Data through June 2026
Running cost · Water Heaters (Electric) · ENERGY STAR certified
Ariston ARIHPWH-50
Heating a typical household's hot water, the Ariston ARIHPWH-50 is certified at 867 kWh a year — about $159 at the U.S. average electricity rate, or $13.25 a month. Compared with the median certified electric water heater, it uses 28% less electricity — rank 77 out of 510. The same unit costs $114 a year in Nevada but $457 in Hawaii — electricity rates, not the appliance, make the difference.
Dimensions 45.8" H × 18.2" W
Estimated annual running cost · U.S. average rate 18.3¢/kWh
$159/yr
- Per month
- $13.25
- Per day
- 44¢
- Certified use
- 867 kWh/yr
- Type
- Hybrid/Electric Heat Pump
- Heat pump type
- 240 Volt Integrated HPWH
- Storage volume
- 45 gal
- First-hour rating
- 68 gal
- UEF
- 3.75
What it costs in every state
| State | Rate ¢/kWh | This model $/yr | Relative cost |
|---|---|---|---|
| Alabama | 16.4¢ | $142 | |
| Alaska | 28.2¢ | $245 | |
| Arizona | 15.2¢ | $132 | |
| Arkansas | 14.1¢ | $122 | |
| California | 34.7¢ | $301 | |
| Colorado | 17.1¢ | $149 | |
| Connecticut | 24.3¢ | $211 | |
| Delaware | 19.3¢ | $167 | |
| District of Columbia | 24.4¢ | $211 | |
| Florida | 15.1¢ | $131 | |
| Georgia | 16.4¢ | $142 | |
| Hawaiipriciest | 52.7¢ | $457 | |
| Idaho | 14.4¢ | $125 | |
| Illinois | 19.9¢ | $172 | |
| Indiana | 17.5¢ | $152 | |
| Iowa | 15.9¢ | $138 | |
| Kansas | 15.7¢ | $136 | |
| Kentucky | 14.3¢ | $124 | |
| Louisiana | 13.5¢ | $117 | |
| Maine | 29.6¢ | $257 | |
| Maryland | 21.8¢ | $189 | |
| Massachusetts | 29.6¢ | $257 | |
| Michigan | 23.0¢ | $199 | |
| Minnesota | 17.5¢ | $152 | |
| Mississippi | 14.9¢ | $129 | |
| Missouri | 16.2¢ | $141 | |
| Montana | 15.1¢ | $131 | |
| Nebraska | 13.3¢ | $115 | |
| Nevadacheapest | 13.1¢ | $114 | |
| New Hampshire | 27.0¢ | $234 | |
| New Jersey | 24.9¢ | $216 | |
| New Mexico | 15.1¢ | $131 | |
| New York | 29.5¢ | $256 | |
| North Carolina | 14.7¢ | $128 | |
| North Dakota | 14.1¢ | $122 | |
| Ohio | 19.2¢ | $166 | |
| Oklahoma | 14.3¢ | $124 | |
| Oregon | 16.3¢ | $141 | |
| Pennsylvania | 21.7¢ | $188 | |
| Rhode Island | 29.2¢ | $253 | |
| South Carolina | 15.6¢ | $135 | |
| South Dakota | 15.4¢ | $133 | |
| Tennessee | 14.1¢ | $122 | |
| Texas | 15.9¢ | $138 | |
| Utah | 13.4¢ | $116 | |
| Vermont | 24.4¢ | $212 | |
| Virginia | 17.2¢ | $149 | |
| Washington | 14.9¢ | $129 | |
| West Virginia | 15.4¢ | $134 | |
| Wisconsin | 19.6¢ | $170 | |
| Wyoming | 15.2¢ | $132 |
Certified models closest in efficiency
| Model | kWh/yr | $/yr (US avg) |
|---|---|---|
| AMERICAN STANDARD WATER HEATERS ASHPWH-50 | 867 | $159 |
| LG R5TT20F-SA0 (208V) | 866 | $159 |
| LG R5TT20F-SA0 (240V) | 866 | $159 |
| SANCO2 GS5-45HPC-D HP + ECO-43SSAQB | 868 | $159 |
| SANCO2 GS5-45HPC HP + ECO-43SSAQB | 868 | $159 |
| Midea CAN3-RSJ-15/190RDVN3-L4 | 861 | $158 |
Run your own numbers
Your rate, your numbers
- Per day
- 44¢
- Per month
- $13.25
- Per year
- $159
867 kWh/yr × 18.3¢/kWh = $159/yr
Prefilled with this model's certified 867 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 Ariston ARIHPWH-50 use?
- ENERGY STAR certifies the Ariston ARIHPWH-50 at 867 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 Ariston ARIHPWH-50 cost to run per month?
- About $13.25 a month at the U.S. average residential rate (18.3¢/kWh) — 44¢ a day, or $159 a year. Your state's rate moves this up or down; see the table above.
- Is the Ariston ARIHPWH-50 energy efficient?
- It uses 28% less electricity than the median certified electric water heater, placing it in the efficient third of certified models.
- What does the Ariston ARIHPWH-50 cost to run in the cheapest vs. priciest state?
- At current residential rates it costs about $114 a year in Nevada (13.1¢/kWh) and $457 in Hawaii (52.7¢/kWh).