WattCost

Data through April 2026

Running cost · Water Heaters (Electric) · ENERGY STAR certified

Ruud PROUH50 T2 RU375-15

For a standard household draw pattern, the Ruud PROUH50 T2 RU375-15 uses a certified 846 kWh per year: roughly $159 annually at the national average rate. Compared with the median certified electric water heater, it uses 22% less electricity — rank 58 out of 566. The same unit costs $104 a year in North Dakota but $394 in Hawaii — electricity rates, not the appliance, make the difference.

Estimated annual running cost · U.S. average rate 18.8¢/kWh

$159/yr

$121 · cheapest certified water heaters (electric)$328 · priciest
Per month
$13.28
Per day
44¢
Certified use
846 kWh/yr
Type
Hybrid/Electric Heat Pump
Heat pump type
240 Volt Integrated HPWH
Storage volume
45 gal
First-hour rating
52 gal
UEF
3.75
643 kWh1,741 kWh
Where the Ruud PROUH50 T2 RU375-15 (▮) sits among all 566 certified water heaters (electric), by annual kWh

What it costs in every state

Ruud PROUH50 T2 RU375-15: 846 kWh/yr × each state's average residential rate (EIA)
StateRate ¢/kWhThis model $/yrRelative cost
Alabama17.4¢$147
Alaska27.4¢$231
Arizona15.5¢$131
Arkansas14.2¢$120
California35.3¢$298
Colorado16.5¢$140
Connecticut32.2¢$273
Delaware18.8¢$159
District of Columbia25.4¢$215
Florida15.4¢$130
Georgia15.4¢$130
Hawaiipriciest46.6¢$394
Idaho12.7¢$107
Illinois20.5¢$173
Indiana17.9¢$151
Iowa13.9¢$117
Kansas15.8¢$133
Kentucky15.0¢$127
Louisiana14.4¢$122
Maine28.4¢$240
Maryland22.1¢$187
Massachusetts29.4¢$249
Michigan21.4¢$181
Minnesota16.4¢$139
Mississippi16.8¢$142
Missouri14.0¢$119
Montana13.9¢$118
Nebraska13.3¢$112
Nevada14.3¢$121
New Hampshire27.2¢$230
New Jersey23.5¢$199
New Mexico15.2¢$128
New York29.4¢$249
North Carolina16.3¢$137
North Dakotacheapest12.3¢$104
Ohio19.5¢$165
Oklahoma13.3¢$113
Oregon15.8¢$133
Pennsylvania21.5¢$182
Rhode Island28.3¢$239
South Carolina17.1¢$144
South Dakota14.5¢$123
Tennessee14.9¢$126
Texas17.0¢$144
Utah13.3¢$112
Vermont24.6¢$208
Virginia17.4¢$147
Washington14.4¢$121
West Virginia16.1¢$136
Wisconsin19.2¢$163
Wyoming14.7¢$124

Certified models closest in efficiency

electric water heaters within reach of 846 kWh/yr
ModelkWh/yr$/yr (US avg)
Friedrich PROH50 T2 FD400-15846$159
Friedrich PROH50 T2 FD400-30846$159
Friedrich PROH50 T2 FD400-SO846$159
Rheem PROPH50 T2 RH375-15846$159
Rheem PROPH50 T2 RH375-30846$159
Rheem PROPH50 T2 RH400-15846$159

Run your own numbers

Your rate, your numbers

Per day
44¢
Per month
$13.28
Per year
$159

846 kWh/yr × 18.8¢/kWh = $159/yr

Prefilled with this model's certified 846 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 Ruud PROUH50 T2 RU375-15 use?
ENERGY STAR certifies the Ruud PROUH50 T2 RU375-15 at 846 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 Ruud PROUH50 T2 RU375-15 cost to run per month?
About $13.28 a month at the U.S. average residential rate (18.8¢/kWh) — 44¢ a day, or $159 a year. Your state's rate moves this up or down; see the table above.
Is the Ruud PROUH50 T2 RU375-15 energy efficient?
It uses 22% less electricity than the median certified electric water heater, placing it in the efficient third of certified models.
What does the Ruud PROUH50 T2 RU375-15 cost to run in the cheapest vs. priciest state?
At current residential rates it costs about $104 a year in North Dakota (12.3¢/kWh) and $394 in Hawaii (46.6¢/kWh).

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