WattCost

Data through April 2026

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

Rheem PROUH80 T2 RH350UM

For a standard household draw pattern, the Rheem PROUH80 T2 RH350UM uses a certified 1,303 kWh per year: roughly $245 annually at the national average rate. Even among certified models it's on the thirsty end: 20% more electricity than the median electric water heater, ranked 438 of 566. The same unit costs $161 a year in North Dakota but $607 in Hawaii — electricity rates, not the appliance, make the difference.

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

$245/yr

$121 · cheapest certified water heaters (electric)$328 · priciest
Per month
$20.45
Per day
67¢
Certified use
1,303 kWh/yr
Type
Hybrid/Electric Heat Pump
Heat pump type
240 Volt Integrated HPWH
Storage volume
72 gal
First-hour rating
87 gal
UEF
3.5
643 kWh1,741 kWh
Where the Rheem PROUH80 T2 RH350UM (▮) sits among all 566 certified water heaters (electric), by annual kWh

What it costs in every state

Rheem PROUH80 T2 RH350UM: 1,303 kWh/yr × each state's average residential rate (EIA)
StateRate ¢/kWhThis model $/yrRelative cost
Alabama17.4¢$227
Alaska27.4¢$356
Arizona15.5¢$202
Arkansas14.2¢$185
California35.3¢$459
Colorado16.5¢$216
Connecticut32.2¢$420
Delaware18.8¢$245
District of Columbia25.4¢$331
Florida15.4¢$200
Georgia15.4¢$200
Hawaiipriciest46.6¢$607
Idaho12.7¢$165
Illinois20.5¢$267
Indiana17.9¢$233
Iowa13.9¢$181
Kansas15.8¢$206
Kentucky15.0¢$196
Louisiana14.4¢$188
Maine28.4¢$370
Maryland22.1¢$288
Massachusetts29.4¢$384
Michigan21.4¢$279
Minnesota16.4¢$214
Mississippi16.8¢$218
Missouri14.0¢$183
Montana13.9¢$181
Nebraska13.3¢$173
Nevada14.3¢$186
New Hampshire27.2¢$355
New Jersey23.5¢$307
New Mexico15.2¢$197
New York29.4¢$384
North Carolina16.3¢$212
North Dakotacheapest12.3¢$161
Ohio19.5¢$254
Oklahoma13.3¢$173
Oregon15.8¢$206
Pennsylvania21.5¢$280
Rhode Island28.3¢$369
South Carolina17.1¢$222
South Dakota14.5¢$189
Tennessee14.9¢$195
Texas17.0¢$221
Utah13.3¢$173
Vermont24.6¢$320
Virginia17.4¢$226
Washington14.4¢$187
West Virginia16.1¢$209
Wisconsin19.2¢$250
Wyoming14.7¢$191

Certified models closest in efficiency

electric water heaters within reach of 1,303 kWh/yr
ModelkWh/yr$/yr (US avg)
Friedrich PROH80 T2 FD310BM1,303$245
Friedrich PROH80 T2 FD310UM1,303$245
Friedrich PROH80 T2 FD350BM1,303$245
Friedrich PROH80 T2 FD350UM1,303$245
Rheem PRO H80 T2 RH310BM1,303$245
Rheem PRO H80 T2 RH310UM1,303$245

Run your own numbers

Your rate, your numbers

Per day
67¢
Per month
$20.45
Per year
$245

1,303 kWh/yr × 18.8¢/kWh = $245/yr

Prefilled with this model's certified 1,303 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 Rheem PROUH80 T2 RH350UM use?
ENERGY STAR certifies the Rheem PROUH80 T2 RH350UM at 1,303 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 Rheem PROUH80 T2 RH350UM cost to run per month?
About $20.45 a month at the U.S. average residential rate (18.8¢/kWh) — 67¢ a day, or $245 a year. Your state's rate moves this up or down; see the table above.
Is the Rheem PROUH80 T2 RH350UM energy efficient?
It uses 20% more electricity than the median certified electric water heater, which puts it among the least efficient certified models.
What does the Rheem PROUH80 T2 RH350UM cost to run in the cheapest vs. priciest state?
At current residential rates it costs about $161 a year in North Dakota (12.3¢/kWh) and $607 in Hawaii (46.6¢/kWh).

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