Data through June 2026
Running cost · Water Heaters (Electric) · ENERGY STAR certified
RELIANCE WATER HEATERS 10-66-DHPHTCTA 1
Heating a typical household's hot water, the RELIANCE WATER HEATERS 10-66-DHPHTCTA 1 is certified at 1,381 kWh a year — about $253 at the U.S. average electricity rate, or $21.11 a month. Even among certified models it's on the thirsty end: 14% more electricity than the median electric water heater, ranked 437 of 510. The same unit costs $181 a year in Nevada but $728 in Hawaii — electricity rates, not the appliance, make the difference.
Dimensions 61" H × 23" W
Estimated annual running cost · U.S. average rate 18.3¢/kWh
$253/yr
- Per month
- $21.11
- Per day
- 69¢
- Certified use
- 1,381 kWh/yr
- Type
- Hybrid/Electric Heat Pump
- Heat pump type
- 240 Volt Integrated HPWH
- Storage volume
- 67 gal
- First-hour rating
- 79 gal
- UEF
- 3.45
What it costs in every state
| State | Rate ¢/kWh | This model $/yr | Relative cost |
|---|---|---|---|
| Alabama | 16.4¢ | $226 | |
| Alaska | 28.2¢ | $390 | |
| Arizona | 15.2¢ | $210 | |
| Arkansas | 14.1¢ | $195 | |
| California | 34.7¢ | $480 | |
| Colorado | 17.1¢ | $237 | |
| Connecticut | 24.3¢ | $336 | |
| Delaware | 19.3¢ | $266 | |
| District of Columbia | 24.4¢ | $337 | |
| Florida | 15.1¢ | $209 | |
| Georgia | 16.4¢ | $226 | |
| Hawaiipriciest | 52.7¢ | $728 | |
| Idaho | 14.4¢ | $198 | |
| Illinois | 19.9¢ | $275 | |
| Indiana | 17.5¢ | $242 | |
| Iowa | 15.9¢ | $220 | |
| Kansas | 15.7¢ | $217 | |
| Kentucky | 14.3¢ | $197 | |
| Louisiana | 13.5¢ | $186 | |
| Maine | 29.6¢ | $409 | |
| Maryland | 21.8¢ | $302 | |
| Massachusetts | 29.6¢ | $409 | |
| Michigan | 23.0¢ | $317 | |
| Minnesota | 17.5¢ | $242 | |
| Mississippi | 14.9¢ | $205 | |
| Missouri | 16.2¢ | $224 | |
| Montana | 15.1¢ | $209 | |
| Nebraska | 13.3¢ | $183 | |
| Nevadacheapest | 13.1¢ | $181 | |
| New Hampshire | 27.0¢ | $373 | |
| New Jersey | 24.9¢ | $345 | |
| New Mexico | 15.1¢ | $208 | |
| New York | 29.5¢ | $407 | |
| North Carolina | 14.7¢ | $204 | |
| North Dakota | 14.1¢ | $195 | |
| Ohio | 19.2¢ | $265 | |
| Oklahoma | 14.3¢ | $198 | |
| Oregon | 16.3¢ | $225 | |
| Pennsylvania | 21.7¢ | $300 | |
| Rhode Island | 29.2¢ | $404 | |
| South Carolina | 15.6¢ | $215 | |
| South Dakota | 15.4¢ | $212 | |
| Tennessee | 14.1¢ | $194 | |
| Texas | 15.9¢ | $220 | |
| Utah | 13.4¢ | $185 | |
| Vermont | 24.4¢ | $338 | |
| Virginia | 17.2¢ | $238 | |
| Washington | 14.9¢ | $206 | |
| West Virginia | 15.4¢ | $213 | |
| Wisconsin | 19.6¢ | $270 | |
| Wyoming | 15.2¢ | $210 |
Certified models closest in efficiency
| Model | kWh/yr | $/yr (US avg) |
|---|---|---|
| A. O. Smith HPTU-66CTA 1 | 1,381 | $253 |
| A. O. Smith HPTU-66DR 1 | 1,381 | $253 |
| A. O. Smith HPTU-66N 1 | 1,381 | $253 |
| American HPHE10266H045DVCTA-1 | 1,381 | $253 |
| American HPHE10266H045DVDR 1 | 1,381 | $253 |
| American HPHE10266H045DVN 1 | 1,381 | $253 |
Run your own numbers
Your rate, your numbers
- Per day
- 69¢
- Per month
- $21.11
- Per year
- $253
1,381 kWh/yr × 18.3¢/kWh = $253/yr
Prefilled with this model's certified 1,381 kWh/yr — adjust if your usage differs from the DOE test basis. The certified annual kWh comes from the DOE Uniform Energy Factor test, which simulates a typical household's daily hot-water draw pattern. Only electric models (including heat-pump units) are listed — gas models burn gas, not kWh.
Questions, answered with the data
- How much electricity does the RELIANCE WATER HEATERS 10-66-DHPHTCTA 1 use?
- ENERGY STAR certifies the RELIANCE WATER HEATERS 10-66-DHPHTCTA 1 at 1,381 kWh per year. The certified annual kWh comes from the DOE Uniform Energy Factor test, which simulates a typical household's daily hot-water draw pattern. Only electric models (including heat-pump units) are listed — gas models burn gas, not kWh.
- How much does the RELIANCE WATER HEATERS 10-66-DHPHTCTA 1 cost to run per month?
- About $21.11 a month at the U.S. average residential rate (18.3¢/kWh) — 69¢ a day, or $253 a year. Your state's rate moves this up or down; see the table above.
- Is the RELIANCE WATER HEATERS 10-66-DHPHTCTA 1 energy efficient?
- It uses 14% more electricity than the median certified electric water heater, which puts it among the least efficient certified models.
- What does the RELIANCE WATER HEATERS 10-66-DHPHTCTA 1 cost to run in the cheapest vs. priciest state?
- At current residential rates it costs about $181 a year in Nevada (13.1¢/kWh) and $728 in Hawaii (52.7¢/kWh).