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A. O. Smith GDHE-75 3**

A. O. Smith GDHE-75 3** is in the DOE listing as of Oct 26, 2026 and is in the ENERGY STAR list as of Oct 26, 2026.

It has a labeled size of 75 gallons, a certified storage volume of 74 gallons, a certified UEF of 0.86, and a certified first-hour rating of 130 gallons of hot water.

Its advertised UEF of up to 0.88 from A. O. Smith has a different test basis from the certified 0.86 (Read Oct 5, 2026).

  • Gas storage water heater
  • 1 listed model
Storage volume
74gallons
UEF
0.86Uniform energy factor
First-hour rating
130gallonsHot water in the first hour

Advertised and certified figures

A. O. Smith GDHE-75 3**: advertised and certified
A. O. Smith GDHE-75 3**: advertised and certified Size: advertised 75 gal, certified 74 gal (advertised nominal size, certified storage volume). Size: advertised 73.7 gal, certified 74 gal (certified storage volume). UEF: advertised 0.88, certified 0.86 (advertised up to). UEF: advertised 0.86, certified 0.86. Size · advertised nominal size, certified storage volume Advertised 75 gal Certified 74 gal Size · certified storage volume Advertised 73.7 gal Certified 74 gal UEF · advertised up to Advertised 0.88 Certified 0.86 UEF Advertised 0.86 Certified 0.86
FigureAdvertisedCertifiedAdvertiserRead
Size 75 gal, nominal size 74 gal storage volume A. O. Smith Read Oct 5, 2026
Size 73.7 gal 74 gal storage volume A. O. Smith Read Oct 5, 2026
UEF up to 0.88 0.86 A. O. Smith Read Oct 5, 2026
UEF 0.86 0.86 A. O. Smith Read Oct 5, 2026
First-hour rating 130 gal 130 gal A. O. Smith Read Oct 5, 2026

Certified figures by listed model

Model numberStorage volume (gal)UEFFirst-hour rating (gal)Recovery efficiencyDraw pattern
GDHE-75 3**740.8613096%—

UEF is the uniform energy factor. A dash means the model has no such figure.

ENERGY STAR certified models

Model numberStorage volume (gal)UEFFirst-hour rating (gal)Recovery efficiency
GDHE-75 3**740.8613096%

It holds 74 gallons in the test, 1 gallon less than its 75-gallon sold size. Over one hour from a full tank, it gave 130 gallons in the test (its first-hour rating). Reheating lets it give 56 gallons beyond the 74 gallons in its tank. In the first hour, 27 of the 763 gas storage models give more hot water. The median gas storage model gives 78 gallons in the first hour of the test.

The single model number sold under it is ENERGY STAR certified. In the test, 14% of its energy does not reach the hot water (UEF 0.86). When it reheats water in the test, 96% of the energy it uses ends up in the water.

There are 4 more basic models with the same test figures. Each of them is listed under a different brand.

In 3 states, 3 rebate programs may accept it. Another one program may accept it if it meets their other terms.

Also listed as

They carry every figure in the table above.

Rebates

ProgramStateStatusProgram page
Colorado Springs Utilities Water heater rebate (gas storage, gas tankless) CO May qualify Its own page
Nicor Gas Energy Efficiency Rebates for Your Home (gas storage) IL May qualify if it meets the other terms Its own page
DTE Energy Water Heaters (gas storage, gas tankless) MI May qualify Its own page
Avista Home and small commercial: HVAC and water heating incentives (gas storage) WA May qualify Its own page

Programs change their terms. Check the program's own page before you buy.

Updated Oct 26, 2026 · Methodology

Not covered

  • Changes to an advertised figure after the date beside it.