DoesTheMath

GREE GRS-3.0Pd/TD70GANhA-D vs HUBBELL ME120HPT: which uses less energy?

At the high draw pattern the GREE GRS-3.0Pd/TD70GANhA-D uses 1,231 kWh a year and the HUBBELL ME120HPT 1,468 — 237 kWh (16%) less, about 2,367 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 high draw pattern.

Filed and computed figures
GREE GRS-3.0Pd/TD70GANhA-D HUBBELL ME120HPT
UEF (Uniform Energy Factor) 4.03 (better) 3.38
Energy use per year (kWh) 1,231 (better) 1,468
First hour rating (gal) 100 105
Rated storage volume (gal) 68 109
Installed cost range $3,802–$4,897 not published
ENERGY STAR certified yes yes
Sound level (dB) not filed 54
Refrigerant R-32 R-134a, GWP 1430
On the market since 2025-11-17 2023-09-01
DOE CCD · 2026-09-19

What it costs to run

GREE GRS-3.0Pd/TD70GANhA-D: 1,231 kWh a year HUBBELL ME120HPT: 1,468 kWh a year

GREE GRS-3.0Pd/TD70GANhA-D — 1,231 kWh a year HUBBELL ME120HPT — 1,468 kWh a year

GREE GRS-3.0Pd/TD70GANhA-D is 237 kWh a year lower than HUBBELL ME120HPT.

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 GREE GRS-3.0Pd/TD70GANhA-D since 2025-11-17, the HUBBELL ME120HPT since 2023-09-01. A sale date, not a lifespan.

Which should you pick?

  • Pick the GREE GRS-3.0Pd/TD70GANhA-D if running cost matters most: it uses 237 kWh less a year on the same test.
  • Pick the HUBBELL ME120HPT if you need more hot water in your busiest hour: it lists a first hour rating of 105 gallons against 100.
  • Neither if your household's busiest hour needs more than 105 gallons of hot water — neither lists more. Check whether a 65-gallon heater is enough.

Each model on its own

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