Polymaker Polydryer Filament Storage Box
4.4Editor score
Built-in hygrometer monitor
Desiccant compatible design
Sealed storage during printing
In this guide
Filament dryer boxes are essential tools for maintaining print quality by preventing moisture absorption in sensitive materials like nylon and PETG. These devices actively remove water from spools before and during printing to avoid common defects such as stringing and bubbling.
We evaluated ten top-rated models based on heating technology, capacity, user interface, and sealing effectiveness. Our analysis covers budget-friendly options alongside premium multi-spool systems to suit every printer setup and budget requirement in the current market.
Each pick highlights key specifications and real-world performance traits to help you make an informed decision. Please note that product availability and pricing may change frequently, so verify current details before purchasing your next filament dryer box.
Top 3 Picks for Best Filament Dryer Box
Creality Filament Dryer Box 4 Spools
4.6Editor score
Dual 200W heating chambers
Holds four 1kg spools
85C max temperature range
Official Creality Filament Dryer Space Pi X4
4.6Editor score
Independent dual chamber control
Eight filament output holes
Energy saving single mode
Top 10 Best Filament Dryer Box in 2026 Compared
The following table provides a side-by-side comparison of all ten selected filament dryer boxes. Review the core specifications and features to identify which model aligns best with your specific printing requirements and workspace constraints.
ProductsSpecificationsEditor scorePrice
Editor's Choice
SUNLU S1 Plus
Upgraded fan drying design
LCD temperature display
35 to 55 Celsius
Holds two spools capacity
4.3Editor score
Editor's Choice
Creality Space Pi X4
Dual independent 200W
Holds four 1kg spools
50 to 85 Celsius
Illuminated window viewing
4.6Editor score
Best Premium
Comgrow SH01
Large storage volume interior
Silicone cable sheath outlet
40 to 50 Celsius
Auto shut down feature
4.4Editor score
Polymaker Polydryer
Built-in hygrometer display
Airtight sealed enclosure
No active heating source
Desiccant pocket included
4.4Editor score
SUNLU S2
Spindle continuous spinning
Translucent lid inspection
35 to 70 Celsius
Large touch screen
4.3Editor score
Comgrow SH02
150W PTC heater
Two spool holes
40 to 70 Celsius
Nine filament presets
4.4Editor score
Creality Space PI 2026
110W PTC heater
360 degree hot air
3.7 inch touch screen
Twelve filament presets
4.4Editor score
Creality Space PI Plus
Dual spool capacity
Real-time humidity monitor
45 to 70 Celsius
48 hours timer
4.4Editor score
Creality Space Pi X4L
Dual 200W chambers
Four spool capacity
50 to 75 Celsius
Silicone sealed enclosure
4.5Editor score
Creality Space Pi X4 DB-05
Dual independent PTC
Eight filament output holes
Energy saving single mode
85 Celsius maximum
4.6Editor score
1. SUNLU S1 Plus – Best Budget Dryer
SUNLU Filament Dryer Box 2026 New Upgrade S1 Plus
Upgraded fan design
Visual LCD display
35 to 55 Celsius
High filament compatibility
The SUNLU S1 Plus ranks as our top choice for budget-conscious users seeking reliable moisture control. With a 4.3 star rating, it offers upgraded drying technology that solves common stringing and clogging issues effectively.
Pros
- Affordable price point
- Fast drying with fan
- Clear temperature display
- Adjustable settings
- Good layer adhesion
Cons
- Lower max temperature
- Smaller capacity
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Its standout feature is the added fan design which speeds up the discharge of excess water from filaments. The 2 inch LCD screen allows you to accurately detect and display temperature and time for precise monitoring.
While the temperature range tops out at 55 Celsius, this is sufficient for most common materials like PLA and PETG. The personalized settings let you adjust based on different environmental conditions easily.
Anyone looking for an efficient entry-level dryer should consider this model. It provides high compatibility with major brands and ensures print quality improves significantly after using the drying box.
Fast Drying Technology
The upgraded fan design helps speed up moisture removal significantly compared to passive dryers.
Visual Control Panel
The LCD screen displays humidity, temperature, and time for better monitoring during operation.
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2. Creality Space Pi X4 – Best for High Volume
Creality Filament Dryer Box 4 Spools
Holds 4 spools
Dual heating chambers
85C max temp
Illuminated window
This Creality model is designed for high-volume users who need to dry multiple spools simultaneously. Its spacious design holds 4 standard 1kg spools or 2 large 2kg spools for ultimate storage capacity.
Pros
- Holds 4 spools
- Dual heating chambers
- 85C max temp
- Illuminated window
- Precise temperature control
Cons
- Higher price point
- Requires more space
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The dual independent 200W heating chambers remove moisture 30% faster than single-chamber dryers. You can reach temperatures up to 85C which is essential for engineering filaments like ABS and PC.
Beyond drying, it actively maintains humidity during printing pauses to prevent re-absorption. The touch UI allows customizing temps for different materials like PLA or high-performance composites easily.
If you have multiple printers or large storage needs, this dryer is the top pick. It extends filament shelf life and ensures consistent high-quality prints by eliminating bubbling and stringing.
Dual Chamber Efficiency
Two independent heating zones allow simultaneous drying of two types at different temperatures if needed.
High Volume Capacity
Store up to four standard spools in one unit to keep your printing workflow uninterrupted.
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3. Comgrow SH01 – Best Simple Storage
Comgrow 3D Printer Filament Dryer Box
Large storage volume
Silicone sheath outlet
40 to 50 Celsius
Auto shut down
The Comgrow SH01 offers a large storage volume with internal dimensions of 9.29 by 6.49 inches. It is compatible with all standard filament diameters and keeps filaments dry during printing effectively.
Pros
- Large storage volume
- Silicone sheath outlet
- 40 to 50 Celsius
- Auto shut down
- Great sealing performance
Cons
- Lower max temperature
- Auto shutdown limit
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Its outlet structure uses a silicone cable sheath for a smooth exit path. The real-time monitoring allows you to adjust temperature and humidity settings via a touch screen for easy operation.
Be aware that the maximum temperature is only 50 Celsius which may limit use with engineering plastics. The machine also has an auto shut down feature if the work state is not displayed.
This box is perfect for standard PLA and PETG printing where lower drying temps suffice. The snap button structure and sealed design ensure good performance when the sealing hole is managed correctly.
Sealed Design
The snap button structure and silicone sheath help maintain a dry environment during use.
Easy Operation
Hold the function button to change dry time and temperature settings simply on the screen.
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4. Polymaker Polydryer – Best Passive Storage
Polymaker Polydryer Filament Storage Box
Built-in hygrometer
Airtight sealed
No active heating
Desiccant support
The Polymaker Polydryer is a passive storage solution designed to protect filament between prints. It reduces exposure to humid air which helps lower stringing and bubbling issues effectively.
Pros
- Built-in hygrometer
- Airtight sealed
- No active heating
- Desiccant support
- Print without breaking seal
Cons
- No active heating
- Slower drying time
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Unlike active dryers, it combines a sealed enclosure with desiccant support to lock out moisture. The built-in hygrometer makes it easier to monitor storage conditions without guessing alone.
You can print without breaking the sealed setup which ensures better moisture protection during pauses. It is simple to use and fits neatly into your workspace for everyday workflow needs.
Choose this if you prioritize long-term storage over rapid drying. It extends filament life by keeping spools cleaner and drier while waiting for your next job to start.
Hygrometer Monitoring
The visible humidity reading helps you maintain a suitable environment for your filament.
Sealed Feeding
Designed to support filament feeding while spool remains inside for better protection.
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5. SUNLU S2 – Best Revival Option
SUNLU Filament Dryer S2
Spindle continuous spinning
Translucent lid
35 to 70 Celsius
Large touch screen
The SUNLU S2 is a powerful dryer designed to revive damp 3D printer filament. It uses a built-in spindle to ensure that the filament spins continuously for even drying results.
Pros
- Spindle continuous spinning
- Translucent lid
- 35 to 70 Celsius
- Large touch screen
- Simple and effective
Cons
- No dual chamber
- Heavier build
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Its large touch screen lets users easily set different dry temperatures and times with just a tap. The translucent lid enables you to check on the filament without having to open the lid.
Users can customize the drying time from 0 to 99 hours and temperature from 35 to 70 degrees Celsius. This high capacity and compatibility with different filament diameters make it versatile.
If you need to fix old filament or print in humid locations, this is a great choice. It improves the printing effect and optimizes the printing process for better print quality.
Even Drying
The built-in spindle spins filament continuously to ensure heat is distributed evenly.
Customizable Settings
Set drying time up to 99 hours and adjust temperature to suit specific material needs.
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6. Comgrow SH02 – Best Dual Spool Choice
Comgrow Filament Dryer Box
2 spool holes
150W PTC heater
40 to 70 Celsius
Nine filament presets
This Comgrow box is equipped with 2 filament holes allowing you to dry rolls of 1KG filament at the same time. It meets the needs of users to dry a wide range of filaments efficiently.
Pros
- 2 spool holes
- 150W PTC heater
- 40 to 70 Celsius
- Nine filament presets
- Intelligent safety protection
Cons
- Limited to 2 spools
- Fan alarm required
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The 360 degree PTC fast heater heats up faster and is more energy-efficient. It reaches 50C within 7 mins and 70C within 25 mins for uniform heating around the filament.
One key settings for 9 types of filaments make it easy to start work immediately. Intelligent safety protection automatically cuts off heating if the fan stops rotating to prevent burning.
For dual printing needs, this model saves space and time effectively. The sealing rings ensure consumables stay dry and protected from wet conditions throughout the process.
Fast Heating
The 150W PTC heater ensures rapid heating and uniform distribution for better drying.
Safety Features
Alarms sound and heating cuts off if the fan stops to protect the PTC module.
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7. Creality Space PI – Best Upgraded PTC
2026 New Creality Space PI Filament Dryer
110W PTC heater
360 degree hot air
3.7 inch touch
Twelve filament presets
The Creality Space PI employs a unique 110W PTC heater to warm up the space for uniform drying. This technology sets it apart from heating pads that often result in uneven drying results.
Pros
- 110W PTC heater
- 360 degree hot air
- 3.7 inch touch
- Twelve filament presets
- Power-off memory function
Cons
- No dual chamber
- Price variance
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It features a 3.7-inch touch screen for easy operation and tracking drying conditions. The touch screen supports switching between Celsius and Fahrenheit temperatures for convenient settings use.
One-key settings support up to 12 types of filaments including high-performance composites like PA-CF. The parameter power-off memory function remembers your settings after a power outage to save time.
This dryer is ideal for those who value uniform drying and ease of use. It keeps filaments dry and free from moisture for consistent high-quality prints in any environment.
Uniform Air Heating
The PTC heater ensures uniform drying unlike standard heating pads that create hot spots.
Memory Function
The device restarts with previous settings saved after a power outage to avoid reconfiguring.
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8. Creality Space PI Plus – Best Dual Spool+
2026 New Creality Space PI Filament Dryer Plus
Dual spool capacity
Real-time humidity monitor
45 to 70 Celsius
48 hours timer
The Creality Space PI Plus is a dual-spool filament dryer box that supports real-time humidity monitoring. It employs a unique 110W PTC heater to warm up the space for uniform drying.
Pros
- Dual spool capacity
- Real-time humidity monitor
- 45 to 70 Celsius
- 48 hours timer
- Uniform hot air
Cons
- Similar to base PI
- Limited max temp
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The touch screen makes it simple to track drying conditions and switch between temperature scales easily. One-key settings support up to 12 types of filaments including high-performance composites.
The heating duration can be freely set from 0 to 48 hours allowing the filaments to be fully dried for better printing results. The real-time humidity monitor ensures the environment stays dry.
For users needing dual spool drying with humidity tracking, this model is highly effective. It keeps your filaments dry and free from moisture for consistent high-quality prints always.
Humidity Monitoring
Real-time humidity monitoring ensures you maintain dry conditions throughout the drying process.
Dual Spool Support
Designed for dual spool drying which increases efficiency for multi-printer setups.
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9. Creality Space Pi X4L – Best Capacity+
Creality Filament Dryer Box 4 Spools X4L
Dual 200W chambers
Holds 4 spools
50 to 75 Celsius
Silicone sealed
The Space Pi X4L holds 4 standard 1kg spools or 2 large 2kg spools making it ideal for high-volume users. Its spacious and organized storage allows for universal compatibility with 1.75mm and 2.85mm filaments.
Pros
- Dual 200W chambers
- Holds 4 spools
- 50 to 75 Celsius
- Silicone sealed
- Rapid drying
Cons
- Large footprint
- Higher cost
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Dual independent 200W heating chambers remove moisture 30% faster than single-chamber dryers. It actively maintains humidity during printing pauses to prevent moisture re-absorption 24/7 with a sealed enclosure.
The touch UI allows customizing temps for different materials like PLA or engineering filaments. You can monitor spools via illuminated window without breaking humidity control or opening the unit.
If you need rapid drying and large capacity, this model is the best choice. It extends filament shelf life and ensures consistent high-quality prints by eliminating bubbling and stringing issues.
Dual Chamber Speed
Two independent 200W chambers remove moisture faster than single-chamber dryers.
Sealed Maintenance
Silicone-sealed enclosure prevents moisture re-absorption while maintaining humidity during pauses.
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10. Creality X4 DB-05 – Best Dual Chamber
Official Creality Filament Dryer Space Pi X4 DB-05
Dual independent PTC
Eight filament output holes
Energy saving single mode
85 Celsius max
The Official Creality Filament Dryer revolutionizes drying with 4 spools dry and print at once for maximum efficiency. It features dual independent temperature control allowing simultaneous drying of two types at different temps.
Pros
- Dual independent PTC
- Eight filament output holes
- Energy saving single mode
- 85 Celsius max
- High efficiency
Cons
- Requires trays
- Pricey
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It has eight filament holes and PTFE tubing allowing you to print on four printers at the same time. The dual 200W PTC heaters are paired with insulated chambers to improve heating efficiency significantly.
This model reaches up to 85 Celsius which is ideal for engineering filaments like PA, PAHT, and PC. You can choose between single or dual chamber modes to save up to 40 percent energy.
For professional or high-volume environments, this dryer is the top recommendation. It ensures continuous and effective drying while saving energy and allowing flexible workflows for multiple users.
Independent Control
Dual independent PTC heaters allow two filament types to be dried at different temperatures.
Multi-Printer Output
Eight filament output holes allow printing on four printers simultaneously for maximum efficiency.
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Buying Guide – How to Choose the Best Filament Dryer Box
Selecting the right filament dryer box involves understanding your volume needs and material types. This guide breaks down key factors to consider.
Capacity and Spool Size
Consider how many spools you need to dry at once. Single spool boxes are compact but multi-spool models can save time for high-volume users.
Choose a capacity that matches your typical workflow. If you print with multiple materials, a larger unit may reduce downtime.
Heating Technology
Look for PTC heaters which offer faster and more even heating than traditional pads. Dual chamber systems allow for simultaneous drying at different temps.
Efficiency matters. Ensure the heater can reach the temps required for your engineering filaments without consuming too much power.
Temperature Range
Check the maximum temperature. Some boxes go up to 50C which suits PLA, while others reach 85C for PC or ABS.
Ensure the range covers all materials you use. A wider range offers more versatility for diverse printing projects.
Sealing Quality
The box must maintain a seal during printing to prevent moisture reabsorption. Look for silicone seals or airtight designs.
Good sealing is critical for storage mode. Without it, the benefits of drying are lost during pauses.
User Interface
A clear LCD or touch screen helps you monitor humidity and temps easily. Presets for common filaments save time setting parameters.
Simpler controls can reduce errors. Ensure the interface allows precise adjustments for sensitive materials.
Safety Features
Look for overheat protection and auto-shutdown features. Safety is paramount when using high heat in enclosed spaces.
Alarms for fan failure can prevent damage to the unit. These features add peace of mind during long drying cycles.
Filament Compatibility
Ensure the box supports your filament diameters such as 1.75mm or 2.85mm. Some models are limited in this aspect.
Check if there are PTFE tubes for guiding filament. Proper routing ensures smooth extrusion during drying.
Build Quality
Durable materials and sturdy construction extend the life of the dryer. Look for translucent lids to check spools without opening.
A well-made unit resists heat damage over time. This ensures consistent performance for years of use.
How to Use and Care for Your Filament Dryer Box
To start, ensure the filament spool is placed correctly inside the box with the feeding line routed through the PTFE tube. Close the lid securely to engage any silicone seals for airtight protection.
Select the appropriate preset for your material type or manually set the temperature and time. Once started, the box will circulate hot air to remove moisture before printing.
Regularly clean the intake vents to prevent dust buildup. Check the sealing rings occasionally to ensure no air gaps develop over time for optimal performance.
Frequently Asked Questions
Do I need a dryer for PLA?
Yes, PLA can absorb moisture especially in humid environments. A dryer helps prevent bubbling and poor layer adhesion. Even if the filament looks dry, humidity can affect print quality significantly.
How long should I dry filament?
Drying time varies but 4 to 6 hours is often sufficient for standard materials. Engineering filaments like nylon may require longer cycles. Check the product guide for recommended times.
Can I dry multiple spools at once?
Yes if you have a multi-spool model designed for it. Single-spool boxes may not accommodate multiple spools properly. Always check the capacity specs before loading.
Does the dryer work while printing?
Many modern dryers allow feeding filament during operation. This keeps the spool dry throughout the job. It is essential for long prints that expose filament to air.
What is the best temperature for drying?
The best temperature depends on the filament type. PLA typically requires lower temps around 45C while ABS may need up to 75C. Always refer to the manufacturer settings.
How do I store dried filament?
Store dried filament in a dry place or inside the sealed box. Use silica gel packs to maintain dryness over time. Avoid leaving spools exposed to humid air unnecessarily.
Will a dryer fix damaged filament?
It can revive slightly damp filament but cannot fix physical damage. If the filament is brittle or deformed, replacement may be necessary. Drying helps restore moisture content.
Are dryers safe to leave unattended?
Most have safety features like auto-shutdown but leaving them unattended is not recommended. Ensure the area is clear of flammable materials. Always follow the manual safety guidelines.
Final Thoughts on Choosing the Best Filament Dryer Box
We reviewed ten top options for the filament dryer box category in October 2026. From the budget SUNLU S1 Plus to the high-volume Creality Space Pi X4, each model offers unique advantages for different needs.
Prioritize features like heating speed and sealing quality when selecting. High-volume users should consider dual chamber systems while casual users might prefer simple storage solutions.
Remember to check current prices and availability as these change frequently. Invest in a dryer that matches your specific printing demands to ensure consistent high-quality results.