The pint number on the box isn't what you think it is
Here's the trap that trips up almost every dehumidifier buyer: the DOE changed the test in 2019, and it made the pint numbers drop. A unit that was rated "70-pint" under the old test is only about a 50-pint under the current one — same machine, smaller number. Manufacturers still market the old-style capacities in places, so you'll see the identical box called both. This tool uses the current DOE 2019 pint rating for every unit, so you're comparing apples to apples. Bigger pints/day = pulls more water and refills/drains less often; match it to how wet the space actually is, not to the biggest number you can find.
Tank vs. continuous drain vs. built-in pump
Every dehumidifier can drain three ways, and it changes how much you babysit it. Tank: it collects water in a bucket you empty by hand — fine for a bedroom, miserable for a wet basement (you'll empty a 50-pint unit two-plus times a day). Gravity drain: attach a hose and let it run downhill to a floor drain — free, but only works if there's a lower drain nearby. Built-in pump: the unit pumps condensate upward and out — into a sink, up a window, across a basement — so it can run continuously anywhere, hands-off. That's why the "set-and-forget" preset weights the pump heavily: on a real humidity problem, the pump is the difference between a set-it-once appliance and a daily chore. Five of the thirteen units here have one.
Why energy factor (IEF) matters more than you'd guess
A dehumidifier that runs in a damp basement can pull power around the clock for months. The ENERGY STAR Integrated Energy Factor (IEF, in liters removed per kWh) is the honest efficiency number, and the spread here is real: from ~1.7 up to 2.20 on the ENERGY STAR "Most Efficient" Waykar. That gap compounds over a season of continuous running into a meaningful chunk of your electric bill — which is exactly why "lowest running cost" leans on it. If the unit is going to run hard, efficiency isn't a nicety, it's the running cost.
Sizing: pints vs. coverage
Capacity (pints/day) is how much water it can remove; coverage (sq ft) is the manufacturer's rated area. They're related but not the same — a big pint rating in a huge open basement can still struggle if the space exceeds its coverage, and an oversized unit in a small damp room just short-cycles. Rough guide: a moderately damp space up to ~1,500 sq ft is fine on a small unit; a wet basement or a whole floor wants a 50-pint (DOE) unit rated for 3,000–5,000 sq ft. Match both numbers to your space, then let the value math sort the rest.
Why we don't just name a winner
"Best dehumidifier" depends entirely on the room and what you're optimizing. A flooded basement wants max capacity + a pump and doesn't care about noise; a bedroom wants the quietest unit at a modest capacity; the bill-watcher wants the highest IEF. One name buries all of that — the Value Score keeps it in your hands, formula in the open right above. Compare Frigidaire vs Midea vs hOmeLabs vs GE vs Honeywell vs Waykar vs LG by the specs that matter to you.
The specs, briefly
Capacity = DOE 2019 pints/day removed (the modern, lower-numbered test). Coverage = manufacturer rated area in sq ft. Energy factor (IEF) = ENERGY STAR liters-per-kWh efficiency; higher = cheaper to run. Built-in pump = pumps condensate upward/out for truly continuous hands-off draining (vs. tank or gravity). Warranty = longest headline warranty in years. Quiet = operating noise in dBA (lower is better — scored inverted).
Pint capacity (DOE Appendix X1, 2019 test) and energy factor (ENERGY STAR Integrated Energy Factor) verified Aug 2026 against the U.S. DOE compliance certification data and the official ENERGY STAR certified-dehumidifier dataset. Coverage area, warranty, operating noise (dBA) and pump status are from manufacturer spec sheets; noise in particular is measured inconsistently across brands and should be treated as approximate. Prices are approximate street prices for the unit only. Some links may be affiliate; that never changes the Value Score — the math runs on published specs, not payouts.