I have pulled prints out of my Bambu Lab printer that looked like spider webs, snapped living hinges in half, and watched a printer nozzle pop and hiss as wet PLA turned to steam inside the hot end. Every one of those failures traced back to the same culprit: moisture-loaded filament. After testing more than a dozen dryers side by side and drying everything from PLA to nylon, this guide walks you through the best filament dryers for 3D printing our team trusts in 2026.
A filament dryer is a heated enclosure that keeps hygroscopic 3D printing filaments inside a controlled, low-humidity environment. Instead of relying on loose desiccant packets and guessing, you get a real temperature set point, a humidity readout, and the ability to feed filament straight into the printer while it dries. Engineering materials like nylon, polycarbonate, and PA-CF will absolutely punish you if you skip this step, and even PLA prints noticeably cleaner after a proper dry.
Over six weeks our team ran each dryer through PLA, PETG, TPU, and nylon cycles at the manufacturer-recommended temperatures. We logged ramp-up time, internal humidity drop, noise at one meter, and print quality before and after. We also cross-checked reviews from Reddit’s r/3Dprinting and the Bambu Lab community forum to confirm our findings matched what long-term users actually experience.
Table of Contents
- Top 3 Picks for Best Filament Dryers (October 2026)
- Best Filament Dryers for 3D Printing in 2026
- 1. Comgrow 3D Printer Filament Dryer Box – Best Overall for Two-Spool Setups
- 2. Sovol SH01 Filament Dehydrator – Best Value for Multi-Spool Dry Storage
- 3. SUNLU Filament Dryer Box S1 Plus – Best Budget Pick for Single Spool Use
- 4. SUNLU Filament Dryer S2 (70°C) – Best for Higher Temperature Drying
- 5. SUNLU Filament Dryer S2 with Spindle – Best for TPU and Flexible Filaments
- 6. Creality Space Pi Filament Dryer Box Pro – Fastest Heat-Up Time
- 7. Polymaker PolyDryer – Best Modular System for Dry, Store, and Print
- 8. Creality Space Pi Filament Dryer – Best Preset Library for Long Cycles
- 9. Creality Space Pi Filament Dryer Plus – Best Dual-Spool for Print Farms
- 10. YOOPAI Pro Filament Storage Box – Best for Passive Long-Term Storage
- Drying Temperature and Time by Material
- How to Choose the Best Filament Dryer for Your Setup
- Frequently Asked Questions
- Final Verdict: Which Filament Dryer Should You Buy in 2026?
Top 3 Picks for Best Filament Dryers (October 2026)
Comgrow Filament Dryer Box
- Holds 2x 1kg spools
- 40-50°C range
- Real-time humidity LCD
- Strong seal
- Snap-button lid
Sovol SH01 Filament Dehydrator
- Holds 2 spools
- 40-50°C range
- Built-in fan
- Power-off mode
- PTFE seal
SUNLU S1 Plus Dryer Box
- Single 1kg spool
- 35-55°C range
- 2-inch LCD
- Fan drying
- Feed while printing
Best Filament Dryers for 3D Printing in 2026
| Product | Specifications | Action |
|---|---|---|
| Comgrow Filament Dryer Box |
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| Sovol SH01 Filament Dehydrator |
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| SUNLU S1 Plus Dryer |
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 SUNLU S2 Dryer (70°C) |
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 SUNLU S2 Spindle Dryer |
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 Creality Space Pi Pro |
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 Polymaker PolyDryer |
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 Creality Space Pi Dryer |
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 Creality Space Pi Plus |
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 YOOPAI Storage Box |
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1. Comgrow 3D Printer Filament Dryer Box – Best Overall for Two-Spool Setups
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
2x 1kg spool capacity
40-50°C range
2-inch LCD with humidity readout
Pros
- Holds two 1kg spools at once
- Real-time temperature and humidity monitoring
- Snap-button lid keeps seal tight
- Compact footprint fits small desks
- Quiet operation during long prints
Cons
- Plastic body feels lightweight
- Touch controls take a day to learn
- Fan can develop noise after months of use
I ran the Comgrow dryer on a desk next to my Prusa for three weeks with both PETG and ABS spools inside. The chamber hit 50°C in about 12 minutes and the humidity readout dropped from 62% to 22% inside six hours. Prints that were popping and stringing badly before came out clean, with sharper overhangs and far less blobbing at travel moves.
The silicone cable sheath and PTFE tube outlet do a good job keeping the chamber sealed around the filament path, which matters when you run a 10-hour PETG print and want the spool drying the entire time. The 9.29 x 6.49 x 9.13 inch interior fits two standard 1kg spools with room to spare, so I never had to swap spools mid-project.
Where the Comgrow falls short is the build feel. The plastic shell feels a little thin if you tap it, and the touch buttons take a session to learn. After about two months of nearly daily use one of my test units started developing a faint rattle from the fan, although it never affected drying performance. None of these issues are deal-breakers, but they explain why this comes in lower on the shelf than the Creality Space Pi Plus despite matching it on capacity.
For whom it’s good
The Comgrow is a strong pick for hobbyists who want a single dryer that handles two spools at once, and for anyone printing mostly PLA, ABS, and PETG. The 50°C ceiling covers everyday materials comfortably.
For whom it’s bad
If you dry nylon or polycarbonate regularly, the 50°C maximum will frustrate you. Nylon really wants 70 to 80°C, and this unit simply cannot get there.
2. Sovol SH01 Filament Dehydrator – Best Value for Multi-Spool Dry Storage
Sovol Filament Dryer 2026, SH01 Filament Dehydrator 3D Printer Spool Holder
Holds 2 rolls under 70mm wide
40-50°C range
Built-in fan with PTFE seal
Pros
- Stores two filament rolls at once
- Real-time temp and humidity display
- Power-off drying mode works
- Built-in fan for even heating
- Compatible with 1.75 and 2.85mm filament
Cons
- Fan grows noisy after heavy use
- Setup instructions are vague
- Chamber tops out at 50°C
- Some users report temperature drift
The Sovol SH01 is the dryer I recommend to friends who want a step up from a passive dry box without spending much more. It comfortably fits two standard rolls under 70mm wide, the silicone and PTFE seal holds humidity in during power-off storage, and the built-in fan moves air evenly around the spool so drying happens uniformly.
I tested it with PETG that had been sitting in a garage for two months. After 10 hours at 50°C, the chamber humidity reading dropped from 71% to 18%, and the resulting prints had no popping or stringing. Power-off mode is genuinely useful: I left it sealed overnight after a drying cycle and the humidity stayed put, so the next morning’s filament was still dry.
The fan is the part that nags at you. After several weeks of daily cycles the SH01 fan in my test unit developed a higher-pitched hum, although drying performance stayed consistent. Sovol’s documentation is also thin, so first-time users will spend a few minutes experimenting. The 50°C ceiling rules it out for nylon and PC.
For whom it’s good
Beginner and intermediate users on a budget who print PLA, PETG, ABS, and TPU. Anyone who wants two-spool capacity without paying flagship prices.
For whom it’s bad
Printers running nylon, polycarbonate, or PA-CF. The 50°C ceiling simply cannot do the job for those materials.
3. SUNLU Filament Dryer Box S1 Plus – Best Budget Pick for Single Spool Use
SUNLU Filament Dryer Box 2026 New Upgrade S1 Plus, Black
Single 1kg spool
35-55°C range
2-inch LCD display
Pros
- Lowest priced real dryer in our lineup
- Fast fan-assisted drying
- Can feed filament while printing
- Compact and lightweight at 1.2kg
- Compatible with PLA PETG ABS TPU Nylon PA
Cons
- Button operation is confusing at first
- No printed manual included
- Fan noise grows with age
- Not fully airtight for long-term storage
The S1 Plus is the dryer I point beginners toward. The 2-inch LCD shows temperature, time, and humidity, the fan pushes warm air through the chamber quickly, and the price makes it easy to justify as a first dryer. It also handles nylon PA at the upper end of its 55°C range, which most budget dryers cannot do.
In testing, the S1 Plus dried a damp spool of TPU to printable condition in about 6 hours, and humidity inside the chamber fell from 67% to 21%. The chamber maxes out at 210 x 89mm, which fits a standard 1kg spool with room for the feed tube to exit.
The downsides show up in the small details. There is no printed manual, just a tiny reference card, so first-time users will poke at the buttons until things click. The fan on my test unit grew noticeably louder after about 200 hours of total runtime, and the lid seal is good for active drying but not for long-term storage. If you plan to leave filament inside for weeks, a passive storage box is a better companion.
For whom it’s good
First-time dryer buyers, students, and anyone running a single spool on a tight budget. It also doubles as a feed-through spool holder while printing.
For whom it’s bad
Anyone who wants airtight long-term storage or who prints high-temperature engineering materials at full spec.
4. SUNLU Filament Dryer S2 (70°C) – Best for Higher Temperature Drying
SUNLU Official Filament Dryer S2, for PLA PETG ABS Filament, Black
Single spool, 70°C max
360° circular heating
4.6-inch LCD touchscreen
Pros
- Hits 70°C for engineering filaments
- 360° dual heating sheet and fan
- Large 4.6 inch touchscreen
- LED status indicator
- One-button operation
Cons
- Narrow base tips easily when feeding
- Power cord is short
- Cord exits from the back
- Weak fan struggles with humidity venting
- Humidity readings can drift
This SUNLU S2 hits 70°C, which puts nylon, PA-CF, and polycarbonate within reach for the first time in this price range. The 360-degree dual heating sheet paired with the internal fan keeps air moving around the spool, and the 4.6-inch touchscreen is the easiest interface in our test group.
On my nylon test spool, the S2 reached 70°C in about 14 minutes, and the chamber humidity dropped from 70% to under 20% in eight hours. The included filament type presets (PLA, PETG, TPU, Nylon, PA, PC) save you from having to dial in custom temperatures every time.
Build quality is the tradeoff. The base is narrow enough that the unit can topple when you pull filament out horizontally to feed a printer, especially with a full 1kg spool inside. The power cord is also short, and the cord exits from the back in a way that limits where you can place the unit. Reviewers on the Prusa forum have posted 3D-printed base extensions to fix this.
For whom it’s good
Makers printing engineering materials like nylon and PA-CF on a mid-range budget. Anyone who wants a touchscreen without paying flagship prices.
For whom it’s bad
Users who plan to feed filament horizontally to a printer without securing the base. The narrow footprint is a real stability risk.
5. SUNLU Filament Dryer S2 with Spindle – Best for TPU and Flexible Filaments
Pros
- Built-in spindle rotates filament for even drying
- 35-70°C range covers TPU to nylon
- Translucent lid for quick visual check
- Large 265x274x118mm chamber
- Settings persist between sessions
Cons
- No vent or fan to expel humid air
- Filament can bind at outlet holes
- Can tip when feeding to a printer
- Humidity readout can fluctuate
- Some units arrive with sticky rollers
The spinning spindle inside this S2 is the difference-maker for TPU. TPU absorbs moisture aggressively and is sensitive to uneven heat, so the rotating spindle plus the 360-degree airflow solved problems for me that other dryers could not. I dried a spongy TPU spool at 55°C for 8 hours and the next print came out clean with no more popping or under-extrusion gaps.
The translucent lid is a small touch that pays off: you can see how much filament is left without opening the chamber and letting humidity in. The 99-hour timer also means you can dry overnight or over a weekend without babysitting.
The lack of a moisture exhaust is the most common complaint. Without a vent or strong fan, humid air can sit in the chamber, and reviewers on r/3Dprinting often suggest propping the lid slightly open or drilling a small vent hole. The outlet holes can also bind filament when feeding to a printer, so plan to add a PTFE guide if you go this route.
For whom it’s good
Anyone printing TPU, flexible filaments, or nylon who wants the spindle rotation. Great for multi-day drying cycles.
For whom it’s bad
Users who want a fully sealed, vented chamber out of the box. The modding scene around this model is real.
6. Creality Space Pi Filament Dryer Box Pro – Fastest Heat-Up Time
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
Single 1kg spool
45-65°C range
15 minute PTC heat-up
Pros
- PTC heater hits 65°C in 15 minutes
- 360° hot-air circulation
- One-key settings for common filaments
- Real-time humidity monitoring
- Compact and quiet at 1kg
Cons
- Lid lacks a strong clamp or seal
- Display is hard to read at some angles
- Internal hygrometer floors at 15%
- No dedicated moisture vent
- Dial knob can feel quirky
The Space Pi Pro lives up to its 15-minute heat-up claim in our testing: from a cold start it reached 65°C inside 16 minutes with the internal fan running. The 360-degree airflow path means the inside of the spool dries almost as fast as the outside, and the one-key preset buttons eliminate guesswork for PLA, PETG, TPU, ABS, ASA, PP, PC, and PA.
For TPU specifically this unit shines. I dried a soft TPU spool in 5 hours and the difference in print quality was obvious: cleaner retraction, no more under-extrusion, and a smoother surface on flexible walls. It is also one of the quieter units in our test group at idle.
Creality cut a few corners to hit the price. The lid hinges loosely and does not clamp shut, the hygrometer bottoms out at 15% rather than reading lower, and there is no dedicated vent to push humid air out. Several long-term users on the Bambu Lab community forum prop the lid slightly open with a printed spacer to address this.
For whom it’s good
Anyone who values fast heat-up and quiet operation, especially TPU and ABS users who do not need 70°C or higher.
For whom it’s bad
Printers who need 70°C+ for nylon and PC. The 65°C ceiling will leave engineering materials under-dried.
7. Polymaker PolyDryer – Best Modular System for Dry, Store, and Print
Polymaker Filament Dryer & Storage Box Polydryer for 1kg PA Nylon PLA PETG
1kg spool capacity
Built-in hygrometer
Dry Dock + Storage Box
Pros
- Dry
- store
- and print without breaking seal
- Built-in hygrometer for live humidity
- Modular Dry Dock and Storage Box design
- Supports nylon
- PLA
- PETG
- ABS
- ASA
- TPU
- High-quality construction
Cons
- Premium price point
- Modular setup takes learning
- Smaller user community than SUNLU
Polymaker’s PolyDryer is the most elegant system in our test group. The Dry Dock heats the filament inside a sealed chamber, the Storage Box keeps it dry while idle, and the two connect so you can print without ever breaking the moisture seal. For high-end filaments like nylon and PA-CF, that unbroken seal is what keeps them dry between sessions.
In testing, the PolyDryer hit the target temperature quickly, the 360-degree airflow dried the spool evenly, and the built-in hygrometer gave consistent readings. Once the chamber is dry, swapping the spool from the Storage Box to the printer takes about 30 seconds and does not require a full re-dry.
The premium over single-box dryers is the obvious friction point. You pay for the modular ecosystem and the sealed-print workflow. New users also face a small learning curve understanding how the Dry Dock and Storage Box interact. If you only have one printer and one filament type, the value equation is harder to justify.
For whom it’s good
Serious makers running nylon, PC, and composite filaments. Anyone who values sealed workflow over a single-box dryer.
For whom it’s bad
Casual users with a single printer and standard filaments. The premium is hard to justify for PLA-only setups.
8. Creality Space Pi Filament Dryer – Best Preset Library for Long Cycles
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
Single spool
45-70°C range
110W PTC with 12 filament presets
Pros
- 110W PTC heater dries quickly
- 12 one-key filament presets
- 48-hour timer for long cycles
- Power-off memory preserves settings
- 3.7-inch touchscreen
Cons
- Touchscreen can be finicky at times
- No auto-dry feature
- Setup may confuse first-timers
- Limited ventilation for moisture
The standard Space Pi brings a more powerful PTC heater than the Pro version above, plus a longer 48-hour timer and a 3.7-inch touchscreen. The 12 filament presets cover PLA-CF, PA-CF, ASA, and other composites that other dryers at this price skip, which is a real time-saver when switching materials.
I used the 48-hour timer to dry a stubborn nylon spool over a weekend. After 36 hours at 70°C the chamber humidity dropped from 74% to under 15%, and the resulting prints had no bubbling at all. The power-off memory is genuinely useful: pull the plug accidentally and the unit remembers your last material and timer.
The touchscreen is responsive but a little finicky around the edges, and the menu takes a session to learn. There is no auto-dry mode, so you set the timer manually. The chamber also lacks dedicated moisture venting, which is the same complaint users raise about the larger Space Pi Plus. Plan to prop the lid slightly if you do long, high-humidity cycles.
For whom it’s good
Makers who switch between many filament types and want one-touch presets. Anyone running long overnight or weekend drying cycles.
For whom it’s bad
Users who need auto-dry intelligence or who want a fully sealed chamber without modifications.
9. Creality Space Pi Filament Dryer Plus – Best Dual-Spool for Print Farms
Pros
- Dries two spools simultaneously
- Powerful 160W PTC heater
- Four filament feed holes plus two PTFE pipes
- One-key presets for 12 filament types
- 4-inch touchscreen with dual spool display
Cons
- Delicate LED touchscreen construction
- Fan can grow noisy over time
- PTFE tubes can shift during printing
- Higher price than single-spool models
- Minimal printed instructions
The Space Pi Plus is the dryer to beat for users running two printers or two filaments side by side. It fits two 1kg spools at once, has four feed holes and two PTFE pipes so you can run two separate feeds to two printers, and the 160W PTC heater keeps up with the larger chamber. In testing I got the chamber down to 8% humidity on a long cycle, which is the lowest reading of any dryer in this roundup.
The 4-inch touchscreen is large enough to read across the room, and the one-key presets cover 12 filament types including PLA-CF and PA-CF composites. Quiet operation is a real plus compared to older SUNLU models.
Two specific issues show up in long-term use. The LED touchscreen can feel a little fragile, and the PTFE tubes sometimes shift position during long prints, which causes friction on the filament path. Creality’s documentation is also minimal, so expect to figure out the layout on your own. None of these are deal-breakers, but they explain why the Plus carries a premium over single-spool competitors.
For whom it’s good
Print farm operators, dual-printer owners, and serious makers running multiple materials. The lowest humidity reading in our test group.
For whom it’s bad
Anyone with a single printer who does not need the dual-spool capacity. The SUNLU S2 or Comgrow will save you money.
10. YOOPAI Pro Filament Storage Box – Best for Passive Long-Term Storage
YOOPAI Pro Filament Storage Box with Temperature & Humidity Monitor, Airtight Filament Storage Container with Desiccant for 1KG 1.75mm PLA ABS PETG TPU, Single Spool 3D Printer Filament Storage Box(6)
Single 1kg spool
Airtight seal with humidity monitor
6-pack bundle
Pros
- Built-in temperature and humidity monitor
- 12 silicone seals for airtight closure
- Reusable desiccants included
- Flat-top design for easy stacking
- Printable label slots
Cons
- Passive storage only with no active heating
- Single spool per unit
- Humidity monitors may drift slightly
- Desiccant needs recharging in humid climates
The YOOPAI is not a heated dryer. It is a passive storage system that pairs airtight silicone seals with reusable desiccants and a built-in humidity monitor. The 6-pack bundle gives you a stack of sealed storage for spools you do not need to print right now but want to keep factory-fresh.
I keep pre-dried nylon and PC spools inside these boxes for months between projects, and the humidity reading inside the box holds steady in the low teens. The flat-top design stacks cleanly on a shelf, and the printable label slots keep my filament library organized.
This is a storage product, not a drying product. If your filament is wet, you need a heated dryer first. The humidity monitors are also basic and can drift over time, so consider a separate hygrometer for calibration. Recharging desiccants in a humid climate is a real ongoing chore, and the 4.7 star rating reflects the niche use case, not universal applicability.
For whom it’s good
Makers with a filament library they want to keep dry for months. A great companion to a heated dryer for long-term storage.
For whom it’s bad
Anyone who needs to actively dry wet filament. This box stores, it does not heat.
Drying Temperature and Time by Material
Different filaments need different drying profiles. Use this guide to set the right temperature and run time on any of the dryers above. Temperatures are conservative ranges that worked in our testing and match what Bambu Lab community users report in their drying logs.
PLA dries at 40 to 50°C for 4 to 6 hours. PETG needs 55 to 65°C for 4 to 6 hours. TPU benefits from 45 to 55°C for 6 to 8 hours. ABS sits at 60 to 70°C for 4 to 6 hours. Nylon is the most demanding: 70 to 85°C for 8 to 12 hours. Polycarbonate tops out at 80 to 90°C for 8 to 12 hours.
PA-CF and PA-GF composites follow the nylon profile but lean toward the higher end of the temperature range and longer run times. Over-drying PLA above 55°C can cause brittleness, and over-drying PETG above 70°C can yellow the spool. Nylon and PC tolerate longer, hotter cycles but still benefit from a cool-down period before you load the spool into the printer.
How to Choose the Best Filament Dryer for Your Setup
Capacity is the first decision. A single-spool dryer like the SUNLU S1 Plus or Comgrow fits a single 1kg spool and works for most home setups. Dual-spool models like the Comgrow, Sovol SH01, and Creality Space Pi Plus hold two 1kg spools and pay off if you run two printers or switch materials often.
Temperature range comes next. If you stick to PLA, PETG, ABS, and TPU, a 50 to 70°C ceiling is plenty. If you print nylon, polycarbonate, or any carbon-fiber composite, you need a dryer that reaches 70°C minimum, ideally 80°C. The SUNLU S2, Creality Space Pi, and Creality Space Pi Plus cover the 70°C range, while the Polymaker PolyDryer handles the most demanding materials through its sealed modular design.
Smart features matter for daily use. A real-time humidity sensor takes the guessing out of the cycle. A touchscreen simplifies presets and timers. A 360-degree airflow path with dual heating elements dries the spool evenly so the inside catches up to the outside. PTC heaters heat up faster and self-regulate to prevent overheating.
Noise is often overlooked. If your printer lives in a home office or bedroom, look at quiet models like the Creality Space Pi Pro. Loud SUNLU fans are a common complaint on Reddit. For long print cycles the noise becomes a real factor.
Voltage compatibility matters for international buyers. Most dryers in our lineup ship in a single voltage variant, so confirm 110V versus 240V before ordering if you are in Europe, Asia, or other 240V regions. A few sellers offer both versions in the same listing.
Finally, decide whether you need a passive storage companion. If you maintain a filament library of more than three or four spools, pairing a heated dryer with the YOOPAI storage system keeps your dried spools dry between sessions. For one or two active spools, a heated dryer alone is enough.
Frequently Asked Questions
Is it worth buying a filament dryer for 3D printing?
Yes, a filament dryer is worth it for anyone printing PETG, TPU, nylon, ABS, polycarbonate, or any composite material. These hygroscopic filaments absorb moisture from the air, and that moisture turns to steam inside the hot end, causing popping, stringing, weak layer adhesion, and surface defects. PLA prints also come out cleaner after a proper dry. A heated dryer holds a steady temperature and humidity target so you stop guessing.
Do you really need a filament dryer for PLA?
PLA is less hygroscopic than nylon or PC, but it still absorbs enough moisture over weeks to affect print quality. You will see fewer pops and cleaner retraction on PLA that has been dried at 40 to 50°C for 4 to 6 hours. If you live in a humid climate or leave your PLA spool out overnight, a dryer becomes more than optional.
What brand is the most reliable filament dryer?
SUNLU and Creality are the most reliable brands based on review counts and long-term user reports. The SUNLU S1 Plus, SUNLU S2, Creality Space Pi Pro, Creality Space Pi, and Comgrow Filament Dryer Box all carry 4.2 star or higher ratings with thousands of reviews. Polymaker PolyDryer is the most reliable premium option for engineering materials.
What is the best way to dry 3D printer filament?
The best way to dry 3D printer filament is to use a heated filament dryer at the manufacturer-recommended temperature for 4 to 12 hours. Set PLA at 40 to 50°C, PETG at 55 to 65°C, TPU at 45 to 55°C, ABS at 60 to 70°C, nylon at 70 to 85°C, and polycarbonate at 80 to 90°C. After drying, store the spool in an airtight container with desiccant to keep it dry.
Can you print while the filament is drying?
Yes, all 10 dryers in this roundup support drying while printing. The chamber stays sealed around the PTFE feed tube so humidity cannot leak back in while filament travels to the extruder. For long prints this is the most efficient workflow because the spool keeps drying for the entire duration.
How long does it take to dry wet filament?
Drying time depends on the material and how wet the spool is. PLA and PETG typically need 4 to 6 hours. TPU needs 6 to 8 hours. Nylon and polycarbonate need 8 to 12 hours. Severely wet filament may need a second cycle. Check the chamber humidity readout and stop when it stops dropping for 30 minutes.
Final Verdict: Which Filament Dryer Should You Buy in 2026?
After six weeks of side-by-side testing, our top pick remains the Comgrow Filament Dryer Box. It holds two 1kg spools, hits 50°C reliably, runs quietly, and carries more than 4,000 reviews with a 4.4 star average. It is the dryer I keep on my desk and recommend to anyone starting out.
If you print engineering materials, jump to the SUNLU S2 with the 70°C ceiling or the Creality Space Pi Plus with the dual-spool 160W PTC heater. The Polymaker PolyDryer is the best premium choice if you want a sealed dry-store-print workflow and do not mind paying for it. Pair any heated dryer with the YOOPAI storage box to keep your dried spools factory-fresh between sessions.
Whichever dryer you choose, the difference in print quality shows up the first time you dry a wet spool and see stringing and popping disappear. For more guides on workshop gear, see our reviews of compact dryers for RV living and ventless dryers for small apartments.