WattCost

Data through June 2026

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

Ruud PRO H50 T2 RU310UM

For a standard household draw pattern, the Ruud PRO H50 T2 RU310UM uses a certified 915 kWh per year: roughly $168 annually at the national average rate. Compared with the median certified electric water heater, it uses 24% less electricity — rank 158 out of 510. The same unit costs $120 a year in Nevada but $482 in Hawaii — electricity rates, not the appliance, make the difference.

Dimensions 61.8" H × 22.3" W

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

$168/yr

$125 · cheapest certified water heaters (electric)$319 · priciest
Per month
$13.98
Per day
46¢
Certified use
915 kWh/yr
Type
Hybrid/Electric Heat Pump
Heat pump type
240 Volt Integrated HPWH
Storage volume
45 gal
First-hour rating
67 gal
UEF
3.5
681 kWh1,741 kWh
Where the Ruud PRO H50 T2 RU310UM (▮) sits among all 510 certified water heaters (electric), by annual kWh

What it costs in every state

Ruud PRO H50 T2 RU310UM: 915 kWh/yr × each state's average residential rate (EIA)
StateRate ¢/kWhThis model $/yrRelative cost
Alabama16.4¢$150
Alaska28.2¢$258
Arizona15.2¢$139
Arkansas14.1¢$129
California34.7¢$318
Colorado17.1¢$157
Connecticut24.3¢$223
Delaware19.3¢$177
District of Columbia24.4¢$223
Florida15.1¢$138
Georgia16.4¢$150
Hawaiipriciest52.7¢$482
Idaho14.4¢$131
Illinois19.9¢$182
Indiana17.5¢$160
Iowa15.9¢$146
Kansas15.7¢$144
Kentucky14.3¢$130
Louisiana13.5¢$123
Maine29.6¢$271
Maryland21.8¢$200
Massachusetts29.6¢$271
Michigan23.0¢$210
Minnesota17.5¢$160
Mississippi14.9¢$136
Missouri16.2¢$148
Montana15.1¢$139
Nebraska13.3¢$121
Nevadacheapest13.1¢$120
New Hampshire27.0¢$247
New Jersey24.9¢$228
New Mexico15.1¢$138
New York29.5¢$270
North Carolina14.7¢$135
North Dakota14.1¢$129
Ohio19.2¢$176
Oklahoma14.3¢$131
Oregon16.3¢$149
Pennsylvania21.7¢$199
Rhode Island29.2¢$267
South Carolina15.6¢$142
South Dakota15.4¢$141
Tennessee14.1¢$129
Texas15.9¢$146
Utah13.4¢$122
Vermont24.4¢$224
Virginia17.2¢$158
Washington14.9¢$136
West Virginia15.4¢$141
Wisconsin19.6¢$179
Wyoming15.2¢$139

Certified models closest in efficiency

electric water heaters within reach of 915 kWh/yr
ModelkWh/yr$/yr (US avg)
A. O. Smith HPACO-45 1**+AXST-50LBTTP 1915$168
A. O. Smith HPACO-45C 1**+AXST-50LBCTTP 1915$168
American MHPCO-45 1**+MXST-50LBTTP 1915$168
Ariston ARIHPWH-40-T915$168
Friedrich PROH50 T2 FD310BM915$168
Friedrich PROH50 T2 FD310UM915$168

Run your own numbers

Your rate, your numbers

Per day
46¢
Per month
$13.98
Per year
$168

915 kWh/yr × 18.3¢/kWh = $168/yr

Prefilled with this model's certified 915 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 PRO H50 T2 RU310UM use?
ENERGY STAR certifies the Ruud PRO H50 T2 RU310UM at 915 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 PRO H50 T2 RU310UM cost to run per month?
About $13.98 a month at the U.S. average residential rate (18.3¢/kWh) — 46¢ a day, or $168 a year. Your state's rate moves this up or down; see the table above.
Is the Ruud PRO H50 T2 RU310UM energy efficient?
It uses 24% less electricity than the median certified electric water heater, placing it in the efficient third of certified models.
What does the Ruud PRO H50 T2 RU310UM cost to run in the cheapest vs. priciest state?
At current residential rates it costs about $120 a year in Nevada (13.1¢/kWh) and $482 in Hawaii (52.7¢/kWh).

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