Data studyNo hands-on testing

How Often Will You Actually Empty It? Tank Size vs Capacity

Name: Dehumidifier Days Between Empties (Data Study)
Creator: PickGrade
Published: 2026-07-11
License: https://creativecommons.org/licenses/by/4.0/

By Eran Yorkovsky · July 11, 2026 · Last updated July 11, 2026

Data study · dehumidifiers

The spec sheet tells you how much water a dehumidifier removes. It never tells you how often you'll carry it to a sink. We divided tank size by daily capacity to find out — and the spread is nearly eightfold.

Days between empties (days)

Higher = better

Midea Cube 20

1.28 days

Midea Cube 50 (with pump)

0.67 days

Frigidaire FHDD5034Y1

0.43 days

Ivation IVADDH06 (desiccant)

0.32 days

Waykar 34-Pint

0.16 days

The Midea Cube 20 runs more than a full day between empties. The Waykar 34 fills in under four hours at its rated output.

The spread is nearly 8× — the single biggest difference in day-to-day hassle in this category, and almost nobody publishes it.

The Cube 50 holds more water than the Frigidaire while removing more of it, which is what the collapsible reservoir is actually for.

Run a drain hose and none of this matters. It only matters when the hose can't run downhill — and then what you want isn't a bigger tank, it's a pump.

#	Product	Days between empties	numerator	capacity	price	score	Tier
1	Midea Cube 20	1.28	25.6	20.0	$200	8.50	Best
2	Midea Cube 50 (with pump)	0.67	33.6	50.0	$300	8.90	Top
3	Frigidaire FHDD5034Y1	0.43	21.6	49.7	$271	8.60	Mid
4	Ivation IVADDH06 (desiccant)	0.32	4.00	12.5	$290	7.90	Mid
5	Waykar 34-Pint	0.16	5.28	34.0	$176	7.60	Skip

Midea Cube 20Best

1.28 days

$200· num: 25.6

Midea Cube 50 (with pump)Top

0.67 days

$300· num: 33.6

Frigidaire FHDD5034Y1Mid

0.43 days

$271· num: 21.6

Ivation IVADDH06 (desiccant)Mid

Methodology

Days between empties = tank capacity (converted to pints) ÷ rated daily capacity (pints/day); higher is better. It answers the question a spec sheet never does: if you don't run a hose, how often do you actually carry it to a sink? We use manufacturer tank volumes and each unit's rated daily capacity. The Midea Cube 35 is held out because Midea publishes no tank volume for it, and the Pro Breeze is held out because it has no pint rating at all. Real intervals will be longer in practice, because a dehumidifier rarely runs at its rated capacity once the room starts drying out — treat this as a comparison between units, not a promise.

Published tank / reservoir volume
Rated daily capacity
Whether continuous drainage or a pump makes the tank irrelevant

Sources:Manufacturer specifications (Midea, Frigidaire, Waykar, Ivation) · ENERGY STAR certified product database · Manufacturer pricing, checked 2026-07-11

As of 2026-07-11 · Prices change. We resync daily; tap a product for the live offer.

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