WattCost

Data through April 2026

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

A. O. Smith HPTU-66N 1

For a standard household draw pattern, the A. O. Smith HPTU-66N 1 uses a certified 1,381 kWh per year: roughly $260 annually at the national average rate. Even among certified models it's on the thirsty end: 28% more electricity than the median electric water heater, ranked 488 of 566. Where you live moves the bill from $171 a year in North Dakota to $644 in Hawaii.

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

$260/yr

$121 · cheapest certified water heaters (electric)$328 · priciest
Per month
$21.67
Per day
71¢
Certified use
1,381 kWh/yr
Type
Hybrid/Electric Heat Pump
Heat pump type
240 Volt Integrated HPWH
Storage volume
67 gal
First-hour rating
79 gal
UEF
3.45
643 kWh1,741 kWh
Where the A. O. Smith HPTU-66N 1 (▮) sits among all 566 certified water heaters (electric), by annual kWh

What it costs in every state

A. O. Smith HPTU-66N 1: 1,381 kWh/yr × each state's average residential rate (EIA)
StateRate ¢/kWhThis model $/yrRelative cost
Alabama17.4¢$240
Alaska27.4¢$378
Arizona15.5¢$214
Arkansas14.2¢$196
California35.3¢$487
Colorado16.5¢$228
Connecticut32.2¢$445
Delaware18.8¢$259
District of Columbia25.4¢$351
Florida15.4¢$212
Georgia15.4¢$212
Hawaiipriciest46.6¢$644
Idaho12.7¢$175
Illinois20.5¢$283
Indiana17.9¢$247
Iowa13.9¢$191
Kansas15.8¢$218
Kentucky15.0¢$207
Louisiana14.4¢$199
Maine28.4¢$392
Maryland22.1¢$305
Massachusetts29.4¢$407
Michigan21.4¢$295
Minnesota16.4¢$226
Mississippi16.8¢$231
Missouri14.0¢$193
Montana13.9¢$192
Nebraska13.3¢$183
Nevada14.3¢$197
New Hampshire27.2¢$376
New Jersey23.5¢$325
New Mexico15.2¢$209
New York29.4¢$407
North Carolina16.3¢$224
North Dakotacheapest12.3¢$171
Ohio19.5¢$269
Oklahoma13.3¢$184
Oregon15.8¢$218
Pennsylvania21.5¢$297
Rhode Island28.3¢$391
South Carolina17.1¢$236
South Dakota14.5¢$201
Tennessee14.9¢$206
Texas17.0¢$235
Utah13.3¢$184
Vermont24.6¢$339
Virginia17.4¢$240
Washington14.4¢$198
West Virginia16.1¢$222
Wisconsin19.2¢$265
Wyoming14.7¢$203

Certified models closest in efficiency

electric water heaters within reach of 1,381 kWh/yr
ModelkWh/yr$/yr (US avg)
A. O. Smith HPTU-66CTA 11,381$260
A. O. Smith HPTU-66DR 11,381$260
American HPHE10266H045DVCTA-11,381$260
American HPHE10266H045DVDR 11,381$260
American HPHE10266H045DVN 11,381$260
Lochinvar HPA068KD 11,381$260

Run your own numbers

Your rate, your numbers

Per day
71¢
Per month
$21.67
Per year
$260

1,381 kWh/yr × 18.8¢/kWh = $260/yr

Prefilled with this model's certified 1,381 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 A. O. Smith HPTU-66N 1 use?
ENERGY STAR certifies the A. O. Smith HPTU-66N 1 at 1,381 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 A. O. Smith HPTU-66N 1 cost to run per month?
About $21.67 a month at the U.S. average residential rate (18.8¢/kWh) — 71¢ a day, or $260 a year. Your state's rate moves this up or down; see the table above.
Is the A. O. Smith HPTU-66N 1 energy efficient?
It uses 28% more electricity than the median certified electric water heater, which puts it among the least efficient certified models.
What does the A. O. Smith HPTU-66N 1 cost to run in the cheapest vs. priciest state?
At current residential rates it costs about $171 a year in North Dakota (12.3¢/kWh) and $644 in Hawaii (46.6¢/kWh).

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