Dehumidifiers · Guide
The Best Dehumidifier for a Basement
Basements are the single most common reason people buy a dehumidifier: they sit below grade, trap moisture, and turn musty and mold-prone if humidity runs high. For that job you want real capacity — a 50-pint/day unit rated for roughly 4,500 sq ft — plus a way to drain continuously so you're not emptying a tank twice a day. Here's how the three true 50-pint units in our catalog stack up.
Why a basement is the #1 use case
Below-grade walls sit against cool, damp soil, so basements pull in moisture year-round and stay humid even when the rest of the house feels fine. That damp air is what produces the classic musty smell, condensation on cold surfaces, and mold on drywall, joists, and stored boxes. Because the space is large and consistently damp, it needs sustained moisture removal rather than a small room unit. This is a whole-space humidity problem, not a spot fix — which is exactly why capacity and drainage matter more here than anywhere else in the home.
Why 50 pints and continuous drainage
A 50-pint/day unit rated for about 4,500 sq ft has the throughput to actually pull a basement down and hold it there. Capacity alone isn't enough, though: at that removal rate a 1.7-gallon tank fills fast, so you want continuous drainage. All three 50-pint units accept a gravity drain hose to a floor drain. The Midea Cube 50 goes further with a built-in pump, letting it push water up and out to a sink or window — the truly set-and-forget option if you have no floor drain below the unit.
Humidity targets and mold prevention
Mold and dust mites thrive above roughly 60% relative humidity, so the goal in a basement is to hold RH in the 45–55% range. Below that you starve mold of the moisture it needs and the musty smell fades; you generally don't want to push much under 40%. A 50-pint unit with a built-in humidistat lets you set a target and cycle automatically. Pair it with continuous drainage and the system maintains that band on its own — which is what actually prevents mold rather than just reacting to it.
The top pick: Midea Cube 50 (Pump)
The Midea Cube 50-Pint is our best overall for a basement (6.7) and the only unit here with a built-in pump, so it can drain upward to a sink or out a window with no floor drain required. It's Energy Star Most Efficient at 512 W, the quietest of the 50-pint trio at 45 dBA, and adds Wi-Fi/Alexa plus an extendable 4.25-gallon Cube tank for the times you don't hard-plumb it. At around $280 it's the premium option, but the pump and efficiency justify it for a permanent basement install.
Proven and budget alternatives
If you have a floor drain and don't need the pump, the Frigidaire FFAD5034W1 (~$260) is the no-frills workhorse: same 50-pint/4,500 sq ft capacity and 515 W efficiency, just a gravity drain and 1.7-gallon tank. The Vremi 50-Pint (~$220) is the cheapest true 50-pint, but it scores lowest of the three — louder at 51 dBA, thirstier at 570 W, and stock is intermittent. Choose it to save cash; choose the Frigidaire for a proven middle ground.
Our picks for this
Extendable-tank smart Cube — runs efficiently and drains itself
$280
7.4/10
The proven 50-pint workhorse for most American basements
$260
7.2/10
A no-frills 50-pint at the lowest price of the group
$220
5.5/10
FAQ
How many pints do I need for a basement?
For most full basements, a 50-pint/day unit rated for around 4,500 sq ft is the right call. Basements are large and consistently damp, so smaller 20–34 pint units (like the Waykar 34 or Midea Cube 20) are built for a single room and will struggle to pull down and hold humidity across an entire below-grade level.
Do I need a dehumidifier with a pump?
Only if you can't gravity-drain. All three 50-pint units accept a hose to a nearby floor drain. But if the nearest drain is higher than the unit or across the room, the Midea Cube 50's built-in pump can push water up and out to a sink or window — making it fully set-and-forget with no tank to empty.
What humidity level prevents basement mold?
Aim to hold relative humidity in the 45–55% range. Mold and dust mites thrive above about 60%, so keeping RH in the mid-40s to low-50s starves them of moisture and clears the musty smell. Set your unit's humidistat to a target in that band and let it cycle automatically rather than running continuously.
Is a louder or less efficient unit a dealbreaker?
It depends on the basement. If it's unfinished and you rarely spend time down there, the Vremi 50's higher 51 dBA noise and 570 W draw matter less, and the ~$220 price is appealing. If the basement is finished living space or you want lower running costs, the quieter, Energy Star Most Efficient Midea Cube 50 is worth the premium.
See the full ranking
Every dehumidifier we track, scored on moisture removal, noise and energy use.
Best dehumidifiers of 2026