WattCost

Data through April 2026

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

Ruud PROUH40 T2 RU375-30

For a standard household draw pattern, the Ruud PROUH40 T2 RU375-30 uses a certified 859 kWh per year: roughly $162 annually at the national average rate. Compared with the median certified electric water heater, it uses 21% less electricity — rank 102 out of 566. The same unit costs $106 a year in North Dakota but $400 in Hawaii — electricity rates, not the appliance, make the difference.

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

$162/yr

$121 · cheapest certified water heaters (electric)$328 · priciest
Per month
$13.48
Per day
44¢
Certified use
859 kWh/yr
Type
Hybrid/Electric Heat Pump
Heat pump type
240 Volt Integrated HPWH
Storage volume
36 gal
First-hour rating
60 gal
UEF
3.83
643 kWh1,741 kWh
Where the Ruud PROUH40 T2 RU375-30 (▮) sits among all 566 certified water heaters (electric), by annual kWh

What it costs in every state

Ruud PROUH40 T2 RU375-30: 859 kWh/yr × each state's average residential rate (EIA)
StateRate ¢/kWhThis model $/yrRelative cost
Alabama17.4¢$150
Alaska27.4¢$235
Arizona15.5¢$133
Arkansas14.2¢$122
California35.3¢$303
Colorado16.5¢$142
Connecticut32.2¢$277
Delaware18.8¢$161
District of Columbia25.4¢$218
Florida15.4¢$132
Georgia15.4¢$132
Hawaiipriciest46.6¢$400
Idaho12.7¢$109
Illinois20.5¢$176
Indiana17.9¢$154
Iowa13.9¢$119
Kansas15.8¢$136
Kentucky15.0¢$129
Louisiana14.4¢$124
Maine28.4¢$244
Maryland22.1¢$190
Massachusetts29.4¢$253
Michigan21.4¢$184
Minnesota16.4¢$141
Mississippi16.8¢$144
Missouri14.0¢$120
Montana13.9¢$119
Nebraska13.3¢$114
Nevada14.3¢$123
New Hampshire27.2¢$234
New Jersey23.5¢$202
New Mexico15.2¢$130
New York29.4¢$253
North Carolina16.3¢$140
North Dakotacheapest12.3¢$106
Ohio19.5¢$167
Oklahoma13.3¢$114
Oregon15.8¢$136
Pennsylvania21.5¢$184
Rhode Island28.3¢$243
South Carolina17.1¢$147
South Dakota14.5¢$125
Tennessee14.9¢$128
Texas17.0¢$146
Utah13.3¢$114
Vermont24.6¢$211
Virginia17.4¢$149
Washington14.4¢$123
West Virginia16.1¢$138
Wisconsin19.2¢$165
Wyoming14.7¢$126

Certified models closest in efficiency

electric water heaters within reach of 859 kWh/yr
ModelkWh/yr$/yr (US avg)
Friedrich PROH40 T2 FD400-30859$162
Friedrich PROH40 T2 FD400-SO859$162
Rheem PROPH40 T2 RH375-30859$162
Rheem PROPH40 T2 RH375-SO859$162
Rheem PROPH40 T2 RH400-30859$162
Rheem PROPH40 T2 RH400-SO859$162

Run your own numbers

Your rate, your numbers

Per day
44¢
Per month
$13.48
Per year
$162

859 kWh/yr × 18.8¢/kWh = $162/yr

Prefilled with this model's certified 859 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 PROUH40 T2 RU375-30 use?
ENERGY STAR certifies the Ruud PROUH40 T2 RU375-30 at 859 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 PROUH40 T2 RU375-30 cost to run per month?
About $13.48 a month at the U.S. average residential rate (18.8¢/kWh) — 44¢ a day, or $162 a year. Your state's rate moves this up or down; see the table above.
Is the Ruud PROUH40 T2 RU375-30 energy efficient?
It uses 21% less electricity than the median certified electric water heater, placing it in the efficient third of certified models.
What does the Ruud PROUH40 T2 RU375-30 cost to run in the cheapest vs. priciest state?
At current residential rates it costs about $106 a year in North Dakota (12.3¢/kWh) and $400 in Hawaii (46.6¢/kWh).

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