG40-40N RH62 is 8 therms a year lower than GE GG40T**BXR01.

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.
  • The actual warranty term is printed in each model’s documentation, not in any registry.

Which should you pick?

  • Pick the Rheem PROG40-40N RH62 if running cost matters most: it uses 8 therms less a year on the same test.
  • Pick the GE GG40T**BXR01 if the installed price matters more than the running cost: its modeled installed range is $1,673–$2,837 against $1,760–$3,064.
  • Neither if your household's busiest hour needs more than 84 gallons of hot water — neither lists more. Check whether a 40-gallon heater is enough.

Each model on its own

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