WatchDog550

Dehumidifier

DOE certified water removal

34.13pints/day2019 DOE test

IEF 1.97 L/kWh

DOE class: 25 to 50 pints/day

DOE data as of 2026-11-03DOE record

DOE capacity class The 2019 DOE test

WatchDog 550: certified to DOE at 34.13 pints/day under the 2019 DOE test, IEF 1.97 L/kWh. DOE data as of 2026-11-03.

Every model number on this record

Filed with DOE under basic model 550. A listing with any of these numbers is this unit.

Every model number filed under basic model 550, DOE data as of 2026-11-03
Model numberFiled by
550 (DOE basic model)WatchDog

How much does the WatchDog 550 cost to run?

About $1.49 a day, or $44.66 for 30 days, running nonstop at DOE's test conditions (less on days it cycles off at its humidity setting).

34.13 pints/day is 16.15 liters. At an IEF of 1.97 L/kWh that takes 8.2 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 8¢.

How does the WatchDog 550 rank in its DOE class?

In its DOE class (portable dehumidifiers, 25 to 50 pints/day), 73 models have a matched Amazon listing. 50 of them have a higher IEF than its 1.97, which is 2% below their median of 2.01.

DOE's minimum for this class is an IEF of 1.60 L/kWh for units made since June 13, 2019. At 1.97, this one files 23% above that floor. 3 of the 296 in the class file exactly the minimum. Source: 10 CFR 430.32(v)(2).

Dehumidifiers certified at 25 to 50 pints a day (2019 test), 73 with a listing

Among 296 portable dehumidifiers, 25 to 50 pints/day

Water removal (pints/day)34.13

Higher than 18 of 296.

25.0650 pints/day

Efficiency (IEF, L/kWh)1.97

Higher than 157 of 296.

1.62.21

Three to compare with

From models with a matched listing.

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

    ARECOVAS EE25000533.62 pints/day

    DOE class 25 to 50 pints/day, IEF 2.15: about 8% less power for the same water removal.

  • Nearest size in its class with a higher IEF

    Glowells PD120A35 pints/day

    DOE class 25 to 50 pints/day, IEF 2.01.

  • Nearest bigger unit

    Moiswell Aegis HP11038 pints/day

    DOE class 25 to 50 pints/day, IEF 2.01.

DOE record

Capacity

Water removal
34.13 pints/day
Efficiency (IEF)
1.97 L/kWh

Record

DOE basic model
550
DOE class
Portable dehumidifiers with a capacity greater than 25 pints per day and less than or equal to 50 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 WatchDog 550 really remove?
34.13 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 WatchDog 550 cost to run for 24 hours?
About $1.49 for 24 hours nonstop at DOE's test conditions: 8.2 kWh at 18.16¢/kWh, the US residential average for August 2026 (EIA).