ModelPortable
Portable dehumidifier, 9 pints a day
Water removed a day
9pints
9 pints/day, DOE 2019 test · EPA
Cost a year in the United States
$19
Pumps water out?
Not published
Ask for the pump lift
How loud?
Not published
Ask for a dB(A) figure
Energy use
105kWh/yr
Refrigerant
R-290
Check before you buy. Pump, noise, and warranty aren’t in our sources, so ask the seller.
Our read
At 9 pints a day, the MM-HY9DE003 sits below the smallest size in the ENERGY STAR table. That size is 20 pints, for a damp room under 2,000 sq ft. It’s one of the cheaper models of its size to run.
9 pints a day
| How damp the space is | Under 2,000 sq ft | Over 2,000 sq ft |
|---|---|---|
| DampSmells musty now and then50–75% RH | Too small20–30 pints suggested | Too small30+ pints suggested |
| Very dampDamp spots on walls or floor75–90% RH | Too small25–40 pints suggested | Too small40+ pints suggested |
| WetWalls sweat or water seeps in90–100% RH | Too small30–50 pints suggested | Too small50+ pints suggested |
Capacity suggested for each case, read Oct 5, 2026. ENERGY STAR adds that it’s better to oversize than undersize.
Running cost
It uses 12 kWh a year less than the median 13-pint and smaller model. Over 11 years, the DOE’s average life for a portable, that’s about $24 saved in the United States.
How long dehumidifiers lastSame figures, other brand
The company that files it with the EPA lists four models under other brands with the same capacity, energy use, and efficiency. Among them are the Kegian KE-HY9DE003, Kegian KE-HY9DE003-W, and Uthfy HY9DE003. Compare their prices and warranties before you choose.
Ask before you buy
No source we use gives a dB(A) figure for the MM-HY9DE003. For a bedroom or an office, ask the seller for one, and for the distance it was measured from.
Quiet dehumidifier guideFrom the data
Our arithmetic
Water
1.1gal
9 pints
Electricity
2.2kWh
liters ÷ IEF
Cost
$0.40
in the United States
Run for a whole day at its rating, the MM-HY9DE003 removes 9 pints, about 1.1 gallons, on roughly 2.2 kWh. In the United States, that’s $0.40.
Divide the EPA’s 105 kWh a year by one full day’s use, and you get roughly 48 days. Past that, each day at full output adds $0.40 to the bill.
The DOE test behind those 9 pints runs at 65°F and 60% humidity. At the same humidity, a cooler basement gets less water out of the MM-HY9DE003.
Without a hose or a pump, someone has to carry out 1.1 gallons a day. Our sources don’t say whether the MM-HY9DE003 has a bucket, or how much it holds.
Running cost
105 kWh a year × the home electricity price of each state.
| State | Price | Relative cost | Per year |
|---|---|---|---|
| Louisiana (lowest) | 12.72¢ | $13 | |
| U.S. averageYour state | 18.31¢ | $19 | |
| U.S. average | 18.31¢ | $19 | |
| California | 33.61¢ | $35 | |
| Hawaii (highest) | 48.00¢ | $50 |
Same EPA figures
The EPA lists the same capacity, 9 pints, and the same energy use, 105 kWh, for this model. Color, pump, or app may differ, so check each page.
Safety
No CPSC recall names this model.Checked Oct 4, 2026.
No CPSC dehumidifier recall names Ningbo Heyu Trade.
Every number has a source
U.S. EPAOct 15, 2026
Capacity, energy use, refrigerant, filing company, certification.
Record 4714834 · certified Oct 10, 2026U.S. Energy Information AdministrationJuly 2026
Home electricity price in each state.
Electric Power Monthly, Table 5.6.ACode of Federal RegulationsOct 7, 2026
Federal minimum efficiency for each size of dehumidifier.
10 CFR 430.32(v), as of Jan 1, 2025Consumer Product Safety CommissionOct 4, 2026
Recalls of dehumidifiers.
No recall naming this companyNot published by these sources
Found a number that looks wrong?Report it
Full spec sheet
Compare
Certified portables of the same size with a full page, closest in yearly energy use.