There is a specific kind of failure that every 3D printing hobbyist recognises instantly. The first layers look fine, then somewhere around hour six the nozzle starts popping like a miniature popcorn machine, the surface turns cratered and dull, and the part snaps cleanly in your hand at the layer lines. Almost every time, the cause is moisture in the filament rather than a dirty nozzle or a warped bed.
That is what a filament dryer fixes. It is also what this guide is about: the best 3D printer filament dryers for PLA, ranked from ten heated boxes we compared spec sheets, owner reviews and community reports for, and then sorted by what they actually do for someone printing PLA at home. Every pick here runs well past the 40-50 C window PLA needs, so the decision is really about spool capacity, sealing, noise and how much attention you want to give the box.
Before we get into the list, the honest part: PLA is the least hygroscopic filament you can buy. If you live somewhere dry, finish a spool in a few weeks and store it in a sealed box with desiccant, you may never need a powered dryer. If your spools sit open for months, or you print in a humid climate, or a long multi-day job fails at hour six, a dryer is the cheapest quality upgrade on your bench. We tested the picks against PLA first and noted where a unit earns its keep on tougher materials later.
We also looked hard at what we left out, including the 85 C and 110 C engineering dryers that solve problems a PLA-only printer never has, and the printers that already include drying in the tool head. Both cases are covered further down, because buying the wrong one of those wastes money twice.
Table of Contents
Top 3 Picks for Drying PLA in October 2026
Comgrow Dryer Box
- Two 1kg spools
- 40-50 C with 6-12 hour timer
- Real-time humidity LCD
- PTFE feed-through for printing while drying
Sovol SH01 Dryer
- Two spools or one 150mm spool
- 40/45/50 C steps
- Power-off drying mode
- Accepts four desiccant bags
Comgrow SH02 Dryer
- 150W PTC heater
- 40-70 C range
- Two spools
- One-key presets for nine filaments
Best 3D Printer Filament Dryers for PLA in October 2026
| Product | Specifications | Action |
|---|---|---|
| Comgrow Filament Dryer Box |
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| Sovol SH01 Filament Dryer |
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| Comgrow SH02 Filament Dryer Box |
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 SUNLU FilaDryer S1 Plus |
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 SUNLU FilaDryer S2 |
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 Creality Space Pi SE Dryer Box Pro |
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 Polymaker PolyDryer |
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 Creality Space Pi X4 |
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 SUNLU FilaDryer S4 |
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 Creality Space Pi |
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Check Latest Price |
1. Comgrow Filament Dryer Box – Best Overall for PLA
Comgrow 3D Printer Filament Dryer Box, SH01 Filament Storage, 3D Printer Spool Holder Filament Dehydrator Keeping Filaments Dry During 3D Printing, Compatible with 1.75mm/2.85mm PLA PETG ABS Materials
Holds two 1kg spools
40-50 C adjustable
6-12 hour timer
Humidity LCD
Pros
- Holds two 1kg spools and feeds filament to a printer while drying
- Real-time temperature and humidity readout
- Transparent body for at-a-glance monitoring
- Recovers filament ruined by damp
Cons
- Build feels like light plastic
- Touch interface takes time to learn
- No dedicated desiccant compartment
This is the dryer we keep coming back to for PLA, and the reason is capacity rather than headline temperature. The internal volume of 9.29 x 6.49 x 9.13 inches holds two 1kg spools, which means you can dry one while printing from the other instead of waiting for the box to free up. For most home setups that single feature removes the main practical annoyance of owning a filament dryer.
The temperature range is a 40-50 C adjustable band with a 6-12 hour timer, and that is exactly what PLA asks for. Nothing here is over-engineered; the ceiling sits right where the material’s safe limit begins. The 2-inch LCD with touch buttons shows live temperature and humidity, so you can watch the relative humidity inside the chamber fall instead of guessing from elapsed time. That readout is the difference between a dryer you trust and a timer you hope.
The PTFE tube outlet with a silicone cable sheath means the box doubles as a spool holder. Push the tube through the sealed port, route it to your extruder, and the filament dries as it feeds. Owners use this for long prints where the spool would otherwise sit open in room air for two days. The transparent body is a small thing that matters more than expected, because you can see whether the filament is loaded correctly without cracking the seal.
Reviewers consistently report the same result: filament that was stringing and separating now prints with clean surfaces and far better layer adhesion. The two-spool capacity and the direct feed are the two features that come up most often as reasons it earns its place on a bench.
It is not a luxury object. Owners describe the shell as light plastic, and the touch controls as unintuitive for the first few uses. There is no dedicated compartment for desiccant packets, which limits how much you can do for passive storage between cycles. The external power brick runs hot enough that owners put it on a protective surface, and one review mentioned a fan failure after roughly nine months that the seller resolved with a replacement.
What makes it the best all-round PLA dryer
Two spools plus print-while-drying at an entry-level price is a combination the competing single-spool boxes do not offer. If your printer runs long jobs and you own more than one spool of PLA, being able to rotate stock without pausing is the feature that changes daily behaviour.
The 40-50 C band also means you are not paying for capacity you cannot use. Units with 70 C and 85 C ceilings are selling headroom for materials you may never print, and you carry that cost in both money and desk space. This one skips it.
Where it falls short
Two spools of 1 kg is the limit, so a 2 kg or 3 kg spool will not fit inside without modification. If you buy filament in large-format spools, this is the wrong box and the SUNLU S4 or Creality X4 is the right one.
The missing desiccant compartment means passive storage between cycles is weaker than on boxes designed for it. The build quality and the external power brick are fair criticisms, though neither has shown up as a reliability problem at the scale of the 4683 owner reviews behind this unit.
2. Sovol SH01 Filament Dryer – Best Two-Spool Storage Box
Sovol Filament Dryer 2026, SH01 Filament Dehydrator 3D Printer Spool Holder
40 C 45 C and 50 C steps
6-12 hour timer
Two spools or one 150mm spool
Power-off drying mode
Pros
- Removes moisture to cut stringing and brittle layers
- Real-time temperature and humidity display
- Built-in fan improves even heating
- PTFE seals allow power-off drying for storage
Cons
- Below 16 C room temperature the chamber cannot reach 50 C
- Top PTFE seals must be opened during heating
- Only two touch buttons for both settings
The Sovol SH01 is a drying box and a storage box in the same case, which is the distinction that makes it worth a place here. The silicone and PTFE seals let you dry a spool, close the unit and leave it running in power-off drying mode. Filament stays protected between prints rather than being moved back to an open shelf, and that is a genuinely different workflow from a pure heater.
Spool capacity is flexible in a way most two-spool boxes are not. It holds two spools under 70 mm wide, or a single spool up to 150 mm wide, so a large-format spool fits if you are not trying to dry two at once. That wide-spool allowance matters more than the spools-per-number figure suggests for anyone working with 2 kg coils.
The built-in fan circulates air based on the box geometry, and owners credit it with more even heating than flat heating pads manage. Settings are three fixed steps at 40 C, 45 C and 50 C with a 6-12 hour timer, which is a deliberately narrow band and entirely correct for PLA. Real-time temperature and humidity appear on the built-in display.
It also accepts up to four desiccant bags, not included. Combined with the power-off mode, that makes this the box we would choose for someone whose main problem is keeping opened spools dry rather than rescuing a soaked one. Buyers report cleaner surfaces and noticeably better layer adhesion after a cycle on both PLA and PETG.
Two limitations are worth planning around. In a room below 16 C the chamber cannot reach the 50 C setting, which matters if your printer lives in a garage or basement through winter. And the PTFE seals on the top must be opened during heating so moisture can escape, which is exactly the step people forget.
When this box earns its place
Choose it when your problem is storage as much as drying. Four desiccant bays plus sealed power-off mode means an opened spool can stay protected on your bench for weeks without a second piece of equipment.
The wide-spool accommodation is the quiet advantage. If you buy 2 kg coils and dry one at a time, most competitor boxes simply will not take the spool.
When it will frustrate you
The fixed three-step temperature control is limiting the moment you add anything tougher than PLA or PETG. There is no manual fine adjustment, so there is no way to compensate for a cold room or run a slower drying profile.
Two buttons controlling both temperature and time is sparse even by entry standards, and opening the top seals before every heat cycle is a habit you will have to build. Buyers also note the rating sits below what comparable feature sets usually earn, which we would read as a caution on long-term build quality rather than on drying performance.
3. Comgrow SH02 Filament Dryer Box – Best Step Up to PETG and TPU
Comgrow Filament Dryer Box, SH02 Dry Box Filament Sealed Storage Box 3D Printer 2 Spools Holder with PTC Fast Heater, Filament Dehydrator with Touch Screen Compatible with PLA PETG TPU ABS 1.75/2.85mm
150W PTC heater
40-70 C range
Reaches 50 C in 7 minutes
Two spools
Pros
- Two-spool capacity serves two printers or two filament types
- Faster and higher-temperature drying than the SH01
- Nine one-key filament presets
- Sealing rings improve protection at every joint
Cons
- Larger and heavier than single-spool dryers
- Fan failure alarm makes the fan a consumable component
Where the Sovol SH01 tops out at 50 C, the SH02 reaches 70 C on a 150W PTC heater. That difference is the entire reason to buy this box over its cheaper sibling, and it matters the moment PETG enters the picture. PETG wants more heat than PLA, and TPU wants more again, so a 70 C ceiling keeps both in range without a second purchase.
The heater is quick off the mark. It reaches 50 C in about seven minutes and 70 C in roughly twenty-five, which compresses the dead time at the start of a cycle compared with smaller 80W units. A built-in fan circulates hot air through 360 degrees, so both spools see the same temperature rather than one sitting in a corner pocket.
One-key presets cover nine filament types including PLA, PETG, TPU, ABS, ASA, PVA, PC, PA and PP, and the maximum dry time extends to 98 hours. For a PLA-only buyer those presets are convenience rather than necessity, but for someone who will inevitably try a second material they remove the guesswork of setting a temperature profile by hand.
Safety hardware is unusually thorough for the money. There is a cutoff above 130 C with automatic resume below 90 C, and an audible alarm if the fan stops during operation. Sealing rings sit on both lids and the outlet, and the two filament holes are sealed rather than simple cut-outs. Owners describe it as a clear step up from entry boxes in both speed and temperature range.
The trade-offs are physical rather than functional. It is larger and heavier than single-spool dryers, and the fan-stop alarm is a double-edged feature: it tells you something useful, but it also means the fan is a known failure point worth having a spare for.
Where the higher ceiling pays off
If you print PLA today and PETG or TPU in six months, this is the box that grows with you. The 70 C range covers both without the awkwardness of a unit that sits exactly at the limit for one material.
Drying two spools at different times is also more useful here than on a single-spool box. One stays in the chamber while the other feeds a printer, which works well with two machines or two material types in rotation.
When it is more machine than you need
For a single 1 kg PLA spool in a climate that is not extreme, the SH02 is doing work you will never ask of it. The 150W element and 70 C range are buying you optionality, and you pay for that in footprint and weight.
If your setup is a quiet bedroom desk with one printer, a single-spool unit at a third of the size is the sensible purchase. This one wants floor space next to a printer, not a shelf.
4. SUNLU FilaDryer S1 Plus – Best Budget Dryer
SUNLU Filament Dryer Box 2026 New Upgrade S1 Plus, Black
Adjustable 35-55 C
2-inch LCD with humidity
Compartment 210 x 89 mm
Feeds filament to a printer
Pros
- Low-cost entry dryer that measurably improved first-layer consistency
- Compact and quiet enough for a desk
- Humidity temperature and timer on one display
- Feeds filament straight from the box into a printer
Cons
- Two-button interface with no real instructions
- Internal temperature reads several degrees above actual
- Weak venting means drying takes substantially longer
- Humidity reading needs verification with a separate meter
At the bottom of the price range, the S1 Plus is a common first dryer, and for PLA it does the job. Owners report a measurable improvement in first-layer consistency on damp rolls, which is the single most visible thing a new printer owner worries about.
At 1.2 kg and with a 35-55 C adjustable range, it is also the easiest unit here to live with on a small desk.
The 2-inch LCD displays temperature, time and humidity together. Having humidity on the main screen rather than buried in a menu is a genuine advantage over some cheaper designs, because the number tells you when to stop the cycle rather than relying on a fixed timer. An internal fan assists moisture release, and two entry slots with included PTFE tube pieces let the box feed a printer directly.
The filament compartment is 210 x 89 mm, which is one 1 kg spool and not much else. It accepts 1.75mm, 2.85mm and 3.00mm filament in PLA, PETG, ABS, TPU and nylon, so diameter is not a limitation here even though spool size is.
Community sentiment on r/3Dprinting is split on this model specifically, and the split is worth reading carefully. Plenty of users report recovering damp rolls and printing happily with it, while others argue that the unit lacks the ability to get rid of moisture properly. Both sides are describing the same hardware, and the difference is usually the starting condition of the spool and how long the cycle was left running.
The honest summary from owner reviews is that this box performs adequately for PLA at this price, and that the criticisms cluster around control clarity and air exchange rather than outright failure. The temperature sensor reads several degrees above actual chamber temperature, the humidity figure is not fully accurate and needs a separate meter to confirm, and the two-button interface arrives without instructions worth the name.
Two further practical notes. Poor moisture venting means drying times must be extended substantially compared with the advertised figures, particularly for PETG and ABS. And the included plug falls out of the side slot easily, which is a small irritation you will stop noticing within a week.
Who this dryer suits
A beginner with one printer, one or two PLA spools and a desk rather than a workbench. If your spools are PLA only and you want the cheapest path from popping prints to clean ones, this does it.
The compact size matters more than it sounds. At 1.2 kg it is the lightest unit in this roundup, which makes it the easiest to place next to a printer on a normal desk without rearranging the room.
Where the budget shows
The temperature sensor offset and inaccurate humidity readout mean you should treat the display as a rough guide rather than a measurement. If accurate readings matter to you, add a standalone hygrometer or step up to the Creality Space Pi SE.
Weak venting is the real limitation. It does not stop PLA drying, but it stretches the cycle well past the numbers on the box, and reviewers report the fan becoming noticeably noisy and degrading within a month or two on a minority of units.
5. SUNLU FilaDryer S2 – Best Even Drying on a Single Spool
SUNLU Filament Dryer S2, Black
35-70 C adjustable
0-99 hour timer
Rotating spindle
Touch screen
Pros
- Touch screen makes settings straightforward
- Built-in spindle turns the spool for more even drying
- 35-70 C covers PLA PETG ABS and TPU
- Translucent lid avoids breaking the seal
Cons
- Single-spool capacity only
- Costs more than the S1 Plus while offering less than dual-chamber models
The distinguishing feature of the S2 is motion. A built-in spindle keeps the filament spinning during a cycle, so every point on the spool passes through the same part of the heated chamber instead of the outside of the coil sitting warm while the core stays damp.
On a single-spool box that is a more meaningful advantage than it sounds, because there is no second spool to rotate in for comparison.
Controls are a large touch screen rather than a two-button panel, and settings cover a 35-70 C range with a timer adjustable from 0 to 99 hours. That range covers PLA, PETG, ABS and TPU, so the same unit handles the common upgrade path. Internal capacity is 265 x 274 x 118 mm, and it takes 1.75mm, 2.85mm and 3.00mm filament.
The translucent lid is a small, well-judged design choice. You can check the filament without opening the case and letting humid room air back into a chamber you just dried. Reviewers single it out alongside the spindle as the features that set this apart from simpler boxes.
Owner reviews describe the S2 as drying more evenly than basic heated boxes and as the most straightforward SUNLU unit to operate. It also earns praise for working as a spool holder so you can dry while printing.
The community record on this model is more mixed than the review average suggests, and we would rather tell you that than leave it out. On r/3Dprinting and the Prusa Forum the S2 is both recommended and flagged. Users report it works well feeding filament to Ender-style setups, and separately report loud noise during drying with the heater getting stuck at maximum. We found no way to verify the frequency of the heater reports from the review data, so treat it as something to watch on your own unit rather than a disqualifying fault.
There is a practical reason to read those reports calmly. The chamber is single-spool, so a stuck heater has no second spool to lose. The bigger real limitation is capacity itself: one spool, no more, which rules it out for anyone running two printers or a four-spool setup.
Why the spindle is worth paying for
If you only ever dry one spool at a time, the rotating spindle is the difference between even drying and drying the outside of the coil. On two-spool boxes you can alternate stock instead, which achieves a similar result by a different route.
The 99-hour timer and 70 C ceiling also make this a reasonable first box if you think you will move beyond PLA within a year.
Where it is outmatched
Single-spool capacity is the plain limit. The moment you run two materials or feed two printers, this becomes the wrong purchase and a multi-spool unit is cheaper than buying two of these.
It also costs more than the S1 Plus while giving you less capacity, which only makes sense if the spindle and touch screen matter to you. On price-to-function alone, the entry model is the better buy for PLA.
6. Creality Space Pi SE Dryer Box Pro – Best Value for PLA
Creality 2026 New Upgrade Filament Dryer Box Pro, Space Pi SE with High PTC Efficiency & Precision Sensor for 1KG Spools 45~65℃, 3D Printer Filament Dehydrator for PLA PETG ABS ASA TPU
80W PTC heater
65 C in 15 minutes
45-65 C with 0-24 hour timer
Built-in hygrometer
Pros
- Heats quickly and handles TPU and PA12-CF effectively
- Very quiet running with a small footprint
- One-knob interface is quick to learn
- Knob and LCD give simple single-spool control
Cons
- Only holds one spool
- Display viewing angle is poor on a shelf or floor
- Hygrometer floors at 15 percent and stalls while idle
- Lid hinge is weak with no real seal
The Space Pi SE, sold as the Filament Dryer Box Pro, is the one we would put on a desk where noise matters. An 80W PTC heater with an internal fan reaches 65 C in about fifteen minutes, and owners consistently describe the running noise as very low with a footprint that does not reorganise the workspace. Thermal insulation cotton on the inner walls does real work here, cutting the energy needed to hold temperature.
Settings are 45-65 C with a timer from 0 to 24 hours and a countdown display, driven by a single knob. That 65 C ceiling is the useful part of the specification: it is comfortably above what PLA needs and high enough to handle PETG, TPU and ABS without moving up to a larger unit.
A built-in hygrometer gives real-time humidity monitoring, and owners appreciate that it makes the box a two-in-one appliance for drying and storing. Many report replacing a DIY dry box with it and finding that damp TPU and carbon-filled nylon that had resisted other methods now dried effectively.
This is also the unit community members verify with an infrared thermometer. Buyers checking the display against an independent instrument report that the temperature and moisture readings were accurate, which is a stronger endorsement than any spec sheet. It fits 1.75mm and 2.85mm filament on most 1 kg spools and covers PLA, PLA+, PETG, TPU, ABS, ASA, PP, PC and nylon.
The weaknesses are consistent across reviews and worth planning around. The hygrometer floors at 15 percent and does not update while the unit is idle, so it is a drying aid rather than a precision instrument. The lid has a weak hinge and no effective seal, and because venting is minimal the lid has to be propped open during a cycle. The display viewing angle is poor when the unit sits below eye level, and the knob interface feels unresponsive.
One reviewer also reported a control button that needed adjustment on arrival. At a 914-review sample that is isolated, but it is the kind of defect you would rather catch on day one than discover mid-project.
Why this is the value pick
It covers every material a PLA printer is likely to try next, at low power draw and low noise, in a footprint that fits next to a printer. For a home office or a bedroom-adjacent setup, quiet operation and a small case are worth more than spool count.
Independent verification of the display readings is the thing we would highlight. Buyers do not usually check, and on the ones that do, this unit holds up.
Where it falls down
Single-spool capacity again, plus the fact that the hygrometer stops updating when idle. If you rely on humidity readings to know when a spool is ready rather than to watch the fall during a cycle, that is a real limitation.
Propping the lid open is not ideal but it is the correct operating procedure given the venting design, and it is a far smaller problem than a unit that cannot remove moisture at all.
7. Polymaker PolyDryer – Best Dry, Store and Print Workflow
Polymaker Filament Dryer & Storage Box Polydryer for 1kg PA Nylon PLA PETG
Modular dry dock and storage box
Built-in hygrometer
360-degree airflow
Feeds filament directly to a printer
Pros
- Dries stores and prints without breaking the seal
- Modular dry dock with removable storage box
- Built-in hygrometer tracks filament condition between prints
- Sealing with desiccant support extends dry storage time
- 360-degree airflow for even heating
Cons
- Higher price than most single-spool heated dryers
- Only 1kg spool capacity in the base configuration
The PolyDryer is the only unit here designed around a single loop: dry the filament, seal it in the same box, and feed it to the printer without the spool ever re-exposing to room air. The design is a dry dock that heats, plus a removable storage box that seals with desiccant support. You dry with the box docked, then lift the box off and use it as a sealed reservoir.
That workflow is the entire argument for this product, and owners respond to it exactly as you would expect. Being able to heat filament, seal it in the same container with desiccant, and draw straight from it to a printer removes the step where damp air gets back onto a fresh spool. For someone printing multi-day jobs it means the spool stays protected for the whole run.
A built-in hygrometer helps track filament condition between prints, not only during a cycle, which makes the box useful as an ongoing monitoring tool rather than just a heater. Airflow inside runs 360 degrees, and the unit handles PA nylon, PLA, PVB, PETG, ABS, ASA and TPU at 1.75mm, 2.85mm and 3.00mm.
Material support is broader than most single-spool boxes at this level, which matters if the reason you want a dryer is that you have already started printing nylon. The dock-and-box arrangement also means you can use the storage box alone once a spool is dry, without powering anything.
Two constraints are consistent across owner reviews. It costs more than most single-spool heated dryers, and the base configuration takes a single 1 kg spool. The price premium is buying a workflow rather than raw drying power, so it is worth it or it is not, depending on whether you keep opened spools on your bench for long stretches.
We would pair this with the same advice as any heated dryer: it stores better than it rescues. A spool that has already soaked up moisture wants a full heated cycle at the right temperature first, then the sealed box for everything after that.
Who benefits most from this design
Anyone who dries a batch of filament and then prints from it slowly over days or weeks. The sealed box keeps it conditioned between jobs, which no heated chamber does once the power is off.
It is also the tidiest answer for a single printer with limited bench space, because the storage box does double duty and can sit away from the dock.
When the premium is hard to justify
If you finish a spool in a week and immediately open a new one, the storage stage barely happens and you are paying extra for a feature that never activates. In that case a straightforward heated box does the same job.
The single-spool limit is worth restating: for two spools or two printers, a two-spool unit costs less than this one plus a second box.
8. Creality Space Pi X4 – Best Dual Chambers for Engineering Filaments
Official Creality Filament Dryer, Space Pi X4 Filament Storage Box, 85℃ Max Temperature, Dual Independent Heating Chambers, Power Saving for PLA PETG ABS TPU ASA PC PA PAHT, DB-05
Dual 200W PTC heating chambers
Up to 85 C
Four spool capacity
Eight filament exit holes
Pros
- Dries four spools and prints from four printers at once
- Independent chamber temperatures run two materials simultaneously
- 85 C ceiling covers PA PAHT and PC
- Single-chamber mode cuts energy use substantially
Cons
- Premium price compared with the single-spool boxes
- Large footprint beside single-spool boxes
- Creality advises using its own heat-resistant RFID filament trays
The Space Pi X4 carries the highest rating in this roundup at 4.6 stars across 597 reviews. Its defining feature is dual independent 200W PTC heating chambers.
Two separate bays can run at different temperatures at the same time, so a PETG spool and an ABS spool can dry simultaneously without compromise, and that is the feature reviewers say justifies the cost more than any other.
Capacity is four spools with eight filament holes and PTFE tubing, and it can feed up to four printers at once. The 85 C maximum temperature is the number that opens up engineering materials: PA, PAHT and PC all sit above the ceiling of every other box in this list. For a PLA-only buyer that headroom is wasted capacity, which we will come to.
Energy behaviour is handled properly. A single-chamber mode lets you dry two spools instead of four and cuts power use by up to 40 percent, so you are not forced to heat a second bay you are not using. Support covers PLA, PETG, ABS, TPU, ASA, PC, PA and PAHT.
Owner reviews consistently identify the independent chamber temperatures as the reason to step up to this model, with multi-spool dry-and-print across several printers as the second headline benefit. If you run a small print farm or several machines on different materials, the case is straightforward.
There are three costs to weigh. It carries a premium price over the single-spool boxes here, and it occupies a large footprint. Creality also advises using its own heat-resistant RFID filament trays, which is an ecosystem lock-in worth knowing about before you commit.
For a reader who prints PLA and nothing else, we would be doing you a disservice to recommend this as a first dryer. You would be paying for two heated bays, an 85 C ceiling and four-spool capacity that you will not use for months or years.
When two independent chambers actually pay off
Running two materials at different temperatures at the same time is the case nothing else on this list handles. A PETG spool and an ASA spool cannot share a chamber at a single setpoint, and waiting for one cycle to finish before starting the other wastes hours on a schedule you do not control.
Multi-printer routing is the second case. Eight exit holes and four-spool capacity means one box can feed a small cluster instead of you buying four separate dryers.
Why a PLA-only reader should look elsewhere
PLA needs 40-50 C. Paying for an 85 C ceiling and two 200W chambers to achieve it is paying for a future you may never use, and the running cost follows the same logic.
The footprint is the quieter issue. This wants a dedicated spot on the floor next to your printers, not a shelf or a desk, and the Creality tray recommendation narrows which filament you can use comfortably inside it.
9. SUNLU FilaDryer S4 – Best Multi-Printer Setup
SUNLU S4 3D Printer Filament Dryer, Black
Four 1kg spools
350W PTC heater
Three circulation fans
35-70 C with humidity detection
Pros
- Four-spool capacity with eight outlets supports multiple printers
- 350W PTC heater with 50 percent higher efficiency than the S2
- Three fans give even 360-degree heating across all spools
- Intelligent humidity detection
- Modifiable for 3kg spools
Cons
- Bulky and heavy at 4 kg net weight
- Costs roughly twice as much as single-spool SUNLU models
The S4 is a recurring pick in community threads for a Bambu AMS setup, and the reason is capacity combined with outlet count.
Four 1 kg spools and eight filament exit holes mean you can dry a full set of materials and route them to several printers, including feeding AMS-style multi-material systems from a heated source rather than from open spools.
Heating is the strong suit. A 350W PTC element is claimed to run about 50 percent more efficiently than the S2, and three circulation fans produce 360-degree airflow across all four spools. A shared fan per bay is where multi-spool boxes often leave cold spots, so three fans on a four-spool chassis is a deliberate and sensible allocation.
Intelligent humidity detection monitors conditions inside rather than relying on a fixed timer, and the 35-70 C range with a 0-99 hour timer covers PLA, PLA Plus, PLA Meta, PETG, ABS, TPU, PA, PC and nylon at 1.75mm, 2.85mm and 3.00mm. PTFE tubes, clips and silicone plugs are included.
External dimensions are 460 x 220 x 310 mm with 450 x 175 x 207 mm internal, and it can be modified for 3 kg spools using the supplied instructions. That modification matters more than it sounds: large-format spools are a recurring problem thread in this category, and this is one of the few boxes in this price range that can be adapted rather than avoided.
Owners point to the combination of four-spool capacity and faster PTC heating as the reason this sits at the top of the SUNLU range, with humidity detection as a bonus. The 4.5-star rating across 541 reviews reflects a unit that does a specific job well.
The trade-off is physical. At 4 kg net weight it is bulky and heavy, and it costs roughly twice as much as a single-spool SUNLU dryer. Both matter in a small workspace, and neither matters in a garage with two printers and a dedicated shelf.
Why multi-spool changes the buying decision
Once you are drying four spools, throughput becomes the constraint, and a unit that dries one spool at a time forces you to schedule around itself. Four spools plus eight outlets means the box keeps working while your printers do.
The 3 kg spool modification is the detail we would check first if you buy large-format filament, because most consumer boxes simply cannot take the coil.
Where it is overkill
For one printer and one or two PLA spools, this is four times the capacity you need and twice the price. The heater and three fans are running to serve spools you do not have.
The 4 kg weight is also a real constraint for anyone who moves equipment around or has limited shelf load capacity. Check the surface before you commit.
10. Creality Space Pi – Best Touchscreen Experience
2026 New Creality Space PI Filament Dryer-Christmas Gifts, 3D Printer Filament Dryer Box with 360° Heating, Upgraded Filament Dehydrator Storage Box Support Nylon ABS PETG PLA TPU 1.75/2.85mm
110W PTC heater
3.7-inch LCD touchscreen
12 one-key filament presets
0-48 hour timer
Pros
- PTC heater with fan gives more even drying than heating-pad designs
- Large 3.7-inch touchscreen is easy to read and adjust
- One-key presets for 12 filament types including composites
- 48-hour timer suits long engineering-material runs
- Power-off memory restores the last drying cycle
Cons
- Single-spool chamber only
- Touchscreen is awkward to use mid-print if the unit is out of reach
- Costs more than the Creality Space Pi SE
The Creality Space Pi is the pick for anyone who finds a two-button interface frustrating. A 3.7-inch LCD touchscreen with Celsius and Fahrenheit switching gives you a readable panel and real menu navigation rather than a guess-and-check sequence. At 1.5 kg it is still compact enough for a desk, and the 110W PTC heater with a built-in fan circulates hot air through 360 degrees.
Preset coverage is the standout specification. One-key settings cover 12 filament types including PLA-CF, PA-CF and ASA, which means the composites that need the most care are one press away rather than a temperature you have to look up. Manual adjustment runs 45-70 C, with a timer adjustable from 0 to 48 hours for long engineering-material drying runs.
Power-off parameter memory is a genuinely thoughtful feature: after an outage or a deliberate shutoff, the unit restores the previous material and temperature settings rather than returning to defaults. On a 48-hour cycle that saves you a real annoyance. It accepts 1.75mm and 2.85mm filament and supports PLA, PETG, TPU, ABS, nylon, PLA-CF, PA-CF and ASA.
Reviewers highlight the large touchscreen, the twelve presets and the longer timer as the practical wins over cheaper boxes, along with PTC-based heating that avoids the cold spots of pad-heater designs. The fan-driven circulation is why this unit dries evenly rather than from one corner.
Two limitations come up repeatedly. The chamber is single-spool, so this does not solve a multi-material problem. And the touchscreen is not much use if the unit is positioned out of reach during a print, which is exactly when you might want to change a setting mid-job. At this price some buyers also compare it unfavourably with the lower-priced Space Pi SE that appears earlier in this list.
That comparison is fair on paper. What justifies the extra spend is the interface and the preset library, and if you are the kind of person who will use twelve presets, they are worth it. If you are not, the SE is the better buy.
Where the touchscreen earns its price
Long cycles need setting up properly, and a 48-hour run on a composite at a precise temperature is fiddly with two buttons. The preset library turns that into a single press, which is the case this unit is actually designed for.
Power-off memory is the sleeper feature. If your dryer is on a cycle that gets interrupted, the unit resumes where it was rather than dumping you back at a default temperature.
When to buy the cheaper Creality instead
If you print PLA and occasionally PETG, you will use two presets out of twelve. The SE reaches 65 C, includes a hygrometer, runs quieter and costs less, which is a better fit for that reader.
Position matters too. A touchscreen you cannot reach during a long print is decoration, so place this where you can get to it or accept that you will not be changing settings mid-job.
PLA Drying Temperature and Time Chart
Eight hours at 50 C is the safe default for most PLA, and almost every box in this roundup can hit that. The table below gives the PLA figures first, then the higher settings you will need if you move to tougher materials later.
PLA drying reference
Freshly opened spool, stored indoors: 4-6 hours at 45 C. A short cycle is usually enough to condition a roll that has only been exposed briefly.
Spool stored open for a few months: 6-10 hours at 50 C. This is the range most people should default to.
Spool already popping and bubbling: 12 hours or more at 50 C, and check that your dryer can actually vent, since moisture has to leave the chamber to be removed from the filament.
Do not exceed 55 C. Above that PLA softens, and a spool that deforms on the spindle is a spool you cannot print from.
Upgrade settings for tougher materials
PETG: 55-65 C for 6-8 hours. Needs a real temperature ceiling above 55 C, which rules out some of the cheapest boxes.
TPU: 55-65 C for 6-8 hours. Flexible filament is denser and holds more moisture than PLA, so cycles run longer.
ABS and ASA: 65-75 C for 4-6 hours. Warping resistance improves noticeably with proper drying, and ASA adds UV stability to the same recipe.
Nylon and PA-CF: 70-80 C for 12-24 hours. These are among the most hygroscopic filaments you can buy and they are unforgiving of half-drying.
Polycarbonate: 70-85 C for 6-12 hours. This is where the dual-chamber units earn their price.
Two notes on interpreting these figures. Cycle times assume a properly vented chamber; a sealed box with no moisture escape needs noticeably longer, which is the single most common complaint levelled at the entry-level units. And drying fixes moisture problems only, so if a print still fails after a full cycle, check bed adhesion, nozzle condition and slicer settings before blaming the filament again.
If you are still building out your setup, our [guide to filament dryers for 3D printing](https://www.esa-spaceweather.net/best-filament-dryers-for-3d-printing/) covers the wider all-filament category, and our [3D scanner picks](https://www.esa-spaceweather.net/best-3d-scanners-for-3d-printing/) cover the other half of a reliable print workflow.
How to Choose a Filament Dryer for PLA
Temperature ceiling first. PLA needs 40-50 C and nothing more. Any box with a 45 C minimum and a 55 C ceiling does the job perfectly, and paying for 85 C or 110 C units solves problems a PLA printer does not have. Buy headroom only when you know you are moving to PETG, TPU or nylon.
Spool capacity matches your real workload. One spool suits one printer printing sequentially. Two spools let you rotate stock without pausing. Four spools plus eight exit holes serve a print farm or a Bambu AMS setup. Also check spool width, because most two-spool boxes cap out around 70 mm per spool and only the Sovol SH01 and the SUNLU S4 accept wide coils or can be modified for 3 kg spools.
Venting and sealing decide whether it works. Moisture has to leave the chamber to leave the filament. A unit with poor air exchange will stretch every cycle well past the advertised time, and the Creality Space Pi SE in particular needs its lid propped open during a heat cycle. A tight gasket matters just as much in humid climates, where loose seals let damp room air back into a dried chamber.
Humidity sensing tells you when to stop. A built-in hygrometer lets you watch relative humidity fall rather than following a fixed timer. Check what it does while idle, though, because some units stop updating when not actively drying, and some floor at a fixed reading.
Print-while-drying matters for long jobs. A sealed PTFE feed-through lets a printer draw filament straight from a heated chamber, which stops moisture re-absorption during a multi-day print. Single-spool boxes with a spool holder handle this well; multi-spool units with multiple exit ports handle it for several machines.
Noise is the most-discussed factor in the forums. Fan noise is the number one complaint category in community threads on this topic. Low-wattage single-spool units are the quietest because they have the smallest fans, while 150W and 350W multi-spool units run noticeably louder. Owners also report that you mostly stop noticing once the printer itself is running nearby.
Running cost per cycle is small but not zero. An 80W unit over a six-hour cycle uses under half a kilowatt-hour, while a 350W unit over the same cycle uses a little over two. Neither is a significant household cost, but a 99-hour timer on a multi-spool unit is worth setting thoughtfully rather than leaving to run indefinitely.
Check whether your printer already dries. If you own a current-generation Bambu Lab AMS unit with integrated drying, a standalone dryer may be redundant for the AMS-fed materials. Buying both is a common and entirely avoidable duplicate. Our [resin wash station roundup](https://www.esa-spaceweather.net/best-resin-3d-printer-wash-stations-for-hobbyists/) covers the other side of the post-processing workflow if resin is part of your setup.
Community consensus, in brief. Across r/3Dprinting and the Prusa Forum threads that rank for this query, the recurring picks are the SUNLU S4 for a Bambu AMS setup, the SUNLU S1 Plus as a serviceable budget option, and the Creality Space Pi family for temperature accuracy. EIBOS Polyphemus and Sovol SH02 are both named as solid mid-range choices, with the SH02 noted as fitting two spools or one large spool while being a bit loud. Two caveats recur: fan noise, and reports of heating inconsistency on one SUNLU model. The recurring theme underneath all of it is that climate decides whether you need a dryer at all.
What We Did Not Pick and Why
A roundup that only lists winners is less useful than one that explains the near-misses, so here are the categories we deliberately excluded and the reasoning behind each.
Dryers with 85 C and 110 C ceilings sold for PLA-only use. They are genuinely capable machines, and several appear earlier in this guide for readers who need multi-material headroom. For a reader whose material list is PLA, they cost more money, take more space and consume more power to solve a problem that does not exist.
Printers with integrated drying. Some current multi-material units include drying in the tool head. If your setup already has one and the filaments you use are PLA and PETG, a standalone dryer is largely redundant for those spools. Check what your printer does before buying a separate box.
Passively sealed dry boxes as a primary recommendation. A dry box with fresh desiccant is genuinely enough in a dry climate for a reader who finishes spools quickly, and we say so plainly elsewhere in this guide. We have not put one in the main list because it cannot rescue an already wet spool, which is the failure this article starts from.
DIY substitutes we would not put in a ranked list. A food dehydrator with a temperature control does dry filament, and it was the standard workaround before purpose-built boxes were affordable. The limits are real, though: no sealed filament exit port for print-while-drying, less precise temperature regulation, and a round tray that rarely fits a standard spool cleanly. If you already own a dehydrator, use it. If you are buying something new for PLA, a purpose-built unit is the better purchase.
Frequently Asked Questions
Do you really need a filament dryer for PLA?
Probably not, if you live in a dry climate and finish spools within a few weeks. A sealed dry box with fresh desiccant handles that case for far less money. You almost certainly do need one if your spools have been open for months, if your home humidity runs high, or if you already see popping, bubbling, stringing and a rough surface finish on prints that used to come out clean. PLA is the least hygroscopic common filament, so the need is genuinely situational.
How long should I put PLA in a filament dryer?
Four to six hours at 45 C for a freshly opened spool, six to ten hours at 50 C for a spool that has been stored open for a few months, and twelve hours or more at 50 C for one that is already popping and bubbling. Eight hours at 50 C is the safe default for most people. Extend these times if your dryer vents poorly, because moisture has to leave the chamber to be removed from the filament.
What temperature should I dry PLA at?
Forty to fifty degrees Celsius, with 45 C the safest setting and 50 C the useful ceiling for anything already damp. Going above 55 C risks softening or deforming the filament, which matters if your dryer has a rotating spindle holding the spool. A 50 C ceiling is not a limitation for a PLA-only user. You only need 65 C or more if you later add PETG, TPU, ABS or nylon.
Can I use a food dehydrator as a filament dryer?
Yes, and it was the standard workaround before purpose-built dryers became affordable. The limits are worth knowing: most dehydrators have no sealed filament exit port, so you cannot print while drying, temperature regulation is less precise than a dedicated PTC-controlled box, and the round trays rarely hold a standard spool cleanly. If you already own a dehydrator it is a reasonable option. If you are buying something new for PLA, a purpose-built unit does the job more predictably.
Which filament dryer is quietest?
Low-wattage single-spool units with small fans run quietest, and owners consistently describe the Creality Space Pi SE as very quiet with a compact footprint. Higher-power multi-spool units such as the 150W Comgrow SH02 and 350W SUNLU S4 run noticeably louder, with the Sovol SH02 also noted in community threads as a bit loud. Most users report that once the printer itself is running nearby, they stop noticing the dryer at all.
What is the best filament dryer on Reddit?
Recurring community picks include the SUNLU S4 for a Bambu AMS setup, the SUNLU S1 Plus as a serviceable budget option, and the Creality Space Pi family for temperature accuracy that buyers verify with an infrared thermometer. EIBOS Polyphemus and Sovol SH02 are both named as solid mid-range choices. The caveats that come up repeatedly are fan noise, sealing quality in humid rooms, and reports of heating inconsistency on one SUNLU model.
Final Verdict
The Comgrow Filament Dryer Box is our top pick among the best 3D printer filament dryers for PLA. Two 1 kg spools, a 40-50 C band sized exactly to the material, live humidity readings and a sealed feed-through for printing while drying is the most complete package any PLA-only reader will find, and it is backed by 4683 owner reviews at 4.4 stars.
The rest of the shortlist depends on your setup rather than on quality. Take the Creality Space Pi SE if quiet operation on a small desk matters most. Take the SUNLU S1 Plus if you want the cheapest workable box. Take the Sovol SH01 if keeping opened spools dry between prints is your real problem. Take the Comgrow SH02 if PETG or TPU is on the horizon, the Polymaker PolyDryer if you want a dry-store-print loop, and the SUNLU S4 or Creality Space Pi X4 only when you are running several printers or genuinely need multi-material headroom.
And if your climate is dry and your spools move quickly, spend the money on desiccant and a sealed box instead. That is a perfectly good answer, not a failure to buy the right thing.