RELIANCE WATER HEATERS 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
RELIANCE WATER HEATERS HDHE-50 4** left the DOE listing between Oct 2, 2026 and Oct 17, 2026.
RELIANCE WATER HEATERS HDHE-50 4** was in the DOE listing by Oct 2, 2026.
RELIANCE WATER HEATERS 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.
Advertised and certified figures
| Figure | Advertised | Certified | Advertiser | Read |
|---|---|---|---|---|
| Size | 50 gal, nominal size | 49 gal storage volume | RELIANCE WATER HEATERS | Read Oct 5, 2026 |
| Size | 49 gal | 49 gal storage volume | RELIANCE WATER HEATERS | Read Oct 5, 2026 |
| UEF | 0.88 | 0.88 | RELIANCE WATER HEATERS | Read Oct 5, 2026 |
| First-hour rating | 118 gal | 118 gal | RELIANCE WATER HEATERS | Read Oct 5, 2026 |
Certified figures by listed model
| Model number | Storage volume (gal) | UEF | First-hour rating (gal) | Recovery efficiency | Draw pattern |
|---|---|---|---|---|---|
| 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 |
|---|---|---|---|---|
| 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. Over one hour from a full tank, it gave 118 gallons in the test (its first-hour rating). That is 69 gallons more than its tank holds, since it reheats during the hour.
Its single model number, 8-50-*TPDT 4**, is ENERGY STAR certified. In tests, 88% of the energy it uses ends up as hot water (UEF 0.88). Of the energy spent to reheat water, 97% goes into it (its recovery efficiency).
There are 4 more basic models with the same test figures. Those basic models are sold with American, GSW WATER HEATERS, and State as their brand names. You can find the whole group on the page for the A. O. Smith HDHE-50 4**.
In 3 states, 3 rebate programs may accept it. It may qualify for one more if it meets terms its figures do not show.
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
- Changes to an advertised figure after the date beside it.