Best Costway Dehumidifiers (2026)

This is the Costway to buy if you want a number you can actually plan around. The listing gives three capacity ratings instead of one: 100 pints at the flattering 95F and 90% humidity lab condition, 85 pints at 86F and 80%, and 36 pints under the DOE test. That DOE figure is the honest one for a cool basement, and it still puts this unit well above the 30 and 32 pint Costway models on real moisture removal.

The smart layer is useful rather than decorative. Wi-Fi and Bluetooth control through the Smart Life app plus Alexa support means you can check and change the humidity target from upstairs, which matters because a basement unit is easy to forget about. Four modes (auto, continuous drying, sleeping and fan) and two fan speeds cover most situations. Compared with the 80 pint Costway that has a pump, this one has a smaller 1.3 gallon tank, so on a wet week you will either empty it often or run the hose to a floor drain.

The practical limits are drainage and maintenance. With no pump, continuous drainage is gravity only, so the unit needs to sit higher than the drain. At 36 DOE pints a day, that small tank fills quickly in a wet season, so treat the hose connection as part of the purchase. Rinse the mesh filter monthly during the damp season, keep the coil fins free of dust, and plan on a storage cover if the unit sits through a dry winter.

The 80 pint pump model is the Costway that solves the most annoying basement problem, which is a drain that sits above the machine. Three drainage options come in the box: empty the 2.2 gallon tank by hand, run the 2 ft hose to a floor drain, or switch on the pump and push water up and out through the supplied tubing. A pump moves the condensate through a small impeller, so the water can climb to a utility sink or a window instead of relying on gravity.

The 80 pint figure is the 95F and 90% humidity rating, so it overstates what you will see in a 65F basement. Treat it as roughly a mid-size machine in practice and size the room accordingly. Next to the 100 pint smart model this one has no app, but it has a bigger tank and noise listed at 41 dB or less, which is respectable for the capacity. An interior drying function runs the fan after shutdown to dry the coil area, which helps reduce musty smells between cycles.

Ownership comes down to the pump. Pumps are the part most likely to clog with lint or algae, so rinse the reservoir and run a cup of diluted vinegar through the hose once or twice a season. Keep the discharge hose short and sloped so it never holds standing water, and unplug the unit and drain it completely before storing it for winter.

This model is useful mostly because the listing is honest enough to teach you something: 80 pints per day at 95F and 90% humidity, but only 24 pints per day by the DOE standard. That 3.3 to 1 gap between the marketing figure and the regulatory figure is the single most important thing to understand about every dehumidifier on this page. A 24 pint DOE machine is a perfectly good unit for a damp bedroom, bathroom or small finished basement, yet the 4,000 sq ft coverage claim should be taken with a large grain of salt.

Compared with the 100 pint smart Costway, which lists 36 DOE pints, this one removes roughly a third less water under the same standard and has no app. In exchange it is lighter on the budget tier and runs at as low as 42 dB. It also has a modest 1 gallon tank, so continuous drainage with the 2 ft hose and drain plug is the realistic way to use it in a basement. A child lock, memory restart and inside drying are included, which cover the basics of unattended running.

Day to day it behaves like any small refrigerant unit. The compressor will frost the coil in cool rooms, and auto defrost periodically pauses cooling to melt the ice, which temporarily lowers output below 65F. Wash the mesh, wipe the coil with a soft brush and keep a few inches clear around every vent. If the room is genuinely large or the basement smells musty, step up to the pump model or the 150 pint unit instead.

The 32 pint model is the quietest Costway here, with noise listed as low as 36 dB. That is the level of a quiet library, which makes this the right size and the right sound profile for a bedroom, nursery or home office. The 32 pint figure is again the warm and humid lab condition, so it is a small machine in real life. It suits a single room, not an open basement.

Three modes handle most jobs. Continuous mode runs until you stop it, auto holds a humidity target, and a drying mode keeps the fan and compressor going to dry laundry on a rack. A three color indicator on the front shows whether the room is dry, comfortable or damp without reading the display, which is a small but practical touch. Compared with the 80 pint models, you give up tank size and drainage flexibility but gain a lighter, quieter machine that is easy to carry.

In ownership terms this is the simplest machine in the lineup. The 3.3 ft hose is enough for a bathroom sink or tub, and the washable filter pulls out for a rinse. Because it is a compressor design, keep it in a room above about 65F for full output, and expect it to cycle its defrost in cooler rooms.

The 150 pint unit is built for spaces where the small machines simply cannot keep up, such as an unfinished basement with a sump pit, a large crawl-adjacent room or a garage workshop. It pairs a large compressor with three fan speeds, a 2.4 gallon tank and a 16.4 ft pump hose, so the water can leave the room without anyone carrying a bucket. The 45 dB rating is quite reasonable for this size.

Treat the 150 pint number as a ceiling that applies at 95F and 90% humidity, not a promise for a 60F basement. In cool, damp conditions the real output is a fraction of that, but a machine this size still moves far more air and water than the 80 pint units. Against the 215 pint commercial model it is much lighter and quieter, and it keeps the home dehumidifier features such as a child lock, memory restart and auto defrost.

Plan the install before you buy. Route the pump hose with a continuous upward-then-down path and avoid kinks, since a kinked hose can overheat the pump. Keep the unit off carpet, leave clearance around the intake and rinse the mesh each month. If the humidity target is never reached after two or three days, the room is bigger or wetter than one machine can handle, and a second unit or a source fix such as a gutter or grading repair will do more than turning the dial down.

This is a commercial-style machine, aimed at water damage restoration, construction drying and big warehouse or shop spaces. At 215 pints per day on the warm and humid rating it is more than double the 100 pint smart model, and it is the only machine here that makes sense for a flooded room. The cabinet is built to be rolled around a site, with two large directional wheels, two lockable universal wheels and a push-pull handle.

The caveat is the same as with every rating. Commercial dehumidifier capacity is often quoted at 80F and 60% humidity by industry convention, but here the listing uses 95F and 90%, so expect meaningfully less in a cool space. It also lacks a pump, so you will want a floor drain or a transfer pump downstream. Compared with the 150 pint home unit, you gain raw capacity and rugged mobility, and you lose the quiet and household features.

Think of it as a tool, not an appliance. Use it with doors closed, set it near the wettest area and give it clear airflow on both sides. Clean the washable mesh before and after every job, because construction dust blinds the coil quickly and cuts output. Do not run it unattended in a space with standing water around the electrical cord, and store it drained and upright.