30-pint versus 50-pint

The two numbers, side by side

The failure mode that inverts the arithmetic

Everything above assumes both machines reach their humidity target and idle. That is what makes the comparison a straightforward trade of capacity against 170 watts.

An undersized machine never gets there. It runs continuously at full draw, twenty-four hours a day, and the room stays damp. At 318 W running permanently that is $42 a month - more than the correctly sized 50-pint unit costs at twelve hours - and you still have the problem you bought it to fix.

This is the whole argument for erring upward when you are unsure. Oversizing costs you slightly more per hour and some extra compressor cycling. Undersizing costs you more in absolute terms and does not solve the problem.

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	Check price on Amazon #ad How we are funded
2	Midea Cube 50 Pint DehumidifierThe only unit here that solves the real basement problem, which is not capacity but where the water goes when you are not standing next to it.	A basement you visit once a month	487 W	Check price on Amazon #ad How we are funded
3	Waykar 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 room	Not published	Check price on Amazon #ad How we are funded
4	GE ENERGY STAR 50 Pint DehumidifierThe same 50-pint platform as the pump model with the pump removed, which makes it the cheaper choice when the water can simply run downhill.	A garage or shop with a floor drain	487 W	Check price on Amazon #ad 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

Midea

Midea Cube 50 Pint Dehumidifier

Best for: A basement you visit once a month

The only unit here that solves the real basement problem, which is not capacity but where the water goes when you are not standing next to it.

Average draw

487 W

Computed from the ENERGY STAR certified entry for Midea MAD50S1QWT-A, the 50 pt / 4,500 sq ft Cube without a pump: 49.67 pt/day at IEF 2.01 L/kWh. Midea's own US product page confirms MAD50S1QWT-A is this configuration. Midea publishes no wattage on the Amazon listing or on that page.

What is good

• +The body separates, so the tank half can sit lower than the compressor half and the hose gets a genuine downhill run
• +Certified at 49.67 pt/day, which is a real 50-pint machine rather than a saturation number
• +IEF 2.01 L/kWh puts it exactly on the median for the 50-pint class - neither a bargain nor a penalty
• +Wi-Fi that tells you it has stopped, which is the only smart feature that matters in a basement

What is not

• -No pump, so the drain has to run downhill the whole way
• -Midea publishes no wattage anywhere, so the 487 W above is computed rather than quoted
• -The 4,500 sq ft coverage claim is marketing, not a spec - see the sizing guide

Who it is for

Someone with a floor drain, a sump, or a window well lower than the machine, who wants to set it once and stop thinking about it.

Skip it if

Skip it if the only drain in the room is higher than the unit. Without a pump, gravity is the entire drainage system, and no setting fixes an uphill hose.

3

Waykar

Waykar 30 Pint ENERGY STAR Dehumidifier

Best for: An apartment or a single damp room

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.

4

GE

GE ENERGY STAR 50 Pint Dehumidifier

Best for: A garage or shop with a floor drain

The same 50-pint platform as the pump model with the pump removed, which makes it the cheaper choice when the water can simply run downhill.

Average draw

487 W

Computed from the ENERGY STAR certified entry GE ADSE50X: 49.64 pt/day at IEF 2.01 L/kWh. Same certified platform as the pump variant - removing the pump does not change the DOE capacity or the IEF, so it does not change the computed draw.

What is good

• +Identical certified capacity and efficiency to the pump model at a lower price
• +Clean-filter alert, which is the maintenance nobody remembers to do
• +Auto defrost, so it keeps working in a cold garage rather than icing solid
• +Simple enough to be repairable

What is not

• -Gravity drainage only
• -No published wattage from GE
• -No app or timer if you want scheduled running

Who it is for

A garage, workshop or utility room with a floor drain and no interest in connectivity.

Skip it if

Skip it below about 41F. Every compressor unit on this page loses capacity as the coil approaches freezing - that is when a desiccant machine starts to win.

Where the 30-pint genuinely wins

• A bedroom. Not because of capacity but because of noise. A correctly sized 30-pint unit runs long steady cycles; an oversized 50-pint one starts and stops all night, which is the sound people actually complain about.
• An apartment you pay the bill for, where the moisture load is genuinely modest and $11 a month for five months is real money.
• A room above grade that reads 60 to 65% in summer and nothing worse. Most of the load in these rooms is occupancy - showering, cooking, drying laundry - rather than the structure.
• Where the unit has to be physically small. The 30-pint machines here are meaningfully lighter and more portable, which matters if it moves between rooms.

And where the 50-pint is not optional

Any basement. Any space reading above 68%. Anything over about 1,500 square feet. Anything with visible moisture. And any space where you want the machine to have headroom, because the humidity load is not constant - a wet August week can double it, and a machine with no headroom just runs longer.

The way to settle it without guessing is to measure. A hygrometer costs about ten dollars and answers the question definitively in a week. The sizing method.