WattCost

Data through June 2026

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

AMERICAN STANDARD WATER HEATERS ASHPWH-40

For a standard household draw pattern, the AMERICAN STANDARD WATER HEATERS ASHPWH-40 uses a certified 907 kWh per year: roughly $166 annually at the national average rate. That's 25% less than the median certified electric water heater, placing it comfortably in the efficient third of the field (137 of 510). The same unit costs $119 a year in Nevada but $478 in Hawaii — electricity rates, not the appliance, make the difference.

Dimensions 37.6" H × 18.2" W

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

$166/yr

$125 · cheapest certified water heaters (electric)$319 · priciest
Per month
$13.86
Per day
46¢
Certified use
907 kWh/yr
Type
Hybrid/Electric Heat Pump
Heat pump type
240 Volt Integrated HPWH
Storage volume
37 gal
First-hour rating
66 gal
UEF
3.58
681 kWh1,741 kWh
Where the AMERICAN STANDARD WATER HEATERS ASHPWH-40 (▮) sits among all 510 certified water heaters (electric), by annual kWh

What it costs in every state

AMERICAN STANDARD WATER HEATERS ASHPWH-40: 907 kWh/yr × each state's average residential rate (EIA)
StateRate ¢/kWhThis model $/yrRelative cost
Alabama16.4¢$149
Alaska28.2¢$256
Arizona15.2¢$138
Arkansas14.1¢$128
California34.7¢$315
Colorado17.1¢$155
Connecticut24.3¢$221
Delaware19.3¢$175
District of Columbia24.4¢$221
Florida15.1¢$137
Georgia16.4¢$148
Hawaiipriciest52.7¢$478
Idaho14.4¢$130
Illinois19.9¢$180
Indiana17.5¢$159
Iowa15.9¢$144
Kansas15.7¢$142
Kentucky14.3¢$129
Louisiana13.5¢$122
Maine29.6¢$268
Maryland21.8¢$198
Massachusetts29.6¢$269
Michigan23.0¢$209
Minnesota17.5¢$159
Mississippi14.9¢$135
Missouri16.2¢$147
Montana15.1¢$137
Nebraska13.3¢$120
Nevadacheapest13.1¢$119
New Hampshire27.0¢$245
New Jersey24.9¢$226
New Mexico15.1¢$137
New York29.5¢$267
North Carolina14.7¢$134
North Dakota14.1¢$128
Ohio19.2¢$174
Oklahoma14.3¢$130
Oregon16.3¢$148
Pennsylvania21.7¢$197
Rhode Island29.2¢$265
South Carolina15.6¢$141
South Dakota15.4¢$139
Tennessee14.1¢$128
Texas15.9¢$145
Utah13.4¢$121
Vermont24.4¢$222
Virginia17.2¢$156
Washington14.9¢$135
West Virginia15.4¢$140
Wisconsin19.6¢$177
Wyoming15.2¢$138

Certified models closest in efficiency

electric water heaters within reach of 907 kWh/yr
ModelkWh/yr$/yr (US avg)
Ariston ARIHPWH-40907$166
A. O. Smith CAHP-40 2902$165
A. O. Smith HP1050H45DV 1902$165
A. O. Smith HP1050H45DVCTA-1902$165
A. O. Smith HPA10-40H45DV 2902$165
A. O. Smith HPTA-40 2902$165

Run your own numbers

Your rate, your numbers

Per day
46¢
Per month
$13.86
Per year
$166

907 kWh/yr × 18.3¢/kWh = $166/yr

Prefilled with this model's certified 907 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 AMERICAN STANDARD WATER HEATERS ASHPWH-40 use?
ENERGY STAR certifies the AMERICAN STANDARD WATER HEATERS ASHPWH-40 at 907 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 AMERICAN STANDARD WATER HEATERS ASHPWH-40 cost to run per month?
About $13.86 a month at the U.S. average residential rate (18.3¢/kWh) — 46¢ a day, or $166 a year. Your state's rate moves this up or down; see the table above.
Is the AMERICAN STANDARD WATER HEATERS ASHPWH-40 energy efficient?
It uses 25% less electricity than the median certified electric water heater, placing it in the efficient third of certified models.
What does the AMERICAN STANDARD WATER HEATERS ASHPWH-40 cost to run in the cheapest vs. priciest state?
At current residential rates it costs about $119 a year in Nevada (13.1¢/kWh) and $478 in Hawaii (52.7¢/kWh).

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