MountmanMM-OL09-D031GGN2B1/E

Dehumidifier

DOE certified water removal

9pints/day2019 DOE test

IEF 1.92 L/kWh

DOE class: up to 25 pints/day

DOE data as of 2026-11-03DOE record

DOE capacity class The 2019 DOE test

Mountman MM-OL09-D031GGN2B1/E: certified to DOE at 9 pints/day under the 2019 DOE test, IEF 1.92 L/kWh. DOE data as of 2026-11-03.

Every model number on this record

Filed with DOE under basic model MM-OL09-D031GGN2B1/E. A listing with any of these numbers is this unit.

Every model number filed under basic model MM-OL09-D031GGN2B1/E, DOE data as of 2026-11-03
Model numberFiled by
MM-OL09-D031GGN2B1/E (DOE basic model)Mountman

How much does the Mountman MM-OL09-D031GGN2B1/E cost to run?

About 40¢ a day, or $12.08 for 30 days, running nonstop at DOE's test conditions (less on days it cycles off at its humidity setting).

9 pints/day is 4.26 liters. At an IEF of 1.92 L/kWh that takes 2.22 kWh a day running nonstop at DOE's test conditions. Electricity at 18.16¢/kWh, the US residential average for August 2026 (EIA Electric Power Monthly, table 5.6.A). Each 1¢/kWh you pay above or below 18.16¢ moves the daily figure by 2¢.

How does the Mountman MM-OL09-D031GGN2B1/E rank in its DOE class?

In its DOE class (portable dehumidifiers up to 25 pints/day), 78 models have a matched Amazon listing, not counting 1 filing flagged as unusual. 2 of them have a higher IEF than its 1.92, which is 11% above their median of 1.73. On cost, removing the same 9 pints a day at their median IEF would cost $13.45 for 30 days running nonstop, $1.37 more than this one.

DOE's minimum for this class is an IEF of 1.30 L/kWh for units made since June 13, 2019. At 1.92, this one files 48% above that floor. 63 of the 253 in the class file exactly the minimum. Source: 10 CFR 430.32(v)(2).

Small dehumidifiers: up to 25 pints a day (2019 test), 79 with a listing

Among 253 portable dehumidifiers up to 25 pints/day

Not counting 1 flagged filing far outside the class.

Water removal (pints/day)9

Higher than 58 of 253. 16 others share 9.

4.9524.99 pints/day

Efficiency (IEF, L/kWh)1.92

Higher than 237 of 253. 12 others share 1.92.

1.32.05

Three to compare with

From models with a matched listing.

  • Within 3 pints/day of its size, highest IEF

    KEGIAN HY9DE0039 pints/day

    DOE class up to 25 pints/day, IEF 1.92.

  • Nearest size in its class with a higher IEF

    Auseo OL25-D022CCN3B1/E24.27 pints/day

    DOE class up to 25 pints/day, IEF 2.04: about 6% less power for the same water removal.

  • Nearest bigger unit

    ANDTE PD50K15.5 pints/day

    DOE class up to 25 pints/day, IEF 1.75.

DOE record

Capacity

Water removal
9 pints/day
Efficiency (IEF)
1.92 L/kWh

Record

DOE basic model
MM-OL09-D031GGN2B1/E
DOE class
Portable dehumidifiers with a capacity less than or equal to 25 pints per day
Brands on the filings
1
In DOE's list since
2026-11-02first snapshot we hold

Questions

How many pints a day does the Mountman MM-OL09-D031GGN2B1/E really remove?
9 pints/day, as certified to DOE under the 2019 test (65°F, 60% humidity). The older test ran at 80°F, so a rating from it reads higher for the same unit: the 2019 test explained.
How much does the Mountman MM-OL09-D031GGN2B1/E cost to run for 24 hours?
About 40¢ for 24 hours nonstop at DOE's test conditions: 2.22 kWh at 18.16¢/kWh, the US residential average for August 2026 (EIA).