Does a dehumidifier get rid of silverfish?

It removes the condition silverfish depend on, but it is not an insecticide. The University of Minnesota Extension puts silverfish's optimal conditions at 70-80°F and 75-95% relative humidity, and NC State Extension lists drying out damp rooms with a fan or dehumidifier as a core non-chemical control step. Holding a basement or bathroom at or below 50% makes it a poor place to live and breed, but NC State also notes adult silverfish can live two to eight years, so expect the population to decline over weeks and months rather than vanish overnight. Pair the dehumidifier with sticky traps, sealed storage bins and fixing any plumbing leaks.

What humidity kills silverfish and booklice?

Booklice (psocids) are the one moisture pest with clean lab data: in a 2021 Journal of Economic Entomology study by Ocran and colleagues, summarized by the National Pest Management Association, all life stages of four psocid species were killed after 16 days at 50% relative humidity, while colonies kept at 75% grew within 14 days. For silverfish there is no equally precise kill threshold; extension sources describe 75-95% RH as their preferred range, so the practical target is the same one the EPA gives for mold: below 60%, ideally 30-50%.

Will a dehumidifier help with springtails and house centipedes?

Yes, and both are named by Penn State Extension. Its springtail fact sheet calls lowering humidity with air conditioning or dehumidifiers the best way to manage or eliminate springtails indoors, and notes they move in from mulch and landscaping during dry spells in search of humidity. Its house-centipede page lists reducing humidity with dehumidifiers as a control step. Because house centipedes hunt other insects, drying out the silverfish and springtails they feed on removes their food supply too.

Can a dehumidifier bucket attract bugs?

A bucket left full of standing water is the opposite of what you want in a room you are trying to dry out, which is one more reason to run a hose or pump to a drain for pest control. Empty and rinse the bucket regularly if you use one, and clean the filter per the manufacturer's schedule so the unit isn't recirculating dust and debris.

Do moisture absorbers like Eva-Dry or DampRid work for silverfish?

Only in a small enclosed space. A renewable silica unit like the Eva-Dry E-333 is rated for roughly 300 cubic feet, which suits a bookshelf cabinet, closet or storage tote where booklice and silverfish feed on paper and glue. It cannot pull a basement or bathroom down to 50%; that needs a compressor dehumidifier.

Best Dehumidifier for Silverfish 2026: Dry Out Silverfish, Springtails & Booklice

Q: What size dehumidifier do I need for silverfish in a basement?

A 50-pint (DOE-2019) unit for a typical damp basement, ideally with continuous drainage. Pest control means running the unit around the clock for weeks; an Ask Extension springtail answer recommends running fans and a dehumidifier 24 hours a day until the interior dries out, and a bucket-only unit will fill and shut itself off long before that. A built-in pump like the Midea Cube 50 Pump's, or a gravity hose to a floor drain, solves it.

Quick Answer: The best dehumidifier for silverfish in 2026 is the Midea Cube 50 with Pump (MAD50PS1QWT) — a 50-pint unit with a built-in pump, so it can run 24/7 in a basement for the weeks it takes to drive silverfish, springtails and booklice out, without a bucket to empty. Choose the Frigidaire FHDD5034Y1 if you have a floor drain and want a 5-year sealed-system warranty, the AlorAir Sentinel HDi65 if the bugs come up from a crawl space, and an Eva-Dry E-333 for bookshelves and closets. Aim for 50% relative humidity or lower: University of Minnesota Extension puts silverfish’s preferred range at 75-95% RH, and a 2021 lab study found booklice of all life stages died after 16 days at 50% RH.

Silverfish, springtails, booklice, house centipedes and millipedes look like five different problems, but they share one weakness: they need damp air. That makes a dehumidifier one of the few pest tools that works on all of them at once. It is also the most misunderstood one. A dehumidifier is not an insecticide, and nothing on this list kills bugs on contact. What it does is take away the humidity these insects need to survive and breed, slowly and for good. NC State Extension notes adult silverfish can live two to eight years, so the job is measured in weeks of continuous running, not one weekend. That changes which dehumidifier you should buy: drainage and warranty matter more here than in almost any other use.

Our top picks for silverfish and moisture pests

Dehumidifier	Best for	Capacity	Drainage	Price
Midea Cube 50 Pump (MAD50PS1QWT)	Best overall: basements, 24/7 runs	50 pints/day	Built-in pump	~$250-300
Frigidaire FHDD5034Y1	Best warranty, if you have a floor drain	50 pints/day	Gravity hose / 2.7-gal bucket	~$279-320
AlorAir Sentinel HDi65	Best for crawl spaces (springtails, centipedes)	55 pints (AHAM)	Built-in pump, 19.6 ft lift	~$700-900
Midea Cube 20 (MAD20S1QWT)	Best for bathrooms and laundry rooms	20 pints/day	Bucket / gravity hose	~$185-199
Eva-Dry E-333	Best for bookshelves, closets, storage bins	~300 cu ft	None (renewable silica)	~$20-25
ThermoPro TP50 hygrometer	Essential add-on: proves you're under 50%	—	—	~$10-15

Which moisture pest you have, and what humidity stops it

Pest	Where it shows up	What the research says about humidity	Does a dehumidifier help?
Silverfish	Basements, bathrooms, bookshelves, stored boxes	Prefers 70-80°F and 75-95% RH (University of Minnesota Extension)	Yes: drying the room is a core non-chemical step (NC State Extension)
Firebrats	Near furnaces, water heaters, fireplaces, attics	Favors 90°F+ plus humidity (NC State Extension)	Partly: heat is the bigger driver; fix the warm, damp spot
Booklice (psocids)	Books, paper, cardboard, damp pantry goods	All life stages killed after 16 days at 50% RH; colonies grew at 75% (Ocran et al., 2021)	Yes: the clearest evidence of any pest here
Springtails	Basement floors, bathrooms, potted plants, near mulch beds	Require high-humidity environments (Penn State Extension)	Yes: Penn State calls lowering humidity the best indoor control
House centipedes	Basements, crawl spaces, floor drains	Penn State lists reducing humidity with dehumidifiers as a control step	Yes, plus it removes the insects they eat

Moisture pests by the numbers

75-95% relative humidity: the range the University of Minnesota Extension gives as optimal for silverfish, at 70-80°F. A basement holding 65-80% all summer sits right in that zone.
16 days at 50% RH: how long it took to kill all life stages (eggs, nymphs and adults) of four booklouse species in Ocran et al.’s 2021 Journal of Economic Entomology study, as summarized by the National Pest Management Association. Psocids held at 75% RH grew in number within 14 days.
2 to 8 years: how long adult silverfish may live, per NC State Extension, and a female may lay more than 100 eggs over that lifetime. A dehumidifier works by making the space unlivable, not by killing the adults you can see.
Up to 150 young: what a single female house centipede can produce over a lifespan of several years, per Penn State Extension, which lists dehumidifiers among its control steps.
Below 60%, ideally 30-50%: the EPA’s indoor humidity guidance for preventing mold. It doubles as the pest target, because the mold and damp debris that springtails and booklice feed on stop forming in the same range.

1. Midea Cube 50 with Pump (MAD50PS1QWT) — Best Overall for Silverfish

Midea Cube 50-Pint with Built-In Pump (MAD50PS1QWT)

Best overall · 50 pints/day · built-in pump · ~$250-300

Built-in pump pushes condensate up to a sink or out a window, so the unit can run around the clock for weeks with no bucket to empty and no automatic full-tank shutoff.
50-pint (DOE-2019) capacity, rated by Midea for spaces up to about 4,500 sq ft: enough to pull a typical damp basement down to 50%.
App control lets you watch the humidity reading from upstairs, which matters for a room you're avoiding because it's full of bugs.

Silverfish and centipede problems are overwhelmingly basement problems, and basement pest control is a marathon. An Ask Extension answer on springtails recommends running fans and a dehumidifier 24 hours a day until the interior dries out, and any bucket-only unit will fill, shut off and let the humidity climb back the first night you forget to empty it. The pump is what makes the Cube 50 the right tool. Retailer pricing for the pump version has been unusually spread out: BJ’s lists it at $249.99, Sylvane at $269.99 and Slyman Bros at $299, so check two sellers before you buy. For the rest of Midea’s lineup, see our best Midea dehumidifier roundup.

2. Frigidaire FHDD5034Y1 — Best Warranty (If You Have a Floor Drain)

Frigidaire FHDD5034Y1 50-Pint Wi-Fi Dehumidifier

Best warranty · 50 pints/day · gravity hose · ~$279-320

5-year sealed-system warranty versus Midea's standard 1 year, which counts when a unit is going to run nonstop for months.
Gravity drain hose plus a 2.7-gallon bucket; with a floor drain nearby, it runs continuously without a pump.
Rated at 8.8 amps / about 470 watts on Frigidaire's own spec sheet, with auto-defrost down to 41°F.

If your basement has a floor drain within hose reach, you don’t need a pump, and the Frigidaire’s warranty becomes the deciding factor. A pest-control run is the hardest duty cycle a home dehumidifier sees, and Frigidaire covers the sealed refrigeration system for five years where Midea, GE and LG default to one. Retailers currently list it from $279 (Staples) to $287 at AJ Madison against a $319 MSRP. The FHDD5034Y1 replaced the older FHDD5034W1; our Midea vs. Frigidaire comparison covers the two head to head.

3. AlorAir Sentinel HDi65 — Best for Crawl Spaces

AlorAir Sentinel HDi65

Best for crawl spaces · 55 pints (AHAM) · built-in pump · ~$700-900

Built-in condensate pump with 19.6 ft of vertical lift, so water leaves the crawl space without a floor drain.
Keeps running down to 36°F with auto-defrost, where a standard portable unit ices up.
Low-profile body built to sit in a crawl space for years, not a portable that happens to fit.

When springtails, millipedes or house centipedes keep turning up on the first floor with no obvious entry point, the source is often a damp crawl space below it. Penn State Extension notes springtails move from mulch and landscaping toward humidity during dry weather, and a humid crawl space is the nearest humid place. Treating the room where you see the bugs won’t fix that; drying the crawl space does. Seal the vapor barrier first, then set the HDi65 to hold about 50%. Our best crawl space dehumidifier guide covers larger sealed crawls and Wi-Fi versions.

4. Midea Cube 20 (MAD20S1QWT) — Best for Bathrooms and Laundry Rooms

Midea Cube 20-Pint (MAD20S1QWT)

Best for bathrooms & laundry rooms · 20 pints/day · ~$185-199

Real compressor capacity in a compact body, ENERGY STAR Most Efficient recognized per Midea.
Rated for spaces up to about 1,500-2,000 sq ft, far more than a bathroom or laundry room needs, so it pulls the room down quickly after a shower or a load of laundry.
Gravity hose option for a laundry room with a floor drain or utility sink.

Silverfish in a bathroom usually point to steam that never clears. NC State Extension’s first steps are to make sure bathroom ventilation fans actually work and to fix leaky plumbing around sinks and laundry areas. Do those first. If the room still reads above 50-55% an hour after a shower, the Cube 20 is the right size: a compressor unit that actually removes water, unlike the thermo-electric minis sold for bathrooms, which are typically rated at roughly a pint a day or less. Our best dehumidifier for bathroom guide covers quieter and smaller options.

5. Eva-Dry E-333 — Best for Bookshelves, Closets and Storage Bins

Eva-Dry E-333 Renewable Mini Dehumidifier

Best for enclosed storage · renewable silica · ~$20-25

Cordless renewable silica unit rated for about 300 cubic feet: a bookcase cabinet, closet or large storage tote.
No outlet needed while it works; recharge it by plugging it in when the indicator changes color.
No compressor and no noise, so it can live permanently with the books, papers and photos booklice and silverfish feed on.

NC State Extension notes silverfish are drawn to glazed paper, book-binding glue and starch, and booklice feed on the microscopic mold that grows on damp paper. Both problems often live in one cabinet, box or closet rather than the whole room. An Eva-Dry inside that enclosed space does a job the basement dehumidifier can’t reach. It won’t dry a room, so don’t buy it for one. Our best dehumidifier for closet guide compares the larger E-500 and plug-in options.

6. ThermoPro TP50 Hygrometer — The Add-On You Shouldn’t Skip

ThermoPro TP50 Digital Hygrometer

Essential add-on · humidity + temperature · ~$10-15

Shows the room's actual relative humidity, so you know whether you're above or below the 50% target.
Cheap enough to put one in every problem room: basement, bathroom, bookshelf.
A second opinion on the dehumidifier's own built-in sensor, which reads the air right at the unit.

Every humidity threshold in this guide is meaningless without a way to measure it. A dehumidifier’s display shows the humidity at its own intake. Put a hygrometer where the bugs actually are — behind the water heater, on the bookshelf, in the corner of the crawl space access — and check that it holds under 50% for at least two to three weeks. Our dehumidifier humidistat settings guide explains why the two readings often disagree.

How long until the bugs are gone?

Be realistic about the timeline. The best-documented case is booklice: in the Ocran et al. study, 16 days at 50% RH killed every life stage of all four species tested. That is the minimum to plan for. Silverfish are slower. With adults living years and eggs that NC State says hatch in three to six weeks, expect sightings to drop over one to three months of holding the space dry, not disappear in the first week. Sticky traps placed where you’ve seen activity, which NC State recommends for finding infestation hot spots, show you whether numbers are actually falling.

If they aren’t, the dehumidifier is usually losing to a water source: a leaking pipe, a sweating cold-water line, a sump without a lid, or soil graded toward the foundation. Penn State’s centipede guidance covers that list: screen basement floor drains, cover sumps, seal cracks in slabs and block walls, and grade soil away from the house.

How to choose a dehumidifier for silverfish

Plan for continuous drainage. Pest control means weeks of nonstop running. Buy a pump model, or confirm a floor drain is within hose reach, before you buy anything else.
Size for the room the pests live in, not the room you see them in. Centipedes in the living room often come from the basement or crawl space below it. See our dehumidifier size guide for pint ratings by square footage.
Set the humidistat to 45-50%, then verify with a hygrometer. Don’t trust “continuous” mode alone; check the reading where the bugs are.
Match the tool to the space. Compressor units for rooms, crawl-space units for crawls, renewable silica for cabinets and closets.
Remember the mold. Springtails and booklice graze on mold and damp debris. Our best dehumidifier for black mold guide covers clean-up and the same 50% target.

The bottom line

The Midea Cube 50 with Pump is the best dehumidifier for silverfish in most homes: 50-pint capacity and a built-in pump, so it can hold a basement under 50% for the weeks pest control actually takes. Pick the Frigidaire FHDD5034Y1 if a floor drain makes a pump unnecessary and you want its 5-year sealed-system warranty, the AlorAir Sentinel HDi65 when springtails or centipedes are coming up from a crawl space, the Midea Cube 20 for a bathroom or laundry room, and an Eva-Dry E-333 for a bookshelf or closet. Whichever you choose, add a $10-15 hygrometer so you know the space is really dry. For other moisture-loving pests, see our best dehumidifier for dust mites and best dehumidifier for a pantry guides, our best dehumidifier for basement pillar for the full basement field, and if you’re ordering online, check whether Amazon Prime is worth it for dehumidifier shoppers.