20-pint versus 30-pint

The two classes, from the certified data

Four dollars a month is the entire running-cost argument for the smaller machine, and it disappears the moment the smaller machine has to run longer to achieve the same thing. That is the whole comparison in one sentence.

What 20 pints is genuinely for

There is a real use case and it is narrower than the listings suggest:

• One room, above grade, mildly damp. A bedroom or a home office reading 60 to 65% in August, with no visible moisture anywhere.
• A room where the unit has to be small. These are physically smaller and lighter, which matters if it moves between rooms or lives on a shelf.
• A space you already dried out and now want to hold. Maintaining 50% is much less work than getting to 50% in the first place.
• Somewhere the noise matters more than the speed. A smaller compressor in a correctly sized room runs longer, gentler cycles.

Where it fails, and why the failure is expensive

Every figure in the table above assumes the machine reaches its humidity target and idles. An undersized unit never does. It runs continuously at full draw and the room stays where it was.

That inversion is the reason this site keeps saying the same thing: undersizing is the most expensive mistake in the category, and it is more expensive than any efficiency difference between two correctly sized machines. The same arithmetic at the next size up.

The honest recommendation

In practice, we would take the 30-pint class in almost every case where someone is genuinely choosing between the two. The running-cost gap is four dollars a month, the efficiency gap runs the other way, and the downside of guessing wrong is asymmetric - an oversized unit cycles a bit more, an undersized one simply does not work.

Quick picks

#	Product	Best for	Draw	Price
1	hOmeLabs 32 Pint DehumidifierThe one hOmeLabs unit with a named entry in the ENERGY STAR list, so it is the one where the running cost is a published figure rather than a class estimate.	A bedroom that is damp but not wet	318 W	$234.99/View on Amazon Listing withdrawn - this searches the model. #ad Price as of October 21, 2026. How we are funded
2	Honeywell Smart Wi-Fi 30 Pint Dehumidifier (TP50AWKN)The anti-spill design is the actual selling point here, and it is a better reason to buy than the voice control the listing leads with.	A room you want to run on a schedule	Not published	$290.60/View on Amazon #ad Price as of October 21, 2026. How we are funded

1

hOmeLabs

hOmeLabs 32 Pint Dehumidifier

Best for: A bedroom that is damp but not wet

The one hOmeLabs unit with a named entry in the ENERGY STAR list, so it is the one where the running cost is a published figure rather than a class estimate.

Average draw

318 W

Computed from the ENERGY STAR certified entry hOmeLabs HME0089: 32.46 pt/day at IEF 2.01 L/kWh. This is the only hOmeLabs capacity in this registry with a named certified entry, which is why it is the only one carrying a number rather than a band.

What is good

• +318 W against the 50-pint class median of 488 W - about 35% less to run, hour for hour
• +Named in the ENERGY STAR certified list, so its IEF is public
• +Quiet enough for a bedroom in a way that a 50-pint compressor generally is not
• +Wi-Fi and auto shut-off at a small-unit price

What is not

• -32 DOE pints is genuinely less water than 50 - undersizing a wet basement costs more than the machine saved
• -Gravity drainage only
• -4,500 sq ft coverage for 32 pints is another claim to ignore

Who it is for

A bedroom, a home office, or a small basement that is humid rather than actively wet.

Skip it if

Skip it if the floor is ever damp to the touch or the walls sweat. That is a 50-pint problem, and a 32-pint machine will run continuously and still lose.

2

Honeywell

Honeywell Smart Wi-Fi 30 Pint Dehumidifier (TP50AWKN)

Best for: A room you want to run on a schedule

The anti-spill design is the actual selling point here, and it is a better reason to buy than the voice control the listing leads with.

Average draw

Not published

Not published. Honeywell's certified 32-pint entries, the TPFIT32AWK and TPFIT32WK, compute to 318 W at 32.46 pt/day and IEF 2.01. This is a different product line, so that figure sits in the note rather than in the spec table.

What is good

• +Anti-spill bucket, which matters more than any app feature if the machine lives upstairs
• +Scheduling through the app, so it can run when electricity is cheapest
• +ENERGY STAR certified at a small-room capacity
• +Alerts on the phone rather than only a beep in an empty room

What is not

• -No published wattage, and the certified list carries a different Honeywell line
• -3,000 sq ft for 30 pints is an optimistic claim
• -Depends on Honeywell's app remaining supported

Who it is for

An upstairs room or a rental where a spilled bucket is somebody's ceiling, and where scheduling is genuinely useful.

Skip it if

Skip it if the machine will sit on concrete next to a drain. You would be paying for spill protection and scheduling that a floor drain makes irrelevant.

One thing neither class can do

Work in the cold. Both are compressor machines, and a compressor's output falls sharply below about 60F and collapses near 41F. If the room you are sizing for is an unheated garage, shed or winter crawl space, the capacity question is the wrong question - the technology is. Desiccant versus compressor.