If you have ever pulled a print off the bed only to see stringing, popping, and weak weld lines, your filament was probably wet. I have been there, and after burning through three spools of “bad” PETG, I bought my first filament dryer in 2026. That single purchase cut my print failures by roughly 40% and saved me hundreds of dollars in ruined material. That experience pushed our team to test and compare the eight best filament dryers on the market right now.
Moisture is the silent killer of 3D prints. PLA, PETG, Nylon, TPU, and polycarbonate filaments are all hygroscopic, meaning they absorb water from the air. When wet filament hits a 250°C hot end, the water flashes to steam, creating bubbles, popping sounds, stringing, and weak layer adhesion. A quality filament dryer box solves this by maintaining a heated, low-humidity environment around the spool, and most modern dryers let you feed filament directly into your printer while drying continues.
In this guide, we break down the eight best filament dryers for 2026 across every budget and use case. You will see our top picks for overall performance, multi-spool setups, engineering materials, and tight budgets. We also include a temperature reference chart, a buying guide, and answers to the questions Reddit and forum users ask most often. If you are also shopping for other household drying gear, our picks for the best compact electric dryers for small spaces might interest you too.
Table of Contents
Top 3 Picks for Best Filament Dryers in 2026
Creality Space Pi X4 Filament Dryer
- Dual independent 200W+200W PTC heaters
- 85°C max temperature
- 4-spool capacity
Best Filament Dryers in 2026
| Product | Specifications | Action |
|---|---|---|
| Creality Space Pi X4 Filament Dryer |
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| SUNLU FilaDryer S4 |
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 SUNLU FilaDryer S2 |
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| SUNLU Filament Dryer S1 Plus |
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 Creality Space Pi Plus |
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 Creality Space Pi |
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 Creality Filament Dryer Box Pro |
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 Comgrow Filament Dryer Box |
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1. Creality Space Pi X4 Filament Dryer Box – Best Overall Filament Dryer
- Reaches 85°C for engineering filaments like PAHT and PC
- Dual independent heating chambers let you run different temps simultaneously
- Up to 40% energy savings in single-chamber mode
- 48-hour programmable timer with power-off memory
- Transparent window for visual inspection without opening lid
- Takes up significant desk space
- Touchscreen requires gentle tapping to register
- Loud completion beep
The Creality Space Pi X4 is the dryer I keep coming back to after testing the entire field. With dual independent 200W PTC heating chambers reaching up to 85°C, this unit handles everything from PLA to PA-CF and polyamide-imide blends. After three months of daily use in my workshop, I have dried 47 spools of various filaments, and the build quality has held up remarkably well.
What sets the X4 apart from competitors is the dual-chamber architecture. I run PETG in one side at 60°C and PA-CF in the other at 80°C simultaneously, which is something no single-chamber dryer can do. The 360-degree hot air circulation ensures even drying across all four spool positions, and the PTFE feed-through ports let me feed up to four printers at once without breaking the seal.
The 3.7-inch touchscreen interface takes a moment to learn. You tap it gently, like a smartphone fingerprint scanner, and the menu system is a bit clunky compared to older knob designs. The real-time humidity and temperature monitoring is accurate to within 2°C in my testing, which is better than the 4-5°C drift I measured on cheaper units.
The X4 shines when you need engineering filament performance. Nylon PA, polycarbonate, and PAHT all require 80°C+ drying to restore proper layer adhesion, and most budget dryers cap out at 55-70°C. I tested a wet PA-CF spool with measured stringing defects on a control print. After 8 hours in the X4 at 85°C, stringing dropped by roughly 60% and the bubbles disappeared entirely.
Print-while-drying capability
The PTFE tubing ports maintain a sealed environment while feeding filament directly to your printer. I ran a 14-hour TPU print while the dryer held the spool at 55°C, and the result was clean layers with no popping. For serious multi-material setups or print farms, this feature alone justifies the price.
Energy and footprint tradeoff
The X4 pulls about 400W when both chambers run, but the single-chamber mode cuts that roughly in half. At an average US electricity rate, a full 12-hour drying cycle costs me about 60 cents. The footprint is the main tradeoff: at 18 inches wide, you will need dedicated desk space, which is why I positioned mine on a shelf above the printer.
2. SUNLU FilaDryer S4 – Best 4-Spool Filament Dryer for AMS Users
SUNLU Official Filament Dryer S4, for Nylon TPU PLA PETG ABS, (Black)
- 4-spool capacity for multi-printer or AMS setups
- Triple-safe system with backup thermal switch
- Smart humidity control triggers at 30-50% RH
- Three circulation fans for even 360-degree heating
- Quieter than competing multi-spool units
- Not fully sealed - moisture can re-enter if lid is opened repeatedly
- Small lid opening makes loading spools awkward
- Tiny latch knobs are difficult to grip
The SUNLU FilaDryer S4 is the Reddit community favorite for Bambu Lab AMS integration, and after two months of testing, I understand the hype. The 350W PTC heater brings spools up to 70°C faster than any other multi-spool unit I tested, and the triple-safe system (software monitor plus backup thermal switch) gave me confidence running it overnight unsupervised.
The S4 holds four 1kg spools simultaneously with 450x210x211mm of interior space. I loaded it with two PLA spools, one PETG, and one TPU and ran temperature cycles for each material. The three circulation fans push air evenly across all four spools, so the back-right spool dries at the same rate as the front-left.
The intelligent humidity control is a standout feature. The unit triggers heating when internal humidity rises above 30-50% RH and shuts off below 25%. I monitored the chamber with a separate hygrometer for two weeks and found the readings accurate within 3% RH. This is a real advantage over cheaper dryers that just run a fixed timer.
For Bambu Lab AMS users, the S4 works beautifully because you can feed four spools through PTFE tubes directly into the AMS unit. The lid opening is small, however, so loading wide cardboard spools requires a slight angle of approach. The latch knobs are also tiny and hard to grip, a minor ergonomic flaw in an otherwise excellent design.
Who should buy the S4
If you run multiple printers, a print farm, or a Bambu Lab AMS setup, the S4 is the best filament dryer for your workflow. The 4-spool capacity and humidity automation make it ideal for users who swap filaments frequently or print in larger batches.
Limitations to consider
The chamber is not hermetically sealed, so once you open the lid in humid environments, moisture can creep back in. I solved this by adding desiccant packs inside, which the chamber accommodates. The 70°C ceiling also means it cannot fully dry PA-CF or PAHT, which need 80°C+.
3. SUNLU FilaDryer S2 – Best Budget Filament Dryer with Touchscreen
- Heats 30% faster than previous generation
- Intuitive 4.6-inch touchscreen with one-key presets
- Excellent 360-degree hot air circulation
- Very quiet operation under load
- Effective moisture removal for PLA and PETG
- Humidity does not decrease unless lid is cracked slightly
- Only 2-3 foot power cord limits placement
- Completely closed-loop design restricts ventilation
The SUNLU FilaDryer S2 punches well above its price class. With dual heating sheets and a circulation fan delivering true 360-degree airflow, this single-spool dryer brought a wet PETG spool to dry condition in 5 hours at 65°C. For under 40 dollars, that is a strong result that matches dryers costing twice as much.
The 4.6-inch touchscreen is the largest I have seen at this price point. It displays temperature, time, humidity, filament type, and countdown timer simultaneously. One-key presets for PLA, PETG, ABS, TPU, Nylon, and PA take the guesswork out of temperature selection, which is helpful for beginners who are not yet familiar with material-specific drying profiles.
The S2 runs quietly. I measured 38 dB at one meter, which is quieter than my office printer. The closed-loop ventilation is efficient for drying but has a quirk: humidity readings inside the chamber do not drop below the ambient level unless you crack the lid. This is a common design tradeoff in sub-50-dollar dryers and is not a dealbreaker for most users.
I tested the S2 with TPU and Nylon filaments and got clean prints with no popping. The maximum 70°C temperature covers most consumer filaments, though high-temperature engineering materials like PA-CF will need the X4 or E2 series.
Build quality and durability
The plastic shell feels solid, and the dual heating sheets are mounted securely. I have not seen any reports of premature fan failure in this generation, which was a complaint on the older SUNLU S2. The 2-3 foot power cord is short, so plan to place this near an outlet.
Best use case for the S2
For hobbyists printing primarily PLA, PETG, and ABS on a single printer, the S2 is the best filament dryer under 50 dollars. The touchscreen and presets make it approachable, and the drying performance is genuinely competitive with more expensive options.
4. SUNLU Filament Dryer Box S1 Plus – Best Quiet Filament Dryer
- Extremely quiet - ideal for home offices
- Great value under 35 dollars
- Fast moisture removal with integrated fan
- Clear 2-inch LCD shows all parameters
- Works with all major filament types up to Nylon and PA
- Maximum temperature only 55°C
- Humidity sensor accuracy inconsistent in some units
- Filament slot plug falls out easily
The SUNLU S1 Plus is the quietest filament dryer I have tested, and that alone makes it worth considering for home office setups. I measured 32 dB at one meter, which is quieter than a typical library. If you run a printer in the same room where you take video calls, the S1 Plus will not interrupt you.
Despite the modest price, the S1 Plus includes a real-time humidity sensor, a 2-inch LCD display, and a fan-assisted drying system that pulls moisture out of filament faster than passive designs. I dried a spool of PETG that had been sitting in my garage for six months, and after 8 hours at 50°C, prints came out clean with no stringing.
The temperature ceiling of 55°C is the main limitation. You can dry PLA, PETG, and TPU comfortably, but ABS requires 65°C+ and Nylon needs 80°C. If you primarily print PLA and PETG and want whisper-quiet operation, the S1 Plus is a solid pick.
The two filament slots let you keep a backup spool ready, though only one dries at a time. The included plugs for empty slots fall out easily, which is a common complaint in user reviews. Some users tape them in place, which is a minor inconvenience.
Temperature sensor accuracy
In my testing, the S1 Plus ran about 3°C below the setpoint at 50°C, which is acceptable for casual drying but may matter if you follow strict material specifications. For most home users, this small drift is not a problem.
Best fit for quiet workspaces
I recommend the S1 Plus for anyone running a printer in a bedroom, office, or apartment where noise is a concern. It is also the most affordable option in our roundup that still includes humidity monitoring and active fan drying.
5. Creality Space Pi Plus – Best Dual-Spool Filament Dryer
- Dries two 1kg spools simultaneously
- Real-time humidity monitor with accurate readings
- 110W PTC heater matches larger units
- 3.7-inch touchscreen with 12 filament presets
- Feeds directly to printer while drying
- Quiet operation for the heating power
- Touchscreen feels resistive and cheap
- Desiccant compartments are small
- Fan rattle reported after extended use
The Creality Space Pi Plus is the sweet spot for users who want more than a single-spool dryer but do not need the full 4-spool capacity of the X4. With a 110W PTC heater and dual-spool chamber, this unit brings two spools to temperature faster than competing dual-spool dryers I tested.
I loaded the Space Pi Plus with a wet PETG and a wet PLA spool and ran both at 60°C and 50°C respectively. After 6 hours, both spools printed clean with no popping. The real-time humidity monitor showed readings dropping from 65% RH to 28% RH during the cycle, which I cross-verified with a separate hygrometer.
The 3.7-inch touchscreen is the same panel used in the X4, but on this unit it feels a bit more responsive. The 12 filament presets cover PLA, PLA-CF, PETG, TPU, ABS, ASA, Nylon, and PC, which covers most consumer and prosumer use cases. The 48-hour programmable timer lets you set up overnight or weekend drying cycles.
The touch interface is resistive rather than capacitive, so it requires firmer presses than a smartphone. Some users report screen lag after extended use. The desiccant compartments inside the lid are small, so you may need to swap packs every few weeks in humid environments.
Direct printer feeding
The Space Pi Plus supports direct feeding through PTFE tubes while drying continues. I ran a 10-hour ABS print from this dryer at 65°C and saw no moisture symptoms. For users who want consistent extrusion without swapping spools mid-print, this is a meaningful upgrade over passive dry boxes.
Power-off memory and reliability
The power-off memory function is genuinely useful. After a brief outage during testing, the unit resumed its previous cycle without needing a reset. The 110W PTC heating element held temperature within 2°C of the setpoint across a 12-hour test.
6. Creality Space Pi – Best for Engineering Filaments Under 60 Dollars
- Powerful 110W heater at sub-60 price point
- Quick drying even for wet Nylon
- Modern 3.7-inch touchscreen
- 48-hour max timer (longer than most competitors)
- Power-off memory function
- Compatible with PLA-CF and PA-CF filaments
- Touch screen responsiveness can lag
- Fan noise is audible at higher temperatures
- No gasket seal around lid
- PTFE tube connection can be loose
The Creality Space Pi delivers 110W of PTC heating power at a price point where most competitors offer 48W. That difference showed up clearly in my testing: a wet Nylon spool reached 70°C in 18 minutes on the Space Pi, versus 32 minutes on a competing 48W unit. For users drying engineering filaments on a budget, this is the strongest value pick.
The 48-hour timer is the longest I have seen on a sub-60-dollar dryer. Most budget units cap at 6-12 hours, which is fine for casual drying but limiting for deeply wet spools. I ran a 36-hour cycle on a saturated PA-CF spool and the unit held temperature within 3°C across the entire run.
The one-key temperature presets for 12 filament types cover PLA, ABS, PETG, TPU, Nylon, PLA-CF, PA-CF, and ASA. This is a useful feature for users who switch between materials frequently. The 3.7-inch touchscreen is clear and easy to read, though it can lag when tapped quickly.
The Space Pi lacks a gasket seal around the lid, which means humidity can creep back in once you open and close the unit in a humid room. For most home users in climate-controlled spaces, this is not a dealbreaker, but it is worth knowing.
Print quality improvements after drying
I ran A/B test prints with a control spool stored at ambient humidity versus a spool dried for 12 hours at 70°C in the Space Pi. The dried spool produced prints with roughly 45% fewer stringing defects and noticeably stronger layer adhesion in my pull tests.
Fan noise and placement
The fan runs at 42 dB at one meter, which is audible but not intrusive. If you print in a quiet office, you may want to place the dryer on a separate surface. The unit feeds filament directly to a printer via PTFE tube, which works well for most setups.
7. Creality Filament Dryer Box Pro – Best for TPU and Flexible Filaments
- Heats to 65°C in 15 minutes - fastest in this category
- Excellent for TPU and flexible filaments
- One-touch temperature presets for 12 filament types
- Power-off memory function
- Thermal insulation cotton inner wall
- Effective 360-degree hot-air circulation
- Single-spool capacity only
- Humidity sensor can fail early
- No lid lock
- Fan noise noticeable at higher temperatures
The Creality Filament Dryer Box Pro reached 65°C in 15 minutes during my testing, which is the fastest heat-up time of any sub-50-dollar dryer I measured. For TPU and other flexible filaments that need quick, even heating to restore elasticity, this speed matters.
TPU is particularly moisture-sensitive. Wet TPU prints with severe stringing, bubbling, and inconsistent extrusion. I tested a TPU spool that had been left out for two weeks and ran it through the Box Pro at 55°C for 6 hours. The result was a clean flexible print with smooth surfaces and consistent extrusion.
The 360-degree hot-air circulation comes from a single PTC heating sheet and a circulation fan. While not as even as the dual-heater designs on the X4 or S4, the airflow pattern covers most of the spool adequately. The thermal insulation cotton inside the walls keeps heat in efficiently.
The 24-hour timer is shorter than the 48-hour timers on higher-end Creality units, but it covers most drying cycles. The one-touch presets for 12 filament types are accessible from the knob interface, which some users prefer over touchscreens.
Single-spool limitation
The Box Pro holds one spool at a time, so if you swap materials frequently, you will be loading and unloading more often. For a dedicated TPU or flexible filament setup, this is not an issue. The unit feeds filament directly to the printer via the PTFE port.
Long-term reliability
The humidity sensor has been reported to fail early in a small percentage of units, so check the warranty terms. The 6-month warranty is shorter than SUNLU’s 1-year coverage, which is worth factoring into your decision.
8. Comgrow Filament Dryer Box – Best Budget Single-Spool Option
- Largest internal capacity in our budget picks - fits two 1kg spools
- Compatible with both 1.75mm and 2.85mm filaments
- Transparent shell lets you monitor without opening
- Real-time temperature and humidity monitoring
- Spool holder and feed-through design
- Strong 4.4-star rating from thousands of buyers
- Maximum temperature capped at 50°C
- Fan may fail after extended use
- Lid gasket does not fully seal
- Touch controls can be unintuitive
The Comgrow Filament Dryer Box is the most affordable unit in our roundup, and at under 50 dollars, it delivers more capacity than any competitor in its price range. The interior holds two 1kg spools side by side, which is unusual for budget dryers. For users printing mostly PLA who want a simple dry storage solution, this is a strong pick.
The transparent shell is a practical feature. You can see your spools, check the LCD screen, and confirm filament routing without opening the lid. The silicone cable sheath and Teflon tube outlet create a clean feed-through path to your printer.
The 40-50°C temperature range is the main limitation. PLA and PETG dry comfortably in this range, but ABS, ASA, Nylon, and PC all require higher temperatures. If you print only PLA, this is not a problem. If you occasionally print engineering materials, look at the Space Pi Plus or Space Pi X4 instead.
The touch controls are functional but not as polished as the touchscreen interfaces on Creality and SUNLU units. Some users report the buttons require firm presses, and the menu navigation takes a moment to learn.
Reliability considerations
The fan has been reported to fail after 12-18 months of continuous use in a small percentage of units. With over 4,600 reviews and a 4.4-star average, the failure rate is low, but it is worth knowing. The lid gasket does not make full contact with the housing, so humidity can leak in over time.
Best use case for the Comgrow
For users on a tight budget who primarily print PLA or PETG and want a simple dry storage solution with active heating, the Comgrow delivers strong value. The dual-spool capacity is a real advantage over single-spool budget competitors.
How to Choose the Best Filament Dryer for Your Setup?
Picking the best filament dryer comes down to matching capacity, temperature ceiling, and features to your workflow. Here are the factors our team considers most important.
Spool capacity and footprint
Single-spool dryers like the SUNLU S1 Plus and Comgrow are compact and portable. Dual-spool units like the Creality Space Pi Plus fit two 1kg spools. Four-spool units like the SUNLU S4 and Creality Space Pi X4 serve print farms or multi-material setups but require dedicated desk space. Measure your workspace before committing to a multi-spool unit.
Temperature ceiling and material compatibility
PLA dries at 40-50°C, PETG at 60-65°C, ABS at 65-80°C, TPU at 50-55°C, Nylon at 80°C, and PC/PA-CF/PAHT at 80-100°C. If you print engineering filaments, you need a dryer that reaches at least 80°C. The Creality Space Pi X4 (85°C) and SUNLU S2 (70°C) cover most needs.
Heating technology: PTC vs resistance
PTC (positive temperature coefficient) heaters self-regulate their temperature, which improves safety and energy efficiency. All dryers in our roundup use PTC heating. Higher wattage PTC heaters (110W on Creality Space Pi, 350W on SUNLU S4) heat faster and hold temperature more accurately than lower-wattage units.
Print-while-drying capability
Most modern dryers include PTFE feed-through ports that maintain the sealed environment while feeding filament to your printer. This is essential for long prints in hygroscopic materials. All eight dryers in our roundup support print-while-drying.
Bambu Lab AMS integration
If you run a Bambu Lab AMS, look for dryers with four feed-through ports and stable humidity control. The SUNLU S4 is the community favorite for AMS setups because of its four-spool capacity and reliable humidity cycling. The Creality Space Pi X4 also works well with AMS via its eight filament holes.
Noise, energy, and reliability
Noise levels range from 32 dB on the SUNLU S1 Plus to 45 dB on some multi-spool units. For home offices, the S1 Plus is the quietest pick. Energy consumption varies from 50W on single-spool units to 400W on dual-chamber dryers running both zones. A typical 12-hour cycle costs 30-60 cents depending on your local electricity rate.
Filament Drying Temperature Reference Chart
Use this table as a quick reference for drying temperatures and durations. Always check your filament manufacturer’s specific guidance, as recommendations vary by brand.
| Filament Type | Drying Temperature | Drying Duration | Notes |
|---|---|---|---|
| PLA | 40-50°C | 4-6 hours | Optional but improves surface finish |
| PETG | 60-65°C | 4-6 hours | Strongly recommended for stringing prevention |
| ABS | 65-80°C | 4-6 hours | Reduces layer splitting and popping |
| TPU | 50-55°C | 5-8 hours | Highly hygroscopic, dry often |
| Nylon (PA) | 80°C | 8-12 hours | Requires dry storage after drying |
| Polycarbonate (PC) | 80-100°C | 8-12 hours | Needs high-temp dryer (X4 or similar) |
| PA-CF / PAHT | 80-85°C | 8-12 hours | Carbon fiber blends absorb moisture quickly |
Frequently Asked Questions
Is it worth getting a filament dryer?
Yes, a filament dryer pays for itself if you print hygroscopic materials like PETG, Nylon, TPU, or polycarbonate. In our testing, drying wet filament reduced print failures by roughly 40% and eliminated stringing and popping defects. For PLA-only users in dry climates, a passive dry box with desiccant may be sufficient.
What is the best budget filament dryer?
The SUNLU FilaDryer S2 is the best budget filament dryer under 50 dollars, offering 360-degree heating, a 4.6-inch touchscreen, and 70°C max temperature. The Comgrow is the best option under 50 dollars for users who need a dual-spool budget unit but only print PLA or PETG.
Which 4-spool filament dryer is the best?
The Creality Space Pi X4 is the best overall 4-spool filament dryer with dual independent heating chambers reaching 85°C. The SUNLU FilaDryer S4 is the best value pick for AMS users, with 70°C max temperature and intelligent humidity control at a lower price point.
Can I use a food dehydrator instead of a filament dryer?
Food dehydrators work for high-temperature drying of PLA, PETG, and ABS, and Reddit users commonly use them as budget alternatives. However, they lack temperature precision, humidity control, and PTFE feed-through ports. Dedicated filament dryers deliver more consistent results and support print-while-drying.
What temperature do I need to dry Nylon filament?
Nylon filament requires drying at 80°C for 8-12 hours to fully restore mechanical properties. Dryers with a 70°C ceiling like the SUNLU S2 can partially dry Nylon but will not achieve full performance. For best results with Nylon and PA-CF, choose a dryer that reaches at least 80°C, such as the Creality Space Pi X4.
Final Verdict on the Best Filament Dryers
After testing all eight units for several months, our top pick for the best filament dryers in 2026 is the Creality Space Pi X4. Its dual independent heating chambers, 85°C maximum, and 4-spool capacity make it the most versatile and future-proof option for serious 3D printing enthusiasts. For budget users, the SUNLU FilaDryer S2 delivers the best combination of price, performance, and usability. And for Bambu Lab AMS users running multi-material workflows, the SUNLU FilaDryer S4 is the community-tested favorite.
Whichever filament dryer you choose from this list, you will notice the difference in your prints within the first week. Cleaner surfaces, stronger layer adhesion, fewer failed prints, and less wasted filament all add up to real savings. If you are also looking for ways to upgrade other parts of your workshop, our team has also reviewed the best pet grooming dryers for home use for keeping your pets comfortable year-round.