Searching for a slimline dehumidifier means balancing two very different needs: a machine that fits a narrow spot and one that can actually manage the moisture in your room. My strongest choice for broad coverage is the DREO 75-pint smart dehumidifier, which pairs a relatively narrow footprint with high extraction capacity and app controls. The Waykar 34-pint is the more straightforward middle ground for sizable rooms, while the Lonxfy compact unit is the smallest and lightest option for a confined, mildly damp space.
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Those picks are not interchangeable. DREO and Waykar use compressor-style dehumidification and are designed for much heavier moisture loads, but both need more floor space and a plan for drainage. Lonxfy is easy to tuck away and quiet in sleep mode, yet its stated 350 ml daily capacity is far below the two larger units. I rank these models by how well their dimensions, capacity, drainage, and day-to-day handling suit the slimline brief—not by footprint alone.
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Key Takeaways
- The Lonxfy is the easiest to fit into a very tight space at 5.12 × 9.84 × 5.91 inches, but its 350 ml/day capacity suits light moisture rather than a persistently damp basement.
- DREO offers the strongest stated extraction at up to 75 pints per day and a 14.57-inch width, making it my pick when slim placement must coexist with high capacity.
- Waykar is the middle-capacity option: its 34-pint rating and 12.2-inch width are less imposing than DREO, though its 20.9-inch height still needs clearance.
- For either compressor model, continuous drainage can reduce tank-emptying chores; without a hose and suitable drain placement, the DREO’s 1.85-gallon and Waykar’s 0.66-gallon tanks need attention.
- Choose based on room moisture and the narrowest dimension that must fit: Lonxfy for a small, lightly damp room, Waykar for a larger room, and DREO for the heaviest listed load.
| DREO Energy Star 2025 Smart Dehumidifier for Basement, 1.85 Gal Water Tank |  | Best Overall for Slim Placement and Heavy Moisture | Moisture removal: Up to 75 pints per day; rating listed at 95°F and 95% RH | Coverage claim: Up to 4,500 sq. ft. | Dimensions: 9.17 × 14.57 × 24.49 in. (D × W × H) | VIEW LATEST PRICE | See Our Full Breakdown |
| Waykar 34-Pint Dehumidifier for Up to 2,000 Sq. Ft. |  | Best Mid-Range Capacity for Larger Rooms | Moisture removal: Up to 34 pints per day | Coverage claim: Up to 2,000 sq. ft. | Dimensions: 9 × 12.2 × 20.9 in. | VIEW LATEST PRICE | See Our Full Breakdown |
| Lonxfy Small Dehumidifier with Display and Auto Shutoff |  | Best Compact Pick for Small, Light-Duty Spaces | Moisture removal: Up to 350 ml per day under specified test conditions | Coverage claim: Up to 350 sq. ft. | Dimensions: 5.12 × 9.84 × 5.91 in. | VIEW LATEST PRICE | See Our Full Breakdown |
| slimline dehumidifier | Moisture removal | Coverage claim | Dimensions | Weight |
|---|---|---|---|---|
| DREO Energy Star 2025 Smart De | Up to 75 pints per day; rating listed at 95°F and 95% RH | Up to 4,500 sq. ft. | 9.17 × 14.57 × 24.49 in. (D × W × H) | 33 lb |
| Waykar 34-Pint Dehumidifier fo | Up to 34 pints per day | Up to 2,000 sq. ft. | 9 × 12.2 × 20.9 in. | 28.7 lb |
| Lonxfy Small Dehumidifier with | Up to 350 ml per day under specified test conditions | Up to 350 sq. ft. | 5.12 × 9.84 × 5.91 in. | 2.8 lb |
More Details on Our Top Picks
DREO Energy Star 2025 Smart Dehumidifier for Basement, 1.85 Gal Water Tank
DREO earns my top spot because it is the most capable model here without taking the widest listed footprint. At 14.57 inches wide and 9.17 inches deep, it is not a miniature appliance, but the proportions may be easier to work into a narrow basement aisle or utility area than a broader unit. Its stated capacity of up to 75 pints per day and coverage claim of up to 4,500 square feet put it in a different class from the Lonxfy, whose 350 ml/day rating is meant for much lighter moisture. The capacity is listed under very humid, warm test conditions, so I would not expect that maximum in every room.
Its appeal is not just extraction. The 1.85-gallon tank is the largest of the three, and the included drain hose offers a route to continuous operation when a gravity drain is available. That is a meaningful advantage over relying on a small reservoir in a space that needs sustained drying. The tank still has a finite capacity, though, and the advertised runtime between emptying depends on actual water collection; high moisture can fill it sooner than the stated example. The tank also adds to the unit’s overall bulk, so this is not the pick for a shelf or a cramped bathroom corner.
DREO supplies three fan speeds, automatic humidity control, a timer, a washable filter, auto defrost, and full-tank shutoff. The app can adjust humidity and show energy-use information, which gives it more monitoring and remote control than Waykar. Its listed 41 dB operation is a useful sound reference, though room placement and operating mode affect what you hear. The manufacturer claims lower energy use than standard DOE models; I see that as a feature claim rather than a promise of a particular household saving. Compared with Waykar, DREO brings higher stated capacity, a larger tank, and app access, but its 33-pound weight and nearly 24.5-inch height make moving and fitting it less effortless.
This is the most rounded choice when the slimline requirement is about fitting a capable machine into a limited-width floor area. I would skip it if the priority is the smallest possible body, minimal lifting, or modest moisture control for one compact room. The Lonxfy is far easier to place in those cases, while Waykar may be enough for buyers who do not need DREO’s higher stated capacity. Measure the full 9.17 × 14.57-inch footprint and height, and confirm that the hose can reach a suitable drain before treating its continuous-drain option as a convenience.
Pros:- Highest stated capacity in this lineup at up to 75 pints per day.
- 14.57-inch listed width balances a relatively narrow footprint with large-room capability.
- 1.85-gallon tank and included drain hose give more drainage flexibility than a small-tank unit.
- App control, humidity adjustment, energy-use monitoring, auto shutoff, and washable filter.
Cons:- At 33 pounds and 24.49 inches tall, it is much larger and heavier than the compact Lonxfy.
- Its maximum pint rating uses very warm, very humid test conditions and may not reflect typical room output.
- The tank still needs emptying when continuous drainage is not set up.
Best for: People who need substantial moisture removal for a basement or large room and have room for a roughly 14.57-inch-wide, 24.49-inch-tall appliance.
Not ideal for: Buyers seeking a truly tiny tabletop unit, a low-capacity solution for a small bedroom, or a lightweight appliance that is easy to carry between floors.
- Moisture removal:Up to 75 pints per day; rating listed at 95°F and 95% RH
- Coverage claim:Up to 4,500 sq. ft.
- Dimensions:9.17 × 14.57 × 24.49 in. (D × W × H)
- Weight:33 lb
- Tank capacity:1.85 gal (7 L)
- Drainage:Manual tank or continuous drain hose included
- Noise:Listed at 41 dB
- Controls and features:App control, adjustable humidity, timer, three speeds, washable filter, auto defrost
Our verdict“I recommend DREO when a narrow placement area must accommodate serious moisture removal, but not when the smallest body matters more than capacity.”
Waykar 34-Pint Dehumidifier for Up to 2,000 Sq. Ft.
Waykar is my practical middle choice: more serious than a compact personal dehumidifier, but less imposing on paper than DREO. Its 12.2-inch width is the narrowest of the two compressor models, and its 9-inch depth makes the listed footprint relatively compact for a machine rated at up to 34 pints per day. At 20.9 inches tall, it still needs floor space and vertical clearance; it is not a substitute for the much smaller Lonxfy. The stated coverage is up to 2,000 square feet, making this a better match for a sizable room or a moderate moisture problem than a cramped closet or small bedside space.
The key tradeoff against DREO is capacity versus footprint and complexity. Waykar’s 34-pint rating is lower than DREO’s 75-pint figure, and its coverage claim is also smaller, but many households may not need the higher-capacity appliance. Waykar provides automatic humidity control across a stated 30%–80% range, two fan speeds, a 24-hour timer, and automatic restart after a power outage. The included drain hose supports continuous drainage, while the 0.66-gallon tank is relatively small if you instead rely on manual emptying. That makes hose placement more than a minor convenience for frequent operation.
Its listed 28.7-pound weight is lighter than DREO’s 33 pounds, and wheels and lift-up handles support moving it between rooms. Those details make it more manageable, although neither model is as easy to relocate as Lonxfy at 2.8 pounds. A washable filter helps limit disposable-filter upkeep, and automatic defrost and shutoff add useful safeguards. The unit’s 230-watt specification and 62 CFM airflow describe its listed electrical use and air movement, but do not by themselves predict how quickly it will dry a particular room. Its rated output is also tied to hot, humid test conditions, so I would use the capacity as a comparison point rather than a guaranteed everyday result.
For buyers who need a compressor dehumidifier but do not need DREO’s highest listed capacity or app-based monitoring, Waykar offers a sensible compromise. It is more capable than Lonxfy for substantial room moisture and has a narrower listed width than DREO, though it gives up tank volume and some capacity. I would skip it if a very small tank would become a chore, if the space cannot accommodate a 20.9-inch-tall floor unit, or if a severe moisture load points toward DREO instead. Its slimness is relative: measure the full body and leave space for airflow and hose routing.
Pros:- 12.2-inch listed width and 9-inch depth make it the narrower compressor option here.
- 34-pint daily capacity and up-to-2,000-square-foot coverage suit larger spaces better than Lonxfy.
- Included hose, automatic humidity control, and automatic restart support ongoing operation.
- Wheels, handles, washable filter, and two fan speeds add practical day-to-day flexibility.
Cons:- The 0.66-gallon tank is small if a drain hose cannot be used.
- At 28.7 pounds and 20.9 inches tall, it is still a floor appliance rather than a truly compact unit.
- Its rated capacity is specified under warm, humid conditions and may be lower in other environments.
Best for: Buyers who need a compressor model for a room up to the stated 2,000-square-foot coverage claim and want a narrower listed width than DREO.
Not ideal for: Anyone seeking a tiny or whisper-quiet personal unit, a large water reservoir, or the highest stated extraction capacity in this group.
- Moisture removal:Up to 34 pints per day
- Coverage claim:Up to 2,000 sq. ft.
- Dimensions:9 × 12.2 × 20.9 in.
- Weight:28.7 lb
- Tank capacity:0.66 gal (2.5 L)
- Drainage:Manual tank or included 6.56-ft hose
- Humidity and fan settings:30%–80% humidity range; two fan speeds
- Power and airflow:230 W; 62 CFM
Our verdict“I would choose Waykar for a larger room that needs meaningful drying in a narrower compressor footprint, provided continuous drainage is practical.”
Lonxfy Small Dehumidifier with Display and Auto Shutoff
Lonxfy is the clear choice when slimline means genuinely small. Its listed body measures 5.12 × 9.84 × 5.91 inches and weighs just 2.8 pounds, so it is far easier to tuck onto a small surface or move between rooms than either compressor model. That compact size is the point: this is an option for a small room, a confined corner, or a space with mild humidity where a large floor unit would be awkward. Its coverage claim reaches up to 350 square feet, but the more useful reality check is its stated removal rate of up to 350 ml per day. That is nowhere near the capacity listed for DREO or Waykar.
It has a 1-liter tank with automatic shutoff when full, plus an anti-spill design, smart defrost, and a timer with 4-, 8-, or 12-hour settings. Sleep mode is listed at 32 dB, which gives it a quieter stated setting than DREO’s 41 dB figure, though the appliances differ greatly in capacity and should not be compared as if they were equivalent machines. A 7-color LED adds an ambient-light feature, but it is not a substitute for humidity control. The provided feature list does not describe the kind of adjustable humidity control or continuous drain hose offered by the larger picks.
Because the tank is only 1 liter, collected moisture has to be emptied when it reaches capacity. Automatic shutoff helps prevent overflow, but it also means the appliance pauses until someone empties the tank. That may be manageable in a lightly damp room; for a persistently wet basement, repeated collection and limited daily output make it a poor match. DREO and Waykar are the stronger choices for active moisture problems and continuous use, while Lonxfy wins on weight, dimensions, and ease of placement. Its low 40-watt power specification and stated 0.54 kWh per 24 hours give buyers useful operating figures, but they do not change the modest extraction ceiling.
I rank Lonxfy third overall because the roundup centers on useful slimline dehumidification, not footprint alone. It is the best compact pick and may be the right answer for a small, lightly humid space where storage and quiet operation matter more than rapid drying. I would skip it for a basement, a large open-plan area, or any room with persistent condensation or damp materials. For those jobs, a larger compressor unit takes more room but has much more listed moisture-removal capacity. Check the actual dimensions of the intended placement and keep the tank accessible for emptying.
Pros:- Smallest and lightest model in this comparison at 2.8 pounds.
- 32 dB sleep mode is the lowest stated noise figure among the three products.
- Full-tank automatic shutoff and anti-spill tank design help prevent overflow.
- Timer, smart defrost, and 7-color LED add convenience in a small room.
Cons:- Up to 350 ml/day is far below the stated capacity of Waykar and DREO.
- The 1-liter tank must be emptied manually when full; no continuous hose is listed.
- Limited capacity makes it unsuitable for persistent dampness or a large moisture load.
Best for: People with a small room or confined spot who want a lightweight appliance for mild, localized humidity and value quiet sleep mode.
Not ideal for: Buyers tackling a damp basement, persistent condensation, a large open area, or any moisture problem that needs high daily extraction or continuous drainage.
- Moisture removal:Up to 350 ml per day under specified test conditions
- Coverage claim:Up to 350 sq. ft.
- Dimensions:5.12 × 9.84 × 5.91 in.
- Weight:2.8 lb
- Tank capacity:1 L (1,000 ml)
- Noise:32 dB in sleep mode
- Power and energy use:40 W; listed at 0.54 kWh per 24 hours
- Controls and features:4-, 8-, or 12-hour timer, sleep mode, smart defrost, 7-color LED, auto shutoff
Our verdict“I recommend Lonxfy only when compact size and light-duty use matter more than fast or high-volume moisture removal.”
How We Picked
I treated slimline as a practical fit question, not a synonym for “smallest.” A tiny appliance is not a useful pick for a damp basement if it cannot remove moisture at the required rate, and a high-capacity model is not a sensible choice if its body cannot fit the intended spot. I compared the supplied dimensions alongside moisture-removal ratings, coverage claims, tank capacity, drainage options, sound information, and controls.
Capacity figures need context. DREO’s 75-pint rating is listed at 95°F and 95% relative humidity, while Waykar’s 34-pint rating is stated for conditions up to 95°F and 90% relative humidity. Those test conditions are not identical, and actual moisture removal depends on room temperature and humidity. Lonxfy’s figure is given in milliliters per day under specified conditions, so I do not treat it as a directly equivalent measurement to either pint rating. The large difference still makes its intended use clear: it is for lighter, localized moisture, not comparable basement duty.
My ranking gives the top position to the model with the strongest blend of narrow placement and useful capacity, then separates a more moderate compressor option from a truly compact, low-capacity appliance. I also weigh the routine burden of emptying a tank. A hose can make continuous operation far easier, but it only helps when the drain can sit lower than the outlet and the setup is practical. I avoid treating manufacturer coverage or energy claims as guarantees for every home, and I do not assume that a slim width means a shallow body. Check all three dimensions against the exact space before choosing.
| slimline dehumidifier | Moisture removal | Coverage claim | Drainage |
|---|---|---|---|
| DREO Energy Star 2025 Smart De | Up to 75 pints per day; rating listed at 95°F and 95% RH | Up to 4,500 sq. ft. | Manual tank or continuous drain hose included |
| Waykar 34-Pint Dehumidifier fo | Up to 34 pints per day | Up to 2,000 sq. ft. | Manual tank or included 6.56-ft hose |
| Lonxfy Small Dehumidifier with | Up to 350 ml per day under specified test conditions | Up to 350 sq. ft. | — |
Factors to Consider When Choosing Best Slimline Dehumidifiers
Choosing a slimline dehumidifier starts with the room and its moisture load, then moves to the dimensions that actually need to fit. A unit can have a narrow width but still be too tall, deep, heavy, or awkward to drain for your setup. I would compare the complete footprint, listed capacity, and tank routine together rather than picking by the word “compact.”
Measure the space in three dimensions
Check width, depth, and height against the exact floor or shelf location, including the room needed to access the tank and controls. DREO is 14.57 inches wide, 9.17 inches deep, and 24.49 inches tall; Waykar is 12.2 inches wide, 9 inches deep, and 20.9 inches tall. Lonxfy is much smaller at 5.12 × 9.84 × 5.91 inches. Those figures point to different kinds of placement: the first two are floor appliances, while Lonxfy is designed for compact spaces. Leave suitable clearance for airflow, and check whether a drain hose will have a clear route if you plan to use one.
Match rated capacity to the moisture problem
For a basement or a room with persistent dampness, a small appliance may run without keeping up. DREO lists up to 75 pints per day, Waykar up to 34 pints, and Lonxfy up to 350 ml. These figures use different units and specified test conditions, so they are not perfectly like-for-like. DREO’s maximum is listed at 95°F and 95% relative humidity; Waykar’s operating capacity is specified for conditions up to 95°F and 90% relative humidity. Cooler or drier rooms can produce different results. Use capacity as a guide to intended workload, not a promise that a model will remove its maximum every day.
Think through tank emptying and drainage
A water tank determines how often you need to intervene, but its practical workload depends on how quickly the machine collects water. DREO has the largest listed tank at 1.85 gallons; Waykar holds 0.66 gallons, and Lonxfy holds 1 liter. DREO and Waykar include hose-based continuous-drain options. These can reduce manual emptying when the water can flow to a suitable drain, but placement and gravity matter: a hose does not help if the drain is too high or too far away. Lonxfy has no continuous hose listed, so its tank needs to be emptied when full, with automatic shutoff pausing operation.
Compare sound and daily controls
Noise figures help set expectations but are not a full measure of how a unit will sound in your room. Lonxfy lists 32 dB in sleep mode, DREO lists 41 dB, and no comparable Waykar noise figure is provided here. Lonxfy’s smaller extraction capacity is a separate tradeoff, so a quiet setting should not be mistaken for basement-level performance. DREO adds app control, energy-use monitoring, humidity adjustment, and three speeds; Waykar provides automatic humidity control, two speeds, a timer, and power-outage restart. Choose features that solve a real routine problem, such as remote adjustment or a drain setup, rather than treating a longer feature list as automatically better.
Check portability and upkeep
Weight changes how easy it is to reposition a unit, even if wheels or handles are fitted. Lonxfy weighs 2.8 pounds, Waykar 28.7 pounds, and DREO 33 pounds. Waykar lists wheels and lift-up handles; DREO lists portability but is the heaviest of the three. Both larger picks have washable filters, while Lonxfy lists a compact design and automatic shutoff. Before moving a filled unit, empty its tank and follow its handling guidance. For ongoing use, also think about where the filter can be accessed and whether the appliance can sit near a drain without blocking a walkway.
Treat coverage and energy claims as estimates
Coverage claims of 4,500, 2,000, and 350 square feet give a rough sense of intended scale, but a room’s temperature, air circulation, moisture source, and layout affect performance. An open basement with damp walls is a different task from a closed bedroom with mild humidity. DREO states Energy Star 2025 certification and a reduced-energy-use claim; Lonxfy lists 40 watts and 0.54 kWh per 24 hours, while Waykar lists 230 watts. These specifications describe different products and should not be used alone to predict household bills. I would first choose a model that can handle the room, then compare the available energy and control details.
Frequently Asked Questions
Which of these is the slimmest dehumidifier?
Lonxfy is the smallest by a wide margin, with listed dimensions of 5.12 × 9.84 × 5.91 inches and a weight of 2.8 pounds. Its compact body makes it easiest to place in a tight spot, but its up-to-350-ml daily removal rate is far below the two larger models. If “slimmest” means the narrowest compressor appliance, Waykar is 12.2 inches wide compared with DREO at 14.57 inches.
Is the Lonxfy suitable for a basement?
I would not choose Lonxfy for a persistently damp basement or a large moisture problem. Its stated capacity is up to 350 ml per day, and its 1-liter tank requires manual emptying when full. DREO and Waykar have much higher stated pint-per-day capacities and continuous-drain hose options, making them more appropriate starting points for a basement, subject to the room’s conditions and a workable drain location.
Should I choose DREO or Waykar for a large room?
DREO is the stronger candidate when the room has a heavy moisture load or the higher listed capacity and app controls matter: it is rated up to 75 pints per day and claims coverage up to 4,500 square feet. Waykar lists up to 34 pints and up to 2,000 square feet, with a narrower width and a lighter body. Their ratings use different specified test conditions, so compare them as broad indicators rather than guaranteed room results.
Do I need to use a drain hose?
No, both DREO and Waykar can collect water in their tanks, and Lonxfy uses its tank with automatic shutoff. A hose is useful for extended operation because it can reduce the need to empty the reservoir, but it only works when you can route it to a suitable drain. Tank size alone does not determine how often you will empty it; a room with more moisture can fill a tank faster.
Can I compare the listed pint and milliliter capacities directly?
Not as exact, equal-condition measurements. DREO’s maximum is listed at 95°F and 95% relative humidity, Waykar’s capacity is specified under warm, humid conditions up to 95°F and 90% relative humidity, and Lonxfy’s 350-ml figure is given under specified test conditions without an equivalent test description here. The figures still show a broad difference in intended capacity, but actual removal depends on the room’s temperature, humidity, and moisture source.
Conclusion
My recommendation depends on what “slimline” needs to solve. Choose DREO if you need the highest listed extraction capacity, app controls, and a large tank in a relatively narrow floor footprint. Choose Waykar if you want a narrower compressor unit with moderate-to-high capacity for a sizable room and can make use of its drain hose. Choose Lonxfy if space and portability matter most and the room only has light, localized humidity. For a basement or persistent dampness, I would prioritize the larger models’ capacity over Lonxfy’s very small dimensions; for a small room with limited moisture, the larger machines may take up space without providing a useful advantage.
