WattCost

Data through June 2026

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

Ruud PROUH40 T2 RU350BM

For a standard household draw pattern, the Ruud PROUH40 T2 RU350BM uses a certified 879 kWh per year: roughly $161 annually at the national average rate. Compared with the median certified electric water heater, it uses 27% less electricity — rank 90 out of 510. The same unit costs $115 a year in Nevada but $463 in Hawaii — electricity rates, not the appliance, make the difference.

Dimensions 62.3" H × 20.3" W

Estimated annual running cost · U.S. average rate 18.3¢/kWh

$161/yr

$125 · cheapest certified water heaters (electric)$319 · priciest
Per month
$13.43
Per day
44¢
Certified use
879 kWh/yr
Type
Hybrid/Electric Heat Pump
Heat pump type
240 Volt Integrated HPWH
Storage volume
36 gal
First-hour rating
60 gal
UEF
3.5
681 kWh1,741 kWh
Where the Ruud PROUH40 T2 RU350BM (▮) sits among all 510 certified water heaters (electric), by annual kWh

What it costs in every state

Ruud PROUH40 T2 RU350BM: 879 kWh/yr × each state's average residential rate (EIA)
StateRate ¢/kWhThis model $/yrRelative cost
Alabama16.4¢$144
Alaska28.2¢$248
Arizona15.2¢$133
Arkansas14.1¢$124
California34.7¢$305
Colorado17.1¢$151
Connecticut24.3¢$214
Delaware19.3¢$170
District of Columbia24.4¢$214
Florida15.1¢$133
Georgia16.4¢$144
Hawaiipriciest52.7¢$463
Idaho14.4¢$126
Illinois19.9¢$175
Indiana17.5¢$154
Iowa15.9¢$140
Kansas15.7¢$138
Kentucky14.3¢$125
Louisiana13.5¢$119
Maine29.6¢$260
Maryland21.8¢$192
Massachusetts29.6¢$260
Michigan23.0¢$202
Minnesota17.5¢$154
Mississippi14.9¢$131
Missouri16.2¢$143
Montana15.1¢$133
Nebraska13.3¢$116
Nevadacheapest13.1¢$115
New Hampshire27.0¢$237
New Jersey24.9¢$219
New Mexico15.1¢$132
New York29.5¢$259
North Carolina14.7¢$130
North Dakota14.1¢$124
Ohio19.2¢$169
Oklahoma14.3¢$126
Oregon16.3¢$143
Pennsylvania21.7¢$191
Rhode Island29.2¢$257
South Carolina15.6¢$137
South Dakota15.4¢$135
Tennessee14.1¢$124
Texas15.9¢$140
Utah13.4¢$118
Vermont24.4¢$215
Virginia17.2¢$151
Washington14.9¢$131
West Virginia15.4¢$136
Wisconsin19.6¢$172
Wyoming15.2¢$134

Certified models closest in efficiency

electric water heaters within reach of 879 kWh/yr
ModelkWh/yr$/yr (US avg)
Friedrich PROH40 T2 FD310BM879$161
Friedrich PROH40 T2 FD310UM879$161
Friedrich PROH40 T2 FD350BM879$161
Friedrich PROH40 T2 FD350UM879$161
Rheem PRO H40 T2 RH310BM879$161
Rheem PRO H40 T2 RH310UM879$161

Run your own numbers

Your rate, your numbers

Per day
44¢
Per month
$13.43
Per year
$161

879 kWh/yr × 18.3¢/kWh = $161/yr

Prefilled with this model's certified 879 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 RU350BM use?
ENERGY STAR certifies the Ruud PROUH40 T2 RU350BM at 879 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 RU350BM cost to run per month?
About $13.43 a month at the U.S. average residential rate (18.3¢/kWh) — 44¢ a day, or $161 a year. Your state's rate moves this up or down; see the table above.
Is the Ruud PROUH40 T2 RU350BM energy efficient?
It uses 27% less electricity than the median certified electric water heater, placing it in the efficient third of certified models.
What does the Ruud PROUH40 T2 RU350BM cost to run in the cheapest vs. priciest state?
At current residential rates it costs about $115 a year in Nevada (13.1¢/kWh) and $463 in Hawaii (52.7¢/kWh).

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