WattCost

Data through April 2026

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

Lennox WHHP065T45MD240S

For a standard household draw pattern, the Lennox WHHP065T45MD240S uses a certified 1,225 kWh per year: roughly $231 annually at the national average rate. That's close to the middle of the certified pack — about 13% above the median electric water heater, ranked 343 of 566. The same unit costs $151 a year in North Dakota but $571 in Hawaii — electricity rates, not the appliance, make the difference.

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

$231/yr

$121 · cheapest certified water heaters (electric)$328 · priciest
Per month
$19.22
Per day
63¢
Certified use
1,225 kWh/yr
Type
Hybrid/Electric Heat Pump
Heat pump type
240 Volt Integrated HPWH
Storage volume
61 gal
First-hour rating
77 gal
UEF
4.05
643 kWh1,741 kWh
Where the Lennox WHHP065T45MD240S (▮) sits among all 566 certified water heaters (electric), by annual kWh

What it costs in every state

Lennox WHHP065T45MD240S: 1,225 kWh/yr × each state's average residential rate (EIA)
StateRate ¢/kWhThis model $/yrRelative cost
Alabama17.4¢$213
Alaska27.4¢$335
Arizona15.5¢$190
Arkansas14.2¢$173
California35.3¢$432
Colorado16.5¢$203
Connecticut32.2¢$395
Delaware18.8¢$230
District of Columbia25.4¢$311
Florida15.4¢$188
Georgia15.4¢$188
Hawaiipriciest46.6¢$571
Idaho12.7¢$156
Illinois20.5¢$251
Indiana17.9¢$219
Iowa13.9¢$170
Kansas15.8¢$193
Kentucky15.0¢$184
Louisiana14.4¢$177
Maine28.4¢$348
Maryland22.1¢$270
Massachusetts29.4¢$361
Michigan21.4¢$262
Minnesota16.4¢$201
Mississippi16.8¢$205
Missouri14.0¢$172
Montana13.9¢$170
Nebraska13.3¢$163
Nevada14.3¢$175
New Hampshire27.2¢$334
New Jersey23.5¢$288
New Mexico15.2¢$186
New York29.4¢$361
North Carolina16.3¢$199
North Dakotacheapest12.3¢$151
Ohio19.5¢$239
Oklahoma13.3¢$163
Oregon15.8¢$193
Pennsylvania21.5¢$263
Rhode Island28.3¢$347
South Carolina17.1¢$209
South Dakota14.5¢$178
Tennessee14.9¢$183
Texas17.0¢$208
Utah13.3¢$163
Vermont24.6¢$301
Virginia17.4¢$213
Washington14.4¢$176
West Virginia16.1¢$197
Wisconsin19.2¢$235
Wyoming14.7¢$180

Certified models closest in efficiency

electric water heaters within reach of 1,225 kWh/yr
ModelkWh/yr$/yr (US avg)
Ariston ARIHPWH-65-T1,225$231
Rinnai REHP801,225$231
Rinnai REHP80BM1,225$231
Rinnai REHP80C1,225$231
A. O. Smith HPS10-66H45DV 21,233$232
A. O. Smith HPSN10-66H45DV 21,233$232

Run your own numbers

Your rate, your numbers

Per day
63¢
Per month
$19.22
Per year
$231

1,225 kWh/yr × 18.8¢/kWh = $231/yr

Prefilled with this model's certified 1,225 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 Lennox WHHP065T45MD240S use?
ENERGY STAR certifies the Lennox WHHP065T45MD240S at 1,225 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 Lennox WHHP065T45MD240S cost to run per month?
About $19.22 a month at the U.S. average residential rate (18.8¢/kWh) — 63¢ a day, or $231 a year. Your state's rate moves this up or down; see the table above.
Is the Lennox WHHP065T45MD240S energy efficient?
It uses 13% more electricity than the median certified electric water heater.
What does the Lennox WHHP065T45MD240S cost to run in the cheapest vs. priciest state?
At current residential rates it costs about $151 a year in North Dakota (12.3¢/kWh) and $571 in Hawaii (46.6¢/kWh).

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