State HDHE-50 4**
- 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.
Its figures are also listed under A. O. Smith HDHE-50 4**.
Certified figures
- Storage volume
- 49gallons
- UEF
- 0.88Uniform energy factor
- First-hour rating
- 118gallonsHot water in the first hour
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Change your hourProduct history
State HDHE-50 4** left the DOE listing between Oct 2, 2026 and Oct 17, 2026.
State HDHE-50 4** was in the DOE listing by Oct 2, 2026.
State HDHE-50 4** has a recorded ENERGY STAR market-availability date of Aug 15, 2025. It first appeared in the ENERGY STAR list between October 2025 and February 2026.
Certified figures by listed model
| Model number | Storage volume (gal) | UEF | First-hour rating (gal) | Recovery efficiency | Draw pattern |
|---|---|---|---|---|---|
| GP-8-50-*TPDT 4** | 49 | 0.88 | 118 | 97% | — |
UEF is the uniform energy factor. A dash means the model has no such figure.
ENERGY STAR certified models
| Model number | Storage volume (gal) | UEF | First-hour rating (gal) | Recovery efficiency |
|---|---|---|---|---|
| GP-8-50-*TPDT 4** | 49 | 0.88 | 118 | 97% |
It holds 49 gallons in the test, 1 gallon less than its 50-gallon sold size. It delivers 118 gallons of hot water in the test's first hour. Reheating lets it give 69 gallons beyond the 49 gallons in its tank.
It is ENERGY STAR certified under its single model number. In tests, 88% of the energy it uses ends up as hot water (UEF 0.88). When it reheats water in the test, 97% of the energy it uses ends up in the water.
Its test figures match those of 4 other basic models. Those basic models are sold with American, GSW WATER HEATERS, and RELIANCE WATER HEATERS as their brand names. You can find the whole group on the page for the A. O. Smith HDHE-50 4**.
It may qualify for 3 rebate programs in 3 states. Another one rebate program may accept it if it meets their other terms.
Also listed as
They carry every figure in the table above.
Rebates
| Program | State | Status | Program 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.
Not covered
- Advertised figures. We have none on file for this model.