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A. O. Smith GPHE-50 1**

A. O. Smith GPHE-50 1** is not in the current certification listing as of Oct 26, 2026.

It has a labeled size of 50 gallons, a certified storage volume of 48 gallons, a certified UEF of 0.88, and a certified first-hour rating of 119 gallons of hot water.

Its advertised UEF of 0.88 from A. O. Smith matches the certified 0.88 (Read Oct 5, 2026).

  • Gas storage water heater
  • 1 listed model

This model is not in the current certification listing as of Oct 26, 2026. It was last listed on Oct 2, 2026.

Storage volume
48gallons
UEF
0.88Uniform energy factor
First-hour rating
119gallonsHot water in the first hour

Product history

A. O. Smith GPHE-50 1** left the DOE listing between Oct 2, 2026 and Oct 17, 2026.

A. O. Smith GPHE-50 1** was in the DOE listing by Oct 2, 2026.

A. O. Smith GPHE-50 1** has a recorded ENERGY STAR market-availability date of Mar 12, 2017. It was in the ENERGY STAR list by Aug 11, 2023.

Advertised and certified figures

A. O. Smith GPHE-50 1**: advertised and certified
A. O. Smith GPHE-50 1**: advertised and certified Size: advertised 50 gal, certified 48 gal (advertised nominal size, certified storage volume). Size: advertised 48 gal, certified 48 gal (certified storage volume). UEF: advertised 0.88, certified 0.88. UEF: advertised 0.88, certified 0.88 (advertised up to). Size · advertised nominal size, certified storage volume Advertised 50 gal Certified 48 gal Size · certified storage volume Advertised 48 gal Certified 48 gal UEF Advertised 0.88 Certified 0.88 UEF · advertised up to Advertised 0.88 Certified 0.88
FigureAdvertisedCertifiedAdvertiserRead
Size 50 gal, nominal size 48 gal storage volume A. O. Smith Read Oct 5, 2026
Size 48 gal 48 gal storage volume A. O. Smith Read Oct 5, 2026
UEF 0.88 0.88 A. O. Smith Read Oct 5, 2026
UEF up to 0.88 0.88 A. O. Smith Read Oct 5, 2026
First-hour rating 124 gal 119 gal A. O. Smith Read Oct 5, 2026
First-hour rating 119 gal 119 gal A. O. Smith Read Oct 5, 2026

Certified figures by listed model

Model numberStorage volume (gal)UEFFirst-hour rating (gal)Recovery efficiencyDraw pattern
GPHE-50 1**480.8811993%—

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
GPHE-50 1**480.8811993%

It holds 48 gallons in the test, 2 gallons less than its 50-gallon sold size. It delivers 119 gallons of hot water in the test's first hour. Reheating lets it give 71 gallons beyond the 48 gallons in its tank.

It is ENERGY STAR certified under its single model number. In the test, 12% of its energy does not reach the hot water (UEF 0.88). When it reheats water in the test, 93% of the energy it uses ends up in the water.

All of its test figures are shared by 5 other basic models. Between them, those basic models carry 4 other brand names.

It may qualify for 3 rebate programs. 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.