WattCost

Data through June 2026

Running cost · Dehumidifiers · ENERGY STAR certified

Aprilaire E100

The Aprilaire E100 is certified at 821 kWh per year, roughly $151 at the national average — though seasonal use means your real bill lands in a few months, not twelve. It sits near the bottom of the certified table — using 143% more than the median dehumidifier (rank 510 of 519) — so the state you live in matters more than usual. The same unit costs $108 a year in Nevada but $433 in Hawaii — electricity rates, not the appliance, make the difference. It also meets ENERGY STAR's stricter “Most Efficient” criteria.

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

$151/yr

$19 · cheapest certified dehumidifiers$515 · priciest
Per month
$12.55
Per day
41¢
Certified use
821 kWh/yr
Type
Whole-home Dehumidifier
Capacity
85 pints/day
Efficiency (IEF)
2.35 L/kWh
105 kWh2,808 kWh
Where the Aprilaire E100 (▮) sits among all 519 certified dehumidifiers, by annual kWh

What it costs in every state

Aprilaire E100: 821 kWh/yr × each state's average residential rate (EIA)
StateRate ¢/kWhThis model $/yrRelative cost
Alabama16.4¢$135
Alaska28.2¢$232
Arizona15.2¢$125
Arkansas14.1¢$116
California34.7¢$285
Colorado17.1¢$141
Connecticut24.3¢$200
Delaware19.3¢$158
District of Columbia24.4¢$200
Florida15.1¢$124
Georgia16.4¢$134
Hawaiipriciest52.7¢$433
Idaho14.4¢$118
Illinois19.9¢$163
Indiana17.5¢$144
Iowa15.9¢$131
Kansas15.7¢$129
Kentucky14.3¢$117
Louisiana13.5¢$111
Maine29.6¢$243
Maryland21.8¢$179
Massachusetts29.6¢$243
Michigan23.0¢$189
Minnesota17.5¢$144
Mississippi14.9¢$122
Missouri16.2¢$133
Montana15.1¢$124
Nebraska13.3¢$109
Nevadacheapest13.1¢$108
New Hampshire27.0¢$222
New Jersey24.9¢$205
New Mexico15.1¢$124
New York29.5¢$242
North Carolina14.7¢$121
North Dakota14.1¢$116
Ohio19.2¢$158
Oklahoma14.3¢$118
Oregon16.3¢$134
Pennsylvania21.7¢$178
Rhode Island29.2¢$240
South Carolina15.6¢$128
South Dakota15.4¢$126
Tennessee14.1¢$116
Texas15.9¢$131
Utah13.4¢$110
Vermont24.4¢$201
Virginia17.2¢$141
Washington14.9¢$122
West Virginia15.4¢$127
Wisconsin19.6¢$161
Wyoming15.2¢$125

Certified models closest in efficiency

dehumidifiers within reach of 821 kWh/yr
ModelkWh/yr$/yr (US avg)
Santa Fe 4047300most efficient842$154
Wellsle YDL24Pmost efficient791$145
COSTWAY ES10429US-WH779$143
DEVERSE D025H-25Pt3886$162
Aprilaire E130most efficient926$170
Aprilaire E080most efficient632$116

Run your own numbers

Your rate, your numbers

Per day
41¢
Per month
$12.55
Per year
$151

821 kWh/yr × 18.3¢/kWh = $151/yr

Prefilled with this model's certified 821 kWh/yr — adjust if your usage differs from the DOE test basis. The certified annual kWh comes from the DOE test basis for standardized annual runtime. Damp basements that run a unit year-round will exceed it; seasonal use will come in under.

Questions, answered with the data

How much electricity does the Aprilaire E100 use?
ENERGY STAR certifies the Aprilaire E100 at 821 kWh per year. The certified annual kWh comes from the DOE test basis for standardized annual runtime. Damp basements that run a unit year-round will exceed it; seasonal use will come in under.
How much does the Aprilaire E100 cost to run per month?
About $12.55 a month at the U.S. average residential rate (18.3¢/kWh) — 41¢ a day, or $151 a year. Your state's rate moves this up or down; see the table above.
Is the Aprilaire E100 energy efficient?
It uses 143% more electricity than the median certified dehumidifier, which puts it among the least efficient certified models. It also meets ENERGY STAR's Most Efficient criteria.
What does the Aprilaire E100 cost to run in the cheapest vs. priciest state?
At current residential rates it costs about $108 a year in Nevada (13.1¢/kWh) and $433 in Hawaii (52.7¢/kWh).

Keep digging