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The best 30-pint dehumidifiers

A third less power than the basement machines, for rooms that are humid rather than wet. The trap is buying one for a room that needed the bigger unit.

By Scooter M.

Published

Last updated

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Rain running down an apartment window above a city street

The short answer

A 30 to 32-pint dehumidifier draws about 318 watts, roughly 35% less than a 50-pint unit, and suits a bedroom, an apartment, a home office or a small basement that is humid rather than actively wet. It costs about $21 a month running 12 hours a day at the US average electricity rate.

Who this class is genuinely for

There is a real category of room here and it is bigger than people think: a space that smells slightly musty in August, where nothing is visibly wet and nothing is growing, but a hygrometer reads 62%. That room does not need a 50-pint compressor thumping away in the corner. It needs about 30 pints a day and quiet.

The efficiency case is real too. The certified 30-32 pint class averages 318 W against the 50-pint class's 488. Run 12 hours a day through a five-month damp season, that is a difference of about $55 - which on cheaper units is a meaningful fraction of the purchase price.

And who it is not for

If the floor is ever damp to the touch, if the walls sweat, if there is a white bloom on the block, or if the room has ever flooded, this is not the class. A dehumidifier that cannot reach its target humidity does not run at a reduced load - it runs flat out, forever, at its full draw. You get the worst of both: the smaller machine's capacity and none of its efficiency advantage.

A sparsely furnished bedroom in low evening light
The rooms this class is genuinely for: humid rather than wet.

Quick picks

#ProductBest forDrawPrice
1
hOmeLabs 32 Pint DehumidifierhOmeLabs 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 wet318 W
2
Waykar 34 Pint ENERGY STAR DehumidifierWaykar 34 Pint ENERGY STAR DehumidifierOne of the few units at any size that will set below the usual 40% floor, which is the difference between a dry basement and a merely less-damp one.
Drying below 40% relative humidityNot published
3
Waykar 30 Pint ENERGY STAR DehumidifierWaykar 30 Pint ENERGY STAR DehumidifierA small-footprint unit sized for one room, and one of the cheapest ways to buy an ENERGY STAR Most Efficient claim at this capacity.
An apartment or a single damp roomNot published
4
Honeywell Smart Wi-Fi 30 Pint Dehumidifier (TP50AWKN)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 scheduleNot published
1

hOmeLabs

hOmeLabs 32 Pint Dehumidifier

Best for: A bedroom that is damp but not wet

hOmeLabs 32 Pint Dehumidifier

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.

We have not tested this unit. Every figure above is quoted from the manufacturer or computed from published certification data, and every source is linked. How we work.

2

Waykar

Waykar 34 Pint ENERGY STAR Dehumidifier

Best for: Drying below 40% relative humidity

Waykar 34 Pint ENERGY STAR Dehumidifier

One of the few units at any size that will set below the usual 40% floor, which is the difference between a dry basement and a merely less-damp one.

Average draw

Not published

Waykar publishes no wattage and sells this capacity under several certified model numbers rather than one. Its certified 35-pint entries - JD025CE-120, CHWA120A/B/E and the YD-120 family - compute to between 342 W and 362 W, clustering at 345 W. That band is the honest figure; picking one of those model numbers to print under this listing would be a guess.

What is good

  • Sets down to 30% RH where most units stop at 40%, which matters for storage and post-flood drying
  • Automatic defrost, so it keeps working as the room cools
  • Drain hose in the box rather than a separate purchase
  • A 2,000 sq ft coverage claim that is at least in the same universe as its capacity

What is not

  • No wattage published and no single certified model number to map to
  • 0.66 gallon tank is small - on bucket duty in a damp room this is a twice-a-day machine
  • Gravity drainage only

Who it is for

Storage rooms, workshops and basements where 40% is not dry enough and you have somewhere for the hose to go.

Skip it if

Skip it if you plan to empty a bucket. At 0.66 gallons and 34 pints a day, a full tank is roughly four hours of work.

We have not tested this unit. Every figure above is quoted from the manufacturer or computed from published certification data, and every source is linked. How we work.

3

Waykar

Waykar 30 Pint ENERGY STAR Dehumidifier

Best for: An apartment or a single damp room

Waykar 30 Pint ENERGY STAR Dehumidifier

A small-footprint unit sized for one room, and one of the cheapest ways to buy an ENERGY STAR Most Efficient claim at this capacity.

Average draw

Not published

No published wattage. The certified 30-32 pint class runs 293-318 W with a median of 318 W across 21 certified models, and Waykar's own certified CTH120 series sits at 318 W.

What is good

  • Small enough to live in a closet or beside a washer without being in the way
  • Roughly a third less power than a 50-pint unit for a room that does not need one
  • Continuous drainage supported, not just the bucket
  • The most sensible coverage claim in this registry relative to its capacity

What is not

  • 0.62 gallon tank, the smallest here
  • No published wattage
  • 30 DOE pints is not a basement machine

Who it is for

Apartments, bedrooms, and single rooms where the humidity is a comfort problem rather than a structural one.

Skip it if

Skip it for anything below grade. A basement will beat it, and an undersized machine runs constantly, which costs more than the bigger one would have.

We have not tested this unit. Every figure above is quoted from the manufacturer or computed from published certification data, and every source is linked. How we work.

4

Honeywell

Honeywell Smart Wi-Fi 30 Pint Dehumidifier (TP50AWKN)

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

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.

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.

We have not tested this unit. Every figure above is quoted from the manufacturer or computed from published certification data, and every source is linked. How we work.

The 30% setting, and why it is on this page

Most dehumidifiers will not set below 40% relative humidity. Two of the Waykar units here go to 30%. That sounds like a spec-sheet detail and it is occasionally the whole reason to buy one: drying out a space after a leak, keeping a storage room genuinely dry rather than merely comfortable, or protecting tools and paper.

For ordinary living space it is not a feature you want to use. The EPA's guidance is to keep indoor humidity below 60% and ideally between 30 and 50; running a bedroom at 30% is dry enough to be uncomfortable and costs more to hold. Ideal humidity settings.

What we would skip

  • A 30-pint unit in a genuinely wet basement

    This is the false economy of the category. An undersized machine never reaches its humidity target, so it never cycles off, so it runs at full draw all day and still loses. The 170 W you saved by not buying the 50-pint model gets spent several times over, and the basement stays damp.

  • Any unit here on bucket duty in a damp room

    Tanks in this class run 0.62 to 0.66 gallons. At 30 pints a day that is roughly four hours before it is full. If there is nowhere to run a hose, you are signing up to empty it before work and after dinner, indefinitely.

How we picked

  • Certified at 27 to 38 pints per day under the DOE procedure - the 30 to 35-pint band.
  • Computed average draw where a named ENERGY STAR entry exists. The class runs 293 to 318 W.
  • Tank size, because at this capacity most of these will be run on a bucket at least some of the time.
  • How low the humidistat will set. Most stop at 40%; two of these go to 30%.
  • Not tested by us. Figures quoted or computed, sources named.

We did not test these units. The full criteria and their weighting are on the methodology page.

FAQ

Questions

Is a 30-pint dehumidifier enough for a basement?
Only a small, dry-ish one - under about 1,500 square feet and reading below roughly 68% relative humidity. Anything wetter and the machine will run continuously without reaching its target.
What was a 30-pint dehumidifier called before 2020?
Roughly a 50-pint. ENERGY STAR's published correlation maps an old 50-pint rating to 30 pints under the current procedure.
How much does a 30-pint dehumidifier cost to run?
At the class median of 318 W and the US average rate of 18.34 cents per kWh, about $14 a month at 8 hours a day, $21 at 12 hours, or $42 running continuously. Calculate yours.

Sources

Sources

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