WattCost

Data through April 2026

Running cost · Dehumidifiers · ENERGY STAR certified

Aprilaire E100

The Aprilaire E100 is certified at 821 kWh per year, roughly $155 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 139% more than the median dehumidifier (rank 472 of 481) — so the state you live in matters more than usual. The same unit costs $101 a year in North Dakota but $383 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 18.8¢/kWh

$155/yr

$20 · cheapest certified dehumidifiers$529 · priciest
Per month
$12.88
Per day
42¢
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 481 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
Alabama17.4¢$143
Alaska27.4¢$225
Arizona15.5¢$127
Arkansas14.2¢$116
California35.3¢$289
Colorado16.5¢$136
Connecticut32.2¢$265
Delaware18.8¢$154
District of Columbia25.4¢$209
Florida15.4¢$126
Georgia15.4¢$126
Hawaiipriciest46.6¢$383
Idaho12.7¢$104
Illinois20.5¢$168
Indiana17.9¢$147
Iowa13.9¢$114
Kansas15.8¢$130
Kentucky15.0¢$123
Louisiana14.4¢$119
Maine28.4¢$233
Maryland22.1¢$181
Massachusetts29.4¢$242
Michigan21.4¢$176
Minnesota16.4¢$135
Mississippi16.8¢$138
Missouri14.0¢$115
Montana13.9¢$114
Nebraska13.3¢$109
Nevada14.3¢$117
New Hampshire27.2¢$224
New Jersey23.5¢$193
New Mexico15.2¢$124
New York29.4¢$242
North Carolina16.3¢$133
North Dakotacheapest12.3¢$101
Ohio19.5¢$160
Oklahoma13.3¢$109
Oregon15.8¢$130
Pennsylvania21.5¢$176
Rhode Island28.3¢$232
South Carolina17.1¢$140
South Dakota14.5¢$119
Tennessee14.9¢$123
Texas17.0¢$139
Utah13.3¢$109
Vermont24.6¢$202
Virginia17.4¢$143
Washington14.4¢$118
West Virginia16.1¢$132
Wisconsin19.2¢$158
Wyoming14.7¢$121

Certified models closest in efficiency

dehumidifiers within reach of 821 kWh/yr
ModelkWh/yr$/yr (US avg)
Santa Fe 4047300most efficient842$159
Wellsle YDL24Pmost efficient791$149
COSTWAY ES10429US-WH779$147
DEVERSE D025H-25Pt3886$167
Aprilaire E130most efficient926$174
Aprilaire E080most efficient632$119

Run your own numbers

Your rate, your numbers

Per day
42¢
Per month
$12.88
Per year
$155

821 kWh/yr × 18.8¢/kWh = $155/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 $12.88 a month at the U.S. average residential rate (18.8¢/kWh) — 42¢ a day, or $155 a year. Your state's rate moves this up or down; see the table above.
Is the Aprilaire E100 energy efficient?
It uses 139% 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 $101 a year in North Dakota (12.3¢/kWh) and $383 in Hawaii (46.6¢/kWh).

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