SUNLU Filament Dryer S2
4.3Editor score
265x274x118mm capacity
Translucent lid for viewing
0-99 hours timer range
In this guide
Moisture in 3D printing filament causes significant problems like stringing and poor adhesion. A dedicated filament dryer keeps your spools dry and ensures consistent extrusion during every print job.
We analyzed ten leading filament dryer models based on heating technology, capacity, and user feedback. Our comparison highlights the best options for hobbyists and professionals seeking reliable moisture control.
Each product review details specific features, pros, and cons to help you decide. Prices and availability change frequently, so verify current details on the official product pages before purchasing.
Top 3 Picks for Best Filament Dryer for 3D Printing
Creality Filament Dryer Box 4 Spools
4.6Editor score
Holds 4 standard 1kg spools
Dual independent heating chambers
Industry-first touch UI
SUNLU S4 3D Printer Filament Dryer
4.5Editor score
4 spool capacity for efficiency
350W PTC heater power
8 filament exit holes
Top 10 Best Filament Dryer for 3D Printing in 2026 Compared
The following comparison table outlines the key specifications and features of all ten filament dryers reviewed in this guide to facilitate quick decision making.
ProductsSpecificationsEditor scorePrice
Best Budget
Comgrow 3D Printer Filament Dryer Box
Inner size 9.29×6.49×9.13 inch
Adjustable temp 40 to 50 degrees C
Silicone cable sheath outlet
Stores 2 rolls of 1kg spools
4.4Editor score
Editor's Choice
SUNLU Filament Dryer Box 2026 New Upgrade S1 Plus
Fast drying with fan design
Visual LCD display for monitoring
Temp range 35 to 55 degrees C
Max capacity 210x89mm height
4.3Editor score
Editor's Choice
Creality Filament Dryer Box 4 Spools
200W PTC heats up to 85 C
Dual heating chambers efficiency
Silicone-sealed enclosure prevents moisture
Customize temps 50 to 85 degrees C
4.6Editor score
SUNLU S4 3D Printer Filament Dryer
External dims 460x220x310mm
350W PTC heater efficiency
Three high-quality circulation fans
Timer setting range 0 to 99 hours
4.5Editor score
2026 New Creality Space PI Filament Dryer Plus
Upgraded PTC 360 hot-air heating
110W PTC heater for uniform drying
3.7-inch touch screen display
One-key set for 12 filament types
4.4Editor score
Polymaker Filament Dryer & Storage Box Polydryer
Consistent drying performance design
Dry store and print without breaking seal
Built-in hygrometer monitoring included
Heat seal desiccant protection
4.3Editor score
Creality 2026 New Upgrade Filament Dryer Box Pro
Upgraded PTC solution heats quickly
Thermal insulation cotton inner wall
Adjustable temp 45 to 65 degrees C
Countdown timer display for drying hours
4.3Editor score
SUNLU S4 3D Printer Filament Dryer
4 spool capacity for efficiency
3 circulation fans for even drying
8 filament exit holes support
Compatible with multiple spool types
4.6Editor score
SUNLU 3KG Filament Dryer SP2 & Storage Box
Large enough to hold 2 rolls
15min efficient heating to 70 C
Superior sealing storage with gaskets
Fit larger spool up to 3kg
4.4Editor score
SUNLU Filament Dryer S2
Large capacity 265x274x118mm
Fast heating and even drying
Touch screen interface for settings
Translucent lid enables viewing
4.3Editor score
1. Creality Filament Dryer Box 4 Spools – Best Overall Filament Dryer for 3D Printing
Creality Filament Dryer Box 4 Spools
Holds 4 standard 1kg spools
Dual independent 200W heating
Industry-first drying scene touch UI
Extends filament shelf life
The Creality Space Pi X4 holds an impressive 4.6 rating from users and offers a spacious storage solution for high-volume 3D printing users. Its dual independent heating chambers allow for faster moisture removal compared to standard single-chamber dryers.
Pros
- High capacity for multiple spools
- Dual heating chambers for speed
- Precise temperature control options
- Silicone-sealed enclosure design
- Clear illuminated window for monitoring
Cons
- Higher price point than basics
- Large footprint on desk
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This unit excels in temperature precision, allowing users to customize temps from 50 to 60 degrees Celsius for common materials or unlock up to 85 degrees Celsius for advanced filaments like ABS and PC. The industry-first touch UI provides real-time display of drying conditions.
While the price is higher than entry-level models, the dual chambers and high capacity justify the investment for professionals. The enclosure maintains humidity during pauses and the illuminated window lets you monitor spools without breaking the seal.
This dryer is ideal for studios or workshops printing daily with multiple materials. It effectively eliminates bubbling and stringing issues, ensuring consistent high-quality prints by keeping filament moisture-free for hours not days.
Dual Chamber Efficiency
The dual heating chambers remove moisture 30% faster than single-chamber dryers, ensuring your filament is print-ready in hours rather than waiting days for complete drying.
Sealed Storage Design
The silicone-sealed enclosure prevents moisture re-absorption 24/7, allowing you to switch from active drying to long-term storage without exposing the filament to ambient humidity.
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2. SUNLU S4 3D Printer Filament Dryer – Best Premium Filament Dryer for 3D Printing
SUNLU S4 3D Printer Filament Dryer
4 spool capacity for efficiency
350W PTC heater power
8 filament exit holes support
Adjustable temp 35 to 70 degrees C
The SUNLU S4 earns a 4.5 rating and stands out with its powerful 350W PTC heater and capacity to dry up to four 1kg filaments simultaneously. This model is designed for serious makers who need reliability and volume.
Pros
- Large 350W heater for heat
- Multiple exit holes for setup
- Three circulation fans for even air
- Wide material compatibility range
- DIY customization options included
Cons
- Heavy weight at 4KG
- Requires significant desk space
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Its three high-quality fans ensure consistent temperature across the entire area for more even drying with 360 surround heating. The eight filament exit holes allow for multiple printers and various loading angles to improve workflow.
Despite its large size and weight, the dryer offers great flexibility including the option to modify it for 3kg rolls or use it as a shoe dryer. The temperature range of 35 to 70 degrees Celsius covers nearly all common and technical filaments.
Choose this model if you run multiple printers or need to dry large batches of filament efficiently. It enhances printing quality significantly when drying while printing and supports a wide range of materials from PLA to Nylon.
Powerful Heating Core
The 350W PTC heater offers safety and higher heating efficiency, specifically noted as 50% higher than the previous FilaDryer S2 model for faster results.
Versatile Exit Options
Eight filament exit holes ensure smoother loading and printing by accommodating multiple printers and various filament loading angles in a single setup.
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3. SUNLU Filament Dryer S2 – Best Budget Filament Dryer for 3D Printing
SUNLU Filament Dryer S2
Large capacity 265x274x118mm
Translucent lid enables viewing
0-99 hours timer range
Fast heating and even drying
The SUNLU Filament Dryer S2 receives a 4.3 rating and serves as an excellent entry point for users wanting to improve print quality without a large investment. It focuses on reviving damp filament and keeping it dry during printing.
Pros
- Affordable price point option
- Translucent lid for checking
- User-friendly touch screen
- Revives damp filament effectively
- Large capacity for standard spools
Cons
- No built-in humidity monitor
- Spindle design may vary
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Its large capacity accommodates standard spools easily while the translucent lid lets you check on the filament without opening the lid. The touch screen makes setting different dry temperatures and times simple for all users.
While it lacks the advanced monitoring features of premium models, it effectively removes excess moisture to save you money on wasted filament. The customizable timer and temperature settings allow for specific needs.
This dryer is perfect for hobbyists who print occasionally and need a reliable way to prevent stringing and poor adhesion. It ensures superior printing results by keeping filament dry in humid locations like basements.
Simple Operation
The user-friendly touch screen ensures users can quickly dry their filaments with just a tap to set temperatures for different types of materials.
Filament Revival
Designed to remove excess moisture and revive old filament, saving time and money by avoiding the need to replace damp spools entirely.
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4. SUNLU Filament Dryer Box 2026 New Upgrade S1 Plus – Best Feature-Rich Budget Option
SUNLU Filament Dryer Box 2026 New Upgrade S1 Plus
Fast drying with fan design
Visual LCD display for monitoring
Temp range 35 to 55 degrees C
Max capacity 210x89mm height
The SUNLU S1 Plus boasts a 4.3 rating and solves stringing and clogging problems with an upgraded fan design that speeds up water discharge from filaments. It features a visual LCD screen to detect temperature and humidity accurately.
Pros
- Fan design speeds up drying
- Accurate temperature detection display
- Compatible with many brands
- Personalized temperature settings
- Improved surface smoothness
Cons
- Smaller capacity than S4
- Limited max temperature range
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Its personalized settings allow adjustment of temperature and time according to different filaments and environments, with a range from 35 to 55 degrees Celsius. This ensures the print quality is better with smoother surfaces.
While it has a smaller capacity compared to the S4, it is ideal for standard 1kg spools and supports various materials including TPU and Nylon. The fan design reduces the impact of wet weather on printing significantly.
Buy this if you want a compact dryer with clear visibility and fan-assisted drying for everyday materials. It helps maintain good layer adhesion and provides reliable technical support for any questions.
Fan-Assisted Drying
The upgraded filament dryer adds a fan design speeding up the discharge of excess water from 3D printer filaments for faster preparation.
Visual Feedback
A 2 inch LCD screen allows you to hold the left button to change dry time and press the right button to change temperature settings easily.
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5. Comgrow 3D Printer Filament Dryer Box – Best Value Compact Option
Comgrow 3D Printer Filament Dryer Box
Inner size 9.29×6.49×9.13 inch
Stores 2 rolls of 1kg spools
Silicone cable sheath outlet
Adjustable temp 40 to 50 degrees C
The Comgrow dryer box holds a 4.4 rating and offers a large storage volume that fits 2 rolls of 1kg spools comfortably. Its internal heating during printing keeps a dry storage environment and prevents layer migration.
Pros
- Good storage volume for 2 rolls
- Silicone sheath protects filament
- Real-time LCD monitoring
- Simple operation with touch buttons
- After-sales technical support
Cons
- Max temperature limited to 50 C
- Requires manual error checking
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Real-time monitoring of temperature and humidity is handled via a 2-inch LCD screen and touch buttons for easy operation. The adjustable temperature range from 40 to 50 degrees Celsius suits common materials like PLA and PETG.
The outlet structure adopts a silicone cable sheath and Teflon tube for smooth feeding, which is crucial for consistent printing. The sealed box with snap button structure ensures good performance when not in use.
This unit is suitable for users needing a reliable spot to dry and store filaments with clear monitoring features. It avoids entanglement and clogging issues and provides 24-hour technical solutions for any problems.
Storage and Drying
The machine works only when the work state is displayed on the screen, providing a dry storage environment for 3D printer filaments during printing.
Outlet Design
The outlet is smooth and can be covered with a plug when not in use, keeping the consumables dry and protecting the filament from dust.
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6. SUNLU 3KG Filament Dryer SP2 & Storage Box – Best for Large Spools
SUNLU 3KG Filament Dryer SP2 & Storage Box
15min efficient heating to 70 C
Superior sealing storage with gaskets
Fit larger spool up to 3kg
HD LCD touch screen control
The SUNLU SP2 is rated 4.4 by users and features a 250W PTC heating element that reaches 70 degrees Celsius in just 15 minutes for efficient drying. It includes a base storage box with excellent sealing performance.
Pros
- Quick heating to 70 degrees C
- Storage box included with seal
- Supports 3kg spool size
- Real-time humidity monitor included
- Detachable dryer and base
Cons
- Base can be heavy
- Price higher than basic models
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The dryer and base are detachable so you can store filament directly after drying or feed it into your printer while it is drying. The storage box lid has two sliding latches to ensure a great seal against moisture.
It supports larger spools up to 3kg with rollers and also fits smaller 250g spools on the bar holder. The HD LCD touch screen provides clear readings of temperature and humidity with different presets for various filament types.
This model is ideal for heavy users who need fast heating and storage in one unit. The integrated hygrometer helps track interior humidity and prevents moisture-related issues like stringing during prints.
Fast Heating Technology
The 360-degree surround heating ensures even drying of your filament spool and runs quietly compared to other dryers for a better environment.
All-in-One Storage
As a storage box it has a sliding latch to ensure a great seal with gaskets to hold the filament temp well and keep it dry.
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7. 2026 New Creality Space PI Filament Dryer Plus – Best for Advanced Filaments
2026 New Creality Space PI Filament Dryer Plus
Upgraded PTC 360 hot-air heating
110W PTC heater for uniform drying
3.7-inch touch screen display
One-key set for 12 filament types
The Creality Space PI Plus has a 4.4 rating and employs a unique 110W PTC heater to warm up the space ensuring uniform drying unlike models with heating pads. It features a 3.7-inch touch screen for easy operation.
Pros
- One-key presets for 12 filaments
- 360-degree hot-air circulation
- Large touch screen for operation
- 48 hours timer function
- Uniform drying for high performance
Cons
- Dual spool capacity only
- Requires careful handling
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It supports up to 12 types of filaments including high-performance composites like PLA-CF and PA-CF with one-key temperature settings. The timer allows heating duration to be set from 0 to 48 hours for flexibility.
The built-in fan circulates hot air 360 degrees for uniform heating and the touch screen supports switching between Celsius and Fahrenheit for convenience. This model ensures consistent high-quality prints by keeping filaments dry.
Choose this dryer if you need precise control over drying parameters for engineering materials. The touch screen and presets simplify the process while the effective drying improves printing results significantly.
Uniform Heating Design
Our model with the PTC heater ensures uniform drying which is durable and energy-saving and also eco-friendly for modern users.
High Performance Support
The device supports high-performance composite filaments and free adjustment of temperature from 45 to 70 degrees Celsius for specific needs.
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8. Polymaker Filament Dryer & Storage Box Polydryer – Best for Hygroscopic Materials
Polymaker Filament Dryer & Storage Box Polydryer
Consistent drying performance design
Dry store and print without breaking seal
Built-in hygrometer monitoring included
Heat seal desiccant protection
Polymaker's Polydryer holds a 4.3 rating and is designed to help keep filament in better condition for printing by reducing moisture-related issues like clogging and layer inconsistency. It promotes even airflow and controlled heating.
Pros
- Consistent drying performance support
- Move from drying to sealed storage
- Hygrometer helps judge status
- Wide range of materials supported
- Desiccant protection added
Cons
- No active heater listed
- Requires manual drying cycle
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It lets you move from drying to sealed storage and direct filament feeding with less exposure to ambient moisture. A built-in hygrometer helps you judge filament status with less guesswork between print sessions.
The storage box combines heated drying sealed storage protection and desiccant support to maintain better filament condition over time. It supports materials like PA Nylon and ABS and is compatible with different filament diameters.
This solution is ideal for users who need a complete moisture-control routine before during and between prints. It ensures your filament stays better prepared without breaking the seal between drying and printing.
Integrated Protection
The Polydryer makes it easier to monitor track and maintain dry conditions for your filament with less guesswork in daily management.
Complete Routine
This integrated approach includes heat seal and desiccant protection designed for users who want a more complete routine for maintenance.
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9. Creality 2026 New Upgrade Filament Dryer Box Pro – Best for Easy Setup
Creality 2026 New Upgrade Filament Dryer Box Pro
Upgraded PTC solution heats quickly
Thermal insulation cotton inner wall
Adjustable temp 45 to 65 degrees C
Countdown timer display for drying hours
The Creality Space PI SE is rated 4.3 and uses an upgraded PTC solution to heat up quickly circulating hot air 360 degrees inside the chamber evenly. It can be heated to 65 degrees Celsius within 15 minutes for efficiency.
Pros
- Quick heat up to 65 C
- Easy to use display knob
- Thermal insulation anti-scald
- Personalized drying settings
- Compatible with most 1kg spools
Cons
- Requires vacuum storage after
- Basic display screen
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It solves problems of drawing clogging and poor adhesion during printing to improve quality. The display screen and knob make it easy to operate with real-time humidity monitoring and drying hours displayed via a countdown timer.
Thermal insulation cotton on the inner wall keeps warm and anti-scald when printing. You can set different drying temperatures and time according to ambient temperature humidity and filament type for precise control.
This dryer is best for users wanting no assembly and right-out-of-the-box usability. Pairing with Teflon tubes makes filament feeding smoother and it fits most 1kg spools including PLA PETG and ABS.
Efficient Heating
The built-in fan circulates the hot air through 360 degrees inside the chamber evenly heating the entire chamber for consistent results.
Simple Interface
Real-time humidity monitoring and drying hours are displayed via a countdown timer allowing you to track drying conditions effortlessly.
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10. SUNLU S4 3D Printer Filament Dryer – Best for Large Batch Drying
SUNLU S4 3D Printer Filament Dryer
4 spool capacity for efficiency
3 circulation fans for even drying
8 filament exit holes support
Adjustable temp 35 to 70 degrees C
This SUNLU S4 model has a 4.6 rating and is capable of drying up to four 1kg 3D printer filaments simultaneously to enhance drying efficiency and printing quality. It features a 350W PTC heater for safety and higher heating efficiency.
Pros
- High capacity for batches
- Efficient 350W heater
- Multiple exit hole options
- Compatible with multiple spools
- DIY modification possibilities
Cons
- Heavy unit at 4KG
- Requires power source
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Three circulation fans ensure consistent temperature across the entire area for more even drying with 360 surround heating. It offers eight filament exit holes for multiple printers and various filament loading angles for smooth loading.
The timer setting range is 0 to 99 hours allowing users to adjust parameters to suit filament conditions easily. It supports a wide range of materials including PLA PLA Meta PETG ABS and Nylon with different diameters.
This unit is ideal for studios needing to process large batches efficiently. It can be modified to dry 3kg large rolls and provides comprehensive packing accessories like PTFE tubes and silicone plugs for setup.
Enhanced Efficiency
The S4 can dry up to four 1kg 3D printer filaments enhancing drying efficiency and printing quality when drying while printing.
High Heating Power
It is equipped with a 350W PTC heater offering safety and higher heating efficiency which is 50% higher than the FilaDryer S2.
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Buying Guide – How to Choose the Best Filament Dryer for 3D Printing
Choosing the right filament dryer involves considering capacity heating speed and material support to match your 3D printing workflow effectively.
Capacity and Size
Capacity determines how many spools you can dry at once. Models range from storing two rolls to four or more including some that accommodate 3kg spools. Ensure the internal dimensions fit your spool types without crowding.
Choose a size that matches your volume needs and available desk space for efficiency.
Heating Technology
Advanced dryers use PTC heaters for consistent temperatures and faster drying times compared to basic heating pads. Look for models with fans for 360 degree hot air circulation to ensure even drying without hot spots.
Prioritize units with fan circulation and PTC heaters for uniform results.
Temperature Range
Standard dryers cover 35 to 65 degrees Celsius which suits PLA PETG and TPU. Advanced units reach up to 85 degrees Celsius for engineering materials like ABS PC and Nylon that require higher heat to remove moisture.
Verify the max temperature meets the requirements of your technical filaments.
Humidity Monitoring
Built-in hygrometers let you see real-time humidity levels inside the chamber which helps confirm when filaments are dry. Some units have LCD screens showing temperature and humidity data for precise control.
Select models with visual displays to track drying progress accurately.
Sealing Quality
Effective sealing prevents ambient humidity from re-entering the chamber. Look for silicone gaskets cable sheaths and snap buttons that close tightly. Some units offer dual functionality to act as storage boxes during printing pauses.
Ensure the unit seals well to maintain dry conditions after the drying cycle ends.
Exit Ports
Multiple exit holes with Teflon tubes or silicone sheaths make feeding filament smoother and prevent tangles. Models with eight exits support multiple printers simultaneously while simple models usually have one or two.
Consider the number of ports needed for your printer setup to streamline feeding.
Material Compatibility
Most dryers handle 1.75mm and 2.85mm diameters. Check if the unit supports the specific materials you use such as TPU Nylon or composite filaments. Some units offer presets for these materials to simplify operation.
Confirm compatibility with your common filament types before purchasing.
Timer and Controls
A timer function allows you to set drying duration from zero to 99 hours. User-friendly interfaces with touch screens or knobs help adjust settings easily. Some models offer one-key presets for specific filaments to save time.
Opt for intuitive controls that suit your technical comfort level and needs.
How to Use and Care for Your Filament Dryer for 3D Printing
Place your spool inside the chamber and connect the filament tube through an exit hole. Ensure the seals are closed tightly before starting the machine to prevent moisture ingress.
Set the temperature and timer according to the filament type. For most materials like PLA 50 degrees Celsius for several hours is sufficient. Check humidity monitors if available to confirm dryness.
Clean the dryer periodically by wiping inside the chamber to remove dust. Replace silicone seals if they wear out over time and store filament in vacuum bags after drying for long-term protection.
Frequently Asked Questions
How often should I dry my filament?
Frequency depends on your storage conditions and filament hygroscopy. Print often in humid environments dry spools weekly. If storing for months, use a desiccant and check moisture before printing.
Can I leave the dryer running overnight?
Yes, most units have timers and auto-shutoff features for safety. Set the timer for the needed duration to avoid overheating or unnecessary energy consumption during sleep hours.
Does drying ruin the filament?
Proper drying within recommended temperature ranges preserves material integrity. Exceeding max temperatures can warp or degrade the plastic so always follow manufacturer guidelines for specific filaments.
What materials need the most drying?
Materials like Nylon PA PETG and TPU are highly hygroscopic and absorb moisture quickly. These require longer drying cycles compared to PLA which is less sensitive to humidity.
Is a dryer better than airtight storage?
A dryer actively removes moisture while airtight storage with desiccant prevents new moisture absorption. For best results use a dryer to prep filament then store it sealed to keep it dry.
Can I dry multiple filaments at once?
Yes, models with multi-spool capacity like the S4 or X4 allow drying multiple spools simultaneously. Ensure air circulates freely around each spool for even results.
Final Thoughts on Choosing the Best Filament Dryer for 3D Printing
The top picks range from budget friendly models like the SUNLU S2 to advanced options like the Creality Space Pi X4 for high volume users. Each offers reliable moisture control to prevent print failures.
Prioritize capacity and temperature range that match your material needs and workspace size. Units with PTC heaters and fans ensure consistent drying performance across different filament types.
Verify current prices and availability on Amazon before purchasing since deals vary regularly. Choosing the right dryer will significantly improve your print quality and save wasted filament costs.