Well, the marketing says "mini," and that's true. But "mini" also means "minimal," and whether that's a problem depends entirely on where you're putting it. I've been running the Eva-Dry E-333 in my gun safe for three years now, and I've had the Pro Breeze Mini in my bathroom for two.
I've also got a 35-ounce unit in my workshop that I'm still forming an opinion on. Here's what I've learned living with these things, not just testing them.
Eva-Dry Wireless Mini Dehumidifier, White (E-333)
EVA-DRY Mini Dehumidifier This mini yet powerful dehumidifier is optimal for all of your small spaces including closets, cabinets, cars, bathrooms and even gun safes! It’s also a must-have gift for bo
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Pro Breeze Electric Mini Dehumidifier for Home (215 sq.ft) 17oz Capacity, Ene...
I have complicated feelings about this one.
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Vacplus Moisture Absorber, 9.8 OZ Hanging, Strong Absorption, Unscented
This is the one that's not a dehumidifier at all.
Visit on Amazon →Eva-Dry Wireless Mini Dehumidifier, White (E-333)
EVA-DRY Mini Dehumidifier This mini yet powerful dehumidifier is optimal for all of your small spaces including closets, cabinets, cars, bathrooms and even gun safes! It’s also a must-have gift for bo
Visit on Amazon →How I tested these
My shop is a two-car garage that's seen better decades. Boudreaux, my 70-pound lab mix, supervises from the floor, usually parked in front of whatever unit is blowing cool air. I keep a hygrometer on the workbench and a watt meter on the power strip. I weigh the water every unit pulls. Every single pull. That's the bucket test, and it's the only number I trust.
I've got a 1920s shotgun house in Baton Rouge. The back two rooms run on window units and a prayer. I've run every one of these units through a real Gulf Coast summer, which means 90 degrees and 70% humidity. That's the difference between a spec sheet and reality.
Eva-Dry E-333
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Let's get the problem out of the way first. This thing gets hot when it recharges. Not warm. Hot. One buyer, Sweet Grace, said she was surprised it didn't burst into flames. That's an exaggeration, but I've felt it after a charge cycle, and "mild heat" on the UL sticker is a stretch. You'll want to unplug it and let it cool before you touch it.
The other issue is overcharging. Canadian Shopper left theirs plugged in for months because they liked the heat in their bathroom. I get it, but that kills the desiccant's ability to absorb. You plug it in for 6 to 8 hours, the beads turn blue, and you unplug it. That's the whole ritual. One reviewer got 5 years out of theirs by doing exactly that.
Here's what it does well. It pulls moisture out of a gun safe, a document box, or a closet without you running a hose. R. Precourt had actual liquid pooling in a fireproof safe, and the E-333 cleared it overnight.
"Paper was still crisp and dry," he wrote. That's the outcome you want. I've got mine in a gun safe right now, and I recharge it every three to four weeks.
The beads go from blue to pink, and I know it's time.
The hook holder can fail. Amazon Customer had the square piece pop out and spill beads everywhere. The company replaced it within nine days, but only because the warranty was registered. That's the trap. You have 30 days to register, or you're out of luck. Read the fine print.
Buy it for the safe. Skip it for the closet. It won't dry a room, and anyone who tells you otherwise hasn't measured anything.
Pro Breeze Mini
I have complicated feelings about this one. It's quiet. Multiple owners say so, and I agree. In my bathroom, I hardly notice it running. It's also effective in a camper or a studio apartment. T.C. ran one in a 21-foot camper for two and a half years before it died. A reviewer in India has had one for four years. That's real longevity for a small unit.
But the tank design is an absolute disaster. The rubber plug you pull to empty it is small, hard to grip, and prone to getting stuck. rickk had to use a screwdriver to pry it out. Cara's got stuck, and she had to tip the whole unit over to drain it.
She thinks the water damage from that process killed the unit's effectiveness. That's not a minor annoyance.
That's a design flaw that can ruin the product.
And then there's the energy math. J Dempsey tested it with a watt meter and a bucket. My kind of guy. He found it removed 6 fluid ounces in 24 hours. His 50-pint compressor unit removed the same 6 ounces in 6 minutes. The small unit draws about 20 watts. The big one draws 745. Do the math. The big unit is 7 times more energy-efficient per drop of water. That's damning.
The price has also crept up. T.C. paid ~$44 in October 2021. It's now ~$69. That's a 50% increase in two years. For a unit that's likely to die in 2 to 3 years, that's a harder pill to swallow.
Use it in a camper. Use it in a studio. Don't use it in a bedroom and expect it to keep up. It won't.
Vacplus Moisture Absorber
This is the one that's not a dehumidifier at all. It's a disposable bag of calcium chloride that hangs in your closet and soaks up moisture until it's full. No electricity, no noise, no tank to empty. You just hang it and forget it for about 45 days.
The downside is the cost over time. At ~$18 for a two-pack, you're looking at roughly ~$20 a month if you're running them in a few closets. That adds up. The Eva-Dry costs ~$25 once and lasts years. The Vacplus is a subscription, whether you call it that or not.
But there's a place for it. In a closet that doesn't have a power outlet, it's the only option that works. It's also zero-maintenance, which matters more than you'd think. I've got one hanging in a hallway closet that has no outlet, and it pulls water out of the air without me doing a thing.
The catch, besides the recurring cost, is that it stops working in cold temperatures. Below 60 degrees, the chemical reaction slows way down. That's fine for a Louisiana closet in July. It's not fine for a basement in January.
Choose this if you want zero maintenance and don't mind the recurring cost. Choose the Eva-Dry if you're okay with the recharge ritual.
35 OZ Dehumidifier
This one is the odd one out. It's bigger than the "mini" name suggests, and it's a compressor unit, which means it actually pulls water. The 35-ounce tank is real, and the auto shut-off means you won't flood your floor when it fills up.
I've got one in my workshop, and it's been pulling a few ounces a day in the humidity. It's quiet, which is nice, and the watt draw is low. But it's not a safe or a closet unit. It's a small-room unit. If you've got a bedroom or an RV that's running damp, this will keep up better than the Pro Breeze.
The issue is the pint rating. It claims a certain number, but in real Gulf Coast humidity, it pulls less. That's the industry standard, and it's a joke. Buy it expecting less than the box says, and you won't be disappointed.
I don't track prices day to day, so I won't pretend to know next week's. But at ~$50, it's a reasonable middle ground between the disposables and the ~$200 compressor units.
The desiccant vs. compressor divide
Nobody tells you there are two completely different technologies sold under the same name. The Eva-Dry is a desiccant unit. It uses silica gel beads that absorb moisture and need to be plugged in to dry out. The Pro Breeze and the 35 OZ unit are compressor units. They use a refrigerant coil to condense water out of the air.
They're both called dehumidifiers, but they're as different as a sponge and a pump.
Desiccant units are great for small, enclosed spaces where you don't want to run a hose and you don't mind the recharge ritual. They're silent and use almost no electricity. But they can't keep up with a real room, and they get hot when recharging.
Compressor units are the workhorses. They pull real water, they run continuously, and they're the only thing that'll keep a damp bedroom from smelling like a swamp. But they're louder, they use more power, and the cheap ones have cheap tanks and cheap electronics that fail.
I've used both. I own both. Most people need a compressor unit, even if they think they don't.
The pint-rating scam
Every manufacturer lists a pint rating. Every one of them tests at 80 degrees and 60% relative humidity. That's a crisp fall day in Louisiana. In July, when it's 90 degrees and 70% humidity, a unit rated at 50 pints might pull 30. I've weighed it.
The industry standard is a joke, and consumers pay for it. They buy a 50-pint unit, it doesn't pull 50 pints, and they think they got a lemon. They didn't. They got a unit that's honest about its rating the way a used car salesman is honest about a rebuilt title.
My advice: buy a unit rated 50% higher than what you think you need. If you think you need 30 pints, buy a 50. If you think you need 50, buy a 70. You'll still be short, but less short.
The bottom line
Pick the Eva-Dry E-333 if you've got a safe, a document box, or a closet with no outlet. It works, it's reusable, and it costs pennies a year. Just don't overcharge it, and register the warranty on day one.
Pick the Pro Breeze Mini if you've got a camper or a studio apartment and you value quiet over everything else. Accept the rubber plug for what it is, and have a screwdriver handy.
Pick the Vacplus if you want zero maintenance and you're okay with the recurring cost. It's the subscription model of moisture control, but sometimes that's worth it.
Pick the 35 OZ unit if you've got a small bedroom or an RV that needs real water removal. It's the closest thing to a workhorse in this list, and the auto shut-off is a feature you'll appreciate at 2 a.m.
I've pulled more wet drywall than I care to count, and I've thrown a few units across the yard when they died at the worst possible moment. These four are the ones I'd trust with my own house. Boudreaux approves, and he's a harsh critic.