Moiswell Defender M145 dehumidifier: specs and cost to run

Our read

Who it suits

On the ENERGY STAR table, the Defender M145 suits every space, 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

Its power bill is close to the norm

A portable lasts 11 years on average, by the DOE’s count. In that time, this model costs $20 more to run in the United States than the median 45–50 pint model. 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 Defender M145 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

Our sources don’t say whether the Defender M145 has a pump, or how cold it can run. With no drain lower than the unit, the pump lift must reach your sink. Under 65°F, ENERGY STAR says the coils can frost.

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.
Tied for 136th of 156 certified 45–50 pint portables for low energy use.
Its efficiency, 2.02 liters per kWh, is 26% above the federal minimum for its capacity class.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.
Moiswell’s next size down is the Aegis HP110, rated 38 pints.That one uses 156 kWh a year less.
Sold since January 2026. Among 45–50 pint models, 110 of 156 came out earlier.
Not on the EPA’s Most Efficient list, which names 8 of the 45–50 pint models.
The nearest size from another brand is the Airzentti ACD155P-PG100, rated 50 pints and 530 kWh a year.Both cost the same to run in the United States.

Our arithmetic

One full day of drying

Water

6.2gal

49.83 pints

Electricity

11.7kWh

liters ÷ IEF

Cost

$2.14

in the United States

In 24 hours at full output, the Defender M145 pulls about 6.2 gallons of water from the air and uses about 11.7 kWh. That day costs $2.14 in the United States.

About 45 such days make up the EPA’s yearly estimate of 530 kWh. If yours runs at full output more often, every extra day adds $2.14.

Its rating comes from a DOE test at 65°F and 60% humidity. In cooler air at that humidity, the Defender M145 pulls out less than 49.83 pints a day.

Those 6.2 gallons need a way out: a hose to a drain, a pump, or a bucket you empty. Our sources don’t say which ones the Defender M145 has.

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

5 other Moiswell model numbers

The EPA lists the same capacity, 49.83 pints, and the same energy use, 530 kWh, for these models. Color, pump, or app may differ, so check each page.

Defender HP150 Defender M70 Defender MP70Defender H150Defender MP145

Safety

Recalls

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

No CPSC dehumidifier recall names Shenzhen Yinfeng.

Every number has a source

Where the numbers come from

U.S. EPAOct 15, 2026

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

Record 4520477 · certified Jan 13, 2026

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): 49.83 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: 2.02 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, 10.4 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: Jan 13, 2026 EPA
On the market since: Jan 13, 2026 EPA
Filed byCompany that filed the model with the EPA: Shenzhen Yinfeng Innovation Technology EPA
Sold in: United States, Canada EPA
UPC: 644197712669 EPA

Compare

Similar 50-pint models

Certified portables of the same size with a full page, closest in yearly energy use.

Moiswell

Aegis HP150

Capacity

50 pints

Cost a year in the United States

$97

Pump

Not published

Noise

Not published

ENERGY STAR® certified

Moiswell

Defender HP150

Capacity

50 pints

Cost a year in the United States

$97

Pump

Not published

Noise

Not published

ENERGY STAR® certified

Moiswell

Defender M70

Capacity

50 pints

Cost a year in the United States

$97

Pump

Not published

Noise

Not published

ENERGY STAR® certified

Guides

Guides and a brand comparison

Each guide compares the certified models of this size for one need. Moiswell vs AlorAir sets the two brands side by side.

Basement dehumidifierOne of our picks Crawl space dehumidifierOne of our picks Moiswell vs AlorAirBrand comparisonComparison Dehumidifier with pumpOne of our picks

Most searched guides

Tools

Moiswell Defender M145

Who it suits

Where that fits on the ENERGY STAR sizing table

Its power bill is close to the norm

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

5 other Moiswell model numbers

Recalls

Where the numbers come from

All the details

Similar 50-pint models

Aegis HP150

Defender HP150

Defender M70

Guides and a brand comparison

Search