Whirlpool WHHD501AW dehumidifier: specs and cost to run

Our read

Who it suits

At 50 pints a day, the WHHD501AW fits every space in the ENERGY STAR table, wet ones over 2,000 sq ft included. Its yearly energy use sits near the median, so weigh drainage, noise, and price.

By Julien Fourel · How we compare

Updated Oct 16, 2026

50 pints a day

Where that fits on the ENERGY STAR sizing table

How damp the space is	Under 2,000 sq ft	Over 2,000 sq ft
DampSmells musty now and then50–75% RH	Room to spare20–30 pints suggested	Fits30+ pints suggested
Very dampDamp spots on walls or floor75–90% RH	Room to spare25–40 pints suggested	Fits40+ pints suggested
WetWalls sweat or water seeps in90–100% RH	Fits30–50 pints suggested	Fits50+ pints suggested

Capacity suggested for each case, read Oct 5, 2026. ENERGY STAR adds that it’s better to oversize than undersize.

Running cost

A middle-of-the-pack power bill

Next to the median 45–50 pint model, this one costs $20 more to run in the United States over 11 years. That’s how long the DOE expects a portable to last. The thriftiest 45–50 pint model, the Aeocky LEO PRO-RCS50(Y)-N4-3(B)-25, would save $185 over those years.

How long dehumidifiers last

Wi-Fi app

You’ll check it in person

Like 141 other 45–50 pint models out of 156, the WHHD501AW has no Wi-Fi app on the EPA list. In a basement you rarely visit, plan to check it in person.

Crawl space dehumidifier guide

Ask before you buy

Ask about the pump, and about the cold

Pump and cold are the two blanks for the WHHD501AW in our sources. A pump matters when water can’t run down to a floor drain. Cold matters because below 65°F, ENERGY STAR says frost can form on the coils.

Plan the drain

From the data

Where it stands

Uses 530 kWh a year, 10 kWh over the median of its class.
Its refrigerant is R-32, flagged as lower GWP.Global warming potential 675.
Of the 156 certified 45–50 pint portables, 135 use less energy, and 20 use exactly as much.
At 2.01 liters per kWh, it clears the federal minimum for its class by 26%.The DOE sets 1.60 L/kWh for portables rated over 25 and up to 50 pints a day. Every unit made since June 13, 2019, must meet it.
Whirlpool’s next size down is the WHAD321AW, rated 32 pints.That one uses 187 kWh a year less.
Sold since September 2025. Among 45–50 pint models, 38 of 156 came out earlier.
Not on the EPA’s Most Efficient list, which names 8 of the 45–50 pint models.
The company that files it also files the Amana and Keystone models with the EPA.
Another brand near this size: the Yoau UDZ1-150P, at 50 pints and 475 kWh a year.In the United States, this one costs $10 a year more to run.

Our arithmetic

One full day of drying

Water

6.3gal

50 pints

Electricity

11.8kWh

liters ÷ IEF

Cost

$2.16

in the United States

A day of nonstop drying means 50 pints of water, about 6.3 gallons, for some 11.8 kWh. At the average home electricity price in the United States, the WHHD501AW costs $2.16 to run that day.

The EPA’s yearly estimate, 530 kWh, adds up to about 45 days like that. Each extra day at full output costs another $2.16.

Those 50 pints come from a DOE test at 65°F and 60% humidity. Cooler air at that humidity gives up less water, so expect fewer pints in a cold basement.

Every day at full output leaves 6.3 gallons to get rid of. Check how the WHHD501AW drains, since our sources don’t say.

Plan the drain

Running cost

Cost in your state

Your state

530 kWh a year × the home electricity price of each state.

Prices: EIA, Electric Power Monthly, Table 5.6.A, July 2026. Lowest and highest of the 50 states and DC shown.
State	Price	Per year
Louisiana (lowest)	12.72¢	$67
U.S. average	18.31¢	$97
U.S. average	18.31¢	$97
California	33.61¢	$178
Hawaii (highest)	48.00¢	$254

All 50 states and DC

Same EPA figures

1 other Whirlpool model number

The EPA lists the same capacity, 50 pints, and the same energy use, 530 kWh, for this model. Color, pump, or app may differ, so check each page.

WHHD501PAW

Safety

Recalls

No CPSC recall names this model.Checked Oct 4, 2026.

No CPSC dehumidifier recall names Almo.

Every number has a source

Where the numbers come from

U.S. EPAOct 15, 2026

Capacity, energy use, refrigerant, filing company, certification.

Record 4499033 · certified Sep 16, 2025

U.S. Energy Information AdministrationJuly 2026

Home electricity price in each state.

Electric Power Monthly, Table 5.6.A

Code of Federal RegulationsOct 7, 2026

Federal minimum efficiency for each size of dehumidifier.

10 CFR 430.32(v), as of Jan 1, 2025

Consumer Product Safety CommissionOct 4, 2026

Recalls of dehumidifiers.

No recall naming this company

Not published by these sources

Pump and pump lift
Noise, dB(A)
Bucket size
Lowest working temperature
Dimensions
Warranty

Found a number that looks wrong?Report it

Full spec sheet

All the details

How much water it removes2 of 3 published

Water removed a dayDOE 2019 test (Appendix X1): 50 pints EPA
Type: Portable EPA
Room size covered: Not published

Drainage0 of 4 published

Bucket size: Not published
Drain hose connection: Not published
Built-in pump: Not published
Pump lift: Not published

Running cost3 of 3 published

Energy useEPA yearly estimate: 530 kWh/yr EPA
Integrated energy factor (IEF)Liters removed per kWh. Higher is better: 2.01 L/kWh EPA
Cost a year in the United States: $97 EPA × EIA

Noise0 of 1 published

Noise level, dB(A): Not published

Build and warranty2 of 6 published

Refrigerant: R-32, 5.5 oz EPA
Wi-Fi app: No EPA
Lowest working temperature: Not published
Dimensions: Not published
Weight: Not published
Warranty: Not published

Certification and filing5 of 5 published

ENERGY STAR® certified: Sep 16, 2025 EPA
On the market since: Sep 1, 2025 EPA
Filed byCompany that filed the model with the EPA: Almo EPA
Sold in: United States, Canada EPA
UPC: 819430020768 EPA

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Whirlpool WHHD501AW

Who it suits

Where that fits on the ENERGY STAR sizing table

A middle-of-the-pack power bill

You’ll check it in person

Ask about the pump, and about the cold

Where it stands

One full day of drying

Cost in your state

1 other Whirlpool model number

Recalls

Where the numbers come from

All the details

Similar 50-pint models

Aegis HP150

Defender HP150

Defender M145

Guides that cover this model

Search