Creality Filament Dryer Box 4 Spools
4.6Editor score
Holds up to four standard spools
Dual independent heating chambers
Precise temperature control for engineering materials
In this guide
Finding the right filament dryer box is crucial for maintaining print quality and preventing moisture-related issues like stringing or bubbling. These devices help keep your spools dry during storage and active printing sessions.
We compared ten leading models based on capacity, heating technology, temperature control, and overall user feedback. Our analysis covers everything from budget-friendly single spool units to high-volume multi-spool solutions.
Each pick highlights unique features and performance strengths to help you match a dryer to your specific printing needs. Please note that product availability and pricing may change over time.
Top 3 Picks for Best Filament Dryer Box
SUNLU Filament Dryer Box 2026 New Upgrade S1 Plus
4.3Editor score
Fast drying with built-in fan
Visual LCD display for monitoring
Personalized temperature and time settings
Polymaker Polydryer Filament Storage Box
4.4Editor score
Airtight sealed enclosure design
Built-in hygrometer for monitoring
Compatible with various filament types
Top 10 Best Filament Dryer Box in 2026 Compared
This side-by-side comparison highlights the key specifications and capabilities of each featured filament dryer box to help you make an informed decision for your printing setup.
ProductsSpecificationsEditor scorePrice
Editor's Choice
SUNLU S1 Plus
Capacity for one large spool
Temperature range 35 to 55 C
Built-in fan for faster drying
LCD display for real-time monitoring
4.3Editor score
Editor's Choice
Creality Space Pi X4
Holds up to four standard spools
Dual independent heating chambers
Up to 85 degrees Celsius max
Silicone sealed enclosure design
4.6Editor score
Best Premium
Comgrow SH01
Holds two 1kg spools easily
Temperature range 40 to 50 C
Silicone cable sheath outlet
Touch screen controls for settings
4.4Editor score
Polymaker Polydryer
Airtight storage with desiccant support
Built-in hygrometer for humidity
Feeding while spool remains stored
Compatible with many filament types
4.4Editor score
SUNLU Filament Dryer S2
Large capacity for various spool sizes
Customizable drying time up to 99 hours
Translucent lid for visibility
Spindle ensures even filament rotation
4.3Editor score
Comgrow SH02
Holds two 1kg spools at once
150W PTC fast heater technology
One-key settings for nine filament types
Intelligent safety protection features
4.4Editor score
Creality Space Pi
360 degree hot air heating
3.7 inch touch screen display
One-key settings for twelve filaments
48 hour timer function included
4.4Editor score
Creality Space Pi Plus
Dual spool drying capability
Real-time humidity monitor included
360 degree hot air heating
Adjustable temperature range 45 to 70 C
4.4Editor score
Creality Space Pi X4L
Holds four 1kg spools max
Dual independent heating chambers
Up to 75 degrees Celsius max
Silicone sealed enclosure design
4.5Editor score
Official Creality Space Pi X4
Holds up to four standard spools
Dual independent temperature control
Up to 85 degrees Celsius max
Energy saving single or dual mode
4.6Editor score
1. SUNLU S1 Plus – Best Overall Filament Dryer Box
SUNLU Filament Dryer Box 2026 New Upgrade S1 Plus
One spool capacity max
35 to 55 Celsius range
LCD display for monitoring
Fan assisted drying system
The SUNLU Filament Dryer Box S1 Plus is a top-rated option designed to solve moisture-related printing problems. With a rating of 4.3 stars, it offers a balance of performance and ease of use for various 3D printing needs.
Pros
- Fast drying with integrated fan
- Clear visual display interface
- Adjustable settings for different filaments
- Good compatibility with standard spools
- Helps reduce common print issues
Cons
- Limited to single spool drying
- Fan may add slight noise
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Its standout feature is the upgraded fan design that speeds up the discharge of excess water from filaments. The 2 inch LCD screen allows you to accurately detect and display temperature, time, and humidity levels at a glance.
While it only handles one spool at a time, the personalized settings allow you to adjust temperature and time according to different materials. The sealing is effective enough to prevent re-absorption during printing pauses.
This dryer is ideal for hobbyists and small shops who need reliable drying without the cost of larger units. It effectively reduces stringing and poor adhesion caused by wet filament.
Enhanced Drying Efficiency
The integrated fan design actively circulates air to remove moisture faster than passive heating alone.
User-Friendly Controls
Simple button controls and a clear display make it easy to set specific parameters for any filament type.
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2. Creality Space Pi X4 – Premium Multi-Spool Solution
Creality Filament Dryer Box 4 Spools
Four spool capacity max
Dual independent heating chambers
85 Celsius maximum temperature
Silicone sealed enclosure
The Creality Space Pi X4 stands out as a premium choice for users who need to dry multiple spools simultaneously. With a strong rating of 4.6 stars, it offers industrial-grade features in a desktop-friendly package.
Pros
- Holds four standard spools easily
- Dual chambers for different temps
- High max temp for engineering plastics
- Illuminated window for monitoring
- Precise touch UI control
Cons
- Higher price point than others
- Larger physical footprint required
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Its dual independent heating chambers allow you to dry two different types of filaments at different temperatures at once. The 200W PTC heaters can reach up to 85 degrees Celsius, making it suitable for advanced materials like ABS and Nylon.
The storage capabilities are excellent, with silicone sealing that prevents moisture re-absorption 24/7. You can monitor spools via an illuminated window without breaking the humidity control seal during active printing sessions.
This dryer is perfect for professional studios or makers who use a variety of engineering filaments. It ensures consistent high-quality prints by extending filament shelf life and reducing waste significantly.
Dual Chamber Independence
Two separate heating zones allow simultaneous drying of different materials with distinct temperature requirements.
Advanced Material Support
High temperature capability unlocks support for tough engineering filaments that standard dryers cannot handle.
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3. Polymaker Polydryer – Best Budget Friendly Option
Polymaker Polydryer
Storage focus with desiccant
Built-in hygrometer included
Print while spool stored inside
Compatible with many filament types
The Polymaker Polydryer offers a straightforward approach to filament protection by focusing on sealed storage and humidity monitoring. It holds a rating of 4.4 stars and is designed for users who need reliable storage between prints.
Pros
- Airtight sealed enclosure design
- Includes built-in hygrometer
- Supports feeding during storage
- Good value for long term storage
- Simple easy to use design
Cons
- No active heating element
- Dependent on external desiccant
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Unlike active dryers, this unit relies on a sealed enclosure and desiccant support to lock out moisture. The built-in hygrometer makes it easy to track storage conditions without relying on guesswork alone.
A key design element is the ability to print without breaking the seal. You can feed filament while the spool remains stored inside, which protects it from moisture during overnight storage or pauses.
This box is an excellent budget-friendly choice for extending filament shelf life. It helps lower common moisture-related issues like stringing and bubbling without the complexity of heating elements.
Hygrometer Integration
The visible humidity reading helps you maintain suitable environments for your filament without extra tools.
Sealed Feeding Design
You can print continuously while keeping the spool protected inside the moisture-proof container at all times.
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4. Comgrow SH01 – Solid Dual Spool Performer
Comgrow SH01 Filament Dryer Box
Two spools capacity standard
40 to 50 Celsius range
Silicone cable sheath outlet
Touch screen display controls
The Comgrow SH01 Filament Dryer Box is designed to keep filaments dry during active printing sessions. With a 4.4 rating, it provides a robust solution for users who print with multiple rolls regularly.
Pros
- Large storage for two spools
- Clear 2-inch LCD screen
- Sealed outlet structure
- Good after-sales technical support
- Effective moisture removal design
Cons
- Temperature limited to 50 Celsius
- Requires correct filament loading direction
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It features an internal heating system that maintains a dry environment for the filament. The 2-inch LCD screen displays temperature and humidity in real time, allowing for easy monitoring of conditions.
The outlet structure uses a silicone cable sheath to ensure a smooth feed while maintaining a seal. When not in use, the sealing hole can be closed to keep consumables dry between sessions.
This dryer works well for common materials like PLA and ABS where lower temperatures are sufficient. It helps avoid entanglement and poor adhesion caused by dampness in the printing wire.
Dual Spool Capacity
The inner size allows storage of two 1kg spools comfortably without overcrowding the drying chamber.
Real-Time Monitoring
Touch buttons and a clear screen make setting temperature and duration straightforward for users of all levels.
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5. SUNLU S2 – Spindle Based Drying Option
SUNLU Filament Dryer S2
Built-in spindle rotation
Customizable up to 99 hours
Translucent lid for checking
Up to 70 Celsius max
The SUNLU Filament Dryer S2 uses a built-in spindle to ensure continuous filament rotation during drying. It has a rating of 4.3 and is effective for reviving old or damp filament before use.
Pros
- Continuous filament spinning for even heat
- Large capacity for various sizes
- User-friendly touch screen
- Revives damp old filament well
- Translucent lid for visibility
Cons
- Mechanical spindle may require alignment
- Larger physical dimensions needed
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The large capacity accommodates various spool sizes including 1.75mm to 3.00mm diameters. Users can customize drying time up to 99 hours and temperature up to 70 degrees Celsius via the touch screen.
The translucent lid allows you to check on the filament without opening the lid, which maintains the internal environment. This design helps ensure even drying across the entire spool.
This model is suitable for users who need a versatile dryer that can handle long drying cycles. It optimizes the printing process by removing excess moisture effectively and consistently.
Spindle Rotation System
Continuous rotation ensures that heat reaches every part of the filament evenly for consistent moisture removal.
Versatile Capacity
The large internal space fits different spool dimensions and allows you to check progress easily with the lid.
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6. Comgrow SH02 – Fast PTC Heating Model
Comgrow SH02 Dryer Box
150W PTC heater fast
9 types one key settings
Up to 70 Celsius max
Intelligent safety protection
The Comgrow SH02 improves on previous models with a 150W PTC heater that heats up faster and more efficiently. It carries a rating of 4.4 and offers intelligent safety features for peace of mind.
Pros
- Faster heating with PTC technology
- One key presets for nine types
- Sealed rings prevent moisture entry
- Alarm if fan stops rotating
- Drying two 1kg spools
Cons
- Maximum temp 70 Celsius limit
- Fan dependency for safety
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It includes one-key temperature settings for nine different filament types such as PLA, PETG, and ABS. This simplifies the drying process by automatically selecting the right time and temperature profiles.
Multiple sealing rings on covers and outlets prevent consumables from getting wet effectively. If the fan stops during use, an alarm sounds to alert you before any damage occurs to the heating module.
This dryer is a solid choice for users who want convenience and safety features. The sealed design keeps filament dry during and after printing for consistent results.
Preset Convenience
Predefined settings for common filament types reduce the need for manual calibration and save setup time.
Safety Mechanisms
Temperature cut-offs and fan monitoring ensure the unit operates safely within safe limits during long runs.
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7. Creality Space Pi – Touch Screen Control
Creality Space Pi Filament Dryer
3.7 inch touch screen
One-key for 12 filaments
Power-off memory function
Up to 70 Celsius max
The Creality Space Pi Filament Dryer features a 3.7 inch touch screen for easy operation and monitoring. It has a rating of 4.4 and supports a wide range of filament types with preset modes.
Pros
- Advanced PTC heating technology
- Large easy touch screen
- Settings remembered after power off
- One-key for twelve types
- 360 degree hot air heating
Cons
- Requires proper outlet sealing
- Limited to 70 Celsius max
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Its unique PTC heater ensures uniform drying compared to standard heating pads. The power-off memory function saves your previous settings after an outage, saving you time on reset.
You can freely adjust temperature from 45 to 70 degrees or use one-key settings for common materials. The 48 hour timer allows filaments to dry fully for better print results.
This dryer is well-suited for users who want a modern interface and reliable heating. It pairs well with high-speed printers for efficient filament preparation.
Modern Interface
The large touch screen makes switching between Celsius and Fahrenheit and tracking conditions intuitive and fast.
Power Off Memory
Settings are saved automatically so you do not need to reconfigure the dryer after a temporary power loss.
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8. Creality Space Pi Plus – Dual Spool Variant
Creality Space Pi Plus
Dual spool capability
Real-time humidity monitor
360 degree hot air
48 hour timer
The Creality Space Pi Plus is a dual-spool version of the popular Space Pi dryer. With a rating of 4.4, it offers real-time humidity monitoring alongside its heating capabilities.
Pros
- Dual spool drying support
- Real-time humidity tracking
- Easy touch screen operation
- Power-off memory function
- Compatible with various diameters
Cons
- Maximum temp 70 Celsius
- Requires power for operation
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It features a 3.7 inch touch screen that supports switching between temperature units. The power-off memory function remembers your settings after a power outage so you do not lose your config.
The dual spool design allows you to dry two rolls at once. Real-time humidity monitoring helps you track conditions to ensure filament stays dry during storage or printing breaks.
This dryer is a good choice for users with multiple printers or high volume needs. The adjustable temperature range works for most common and composite filament types.
Humidity Tracking
Real-time display of humidity levels lets you see when the internal environment is truly dry.
Dual Spool Efficiency
Drying two spools simultaneously saves time and keeps your workflow efficient for multi-print setups.
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9. Creality Space Pi X4L – Large Capacity Option
Creality Space Pi X4L
Four spools capacity max
Dual independent heating chambers
Up to 75 Celsius max
Silicone sealed enclosure
The Creality Space Pi X4L is a high-volume option that holds four standard spools or two large 2kg spools. It holds a rating of 4.5 and features dual independent heating chambers for flexibility.
Pros
- Holds up to four spools
- Dual chambers for different needs
- High temperature engineering support
- Silicone sealed enclosure design
- Real-time display for monitoring
Cons
- Larger footprint in workspace
- Requires more power draw
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With a maximum temperature of 75 degrees Celsius, it supports advanced filaments like PC and ASA. The silicone-sealed enclosure prevents moisture re-absorption effectively during storage or pauses.
The real-time display lets you customize temperatures for different filament types without guesswork. It is designed to help high-volume users manage their filament inventory efficiently.
This model is ideal for studios that need to store and dry multiple types at once. It ensures consistent high-quality prints by maintaining a moisture free environment consistently.
High Volume Storage
The capacity to hold four standard spools makes it ideal for users with many materials in circulation.
Engineering Materials Ready
High temperature capability unlocks advanced plastics that are difficult to dry with lower rated units.
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10. Official Creality Space Pi X4 – Professional Grade
Official Creality Space Pi X4
Dual independent heating chambers
Up to 85 Celsius max
Single or dual chamber modes
Supports four printers via holes
The Official Creality Space Pi X4 is a professional grade dryer with dual 200W PTC heaters. It has a rating of 4.6 and offers independent temperature control for two chambers simultaneously.
Pros
- Dual 200W PTC heaters
- Up to 85 Celsius max temp
- Power saving single or dual modes
- Eight filament holes for output
- Dual independent temperature control
Cons
- Larger footprint in workspace
- Requires higher power outlet
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It reaches up to 85 degrees Celsius for effective drying of engineering filaments like PAHT and PC. The unit supports printing on four printers at once via eight output holes and PTFE tubing.
Power saving modes allow single chamber operation which saves up to 40 percent energy. This makes it eco-friendly and cost-effective for long drying cycles.
This dryer is best for users who need high capacity and high temperature capability. It revolutionizes filament drying by allowing multiple spools and printers to run at once.
High Power Performance
Dual 200W heaters ensure rapid heat up and effective moisture removal even for difficult engineering materials.
Energy Efficient Design
Single chamber mode saves energy when you do not need full capacity keeping running costs lower.
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Buying Guide – How to Choose the Best Filament Dryer Box
Selecting the right dryer involves considering capacity, heating type, and temperature range to match your printing needs and materials.
Capacity and Spool Size
Capacity determines how many spools you can dry at once. Models range from single spool units to those holding four or more. Consider your printing volume and space constraints when choosing size.
For occasional printing a single spool dryer is often sufficient. High volume users will benefit from dual or quad spool units to keep inventory ready.
Heating Technology
Heating technology varies from simple heating pads to PTC heaters. PTC heaters warm up faster and distribute heat more evenly. This prevents hot spots that could damage filament.
Look for fans that circulate air for 360 degree heating. Uniform heat ensures that the whole spool dries evenly without weak points.
Temperature Range
Different filaments require different drying temperatures. Standard materials like PLA need lower heat while engineering plastics need higher ranges. Ensure the unit supports the max temp your materials need.
A range up to 70 to 85 degrees is ideal for versatility. This allows you to dry standard and tough materials without buying multiple units.
Control Interface
Interfaces range from simple buttons to touch screens. Touch screens allow precise setting adjustments and real-time monitoring of humidity. Simpler buttons may be easier to use for beginners.
Look for presets if you often switch materials. One-key settings reduce setup time and errors when drying different types regularly.
Sealing and Storage
Sealing prevents moisture re-absorption after drying. Good units use silicone rings and sealed outlets. This allows you to store spools inside the dryer between prints.
Check for illuminated windows so you can monitor spools without opening the lid. This keeps humidity stable while you check on drying progress.
Safety Features
Safety features protect both the unit and your filament. Look for auto shutoff if temps exceed safe limits or if fans stop working. This prevents overheating and potential damage.
Fan alarms are common in advanced models. They alert you immediately if airflow stops ensuring consistent drying conditions throughout the cycle.
Timer Functions
Timers let you set specific drying durations. Some units go up to 48 or 99 hours. This is useful for fully reviving old damp filament before use.
Check for power-off memory. This feature saves your settings during a power outage so you do not lose your progress.
Output and Feed
The outlet design affects how smoothly filament feeds. Look for silicone sheaths or Teflon tubes that protect the filament while it enters your printer. Good design prevents tangling at the outlet.
Some models support printing while stored. This allows you to keep the spool sealed inside while printing and prevents exposure to humid air.
How to Use and Care for Your Filament Dryer Box
Before first use, ensure the unit is placed on a flat and stable surface. Check that the outlet hole is properly sealed when not feeding filament to maintain internal humidity levels.
Load the spool carefully ensuring the direction matches the recommended counterclockwise feed. Adjust the temperature and time based on the filament type using the touch screen or buttons.
After the cycle finishes, allow the unit to cool before opening. For storage, keep the sealing rings clean and check the desiccant if your model supports it to maintain moisture protection.
Frequently Asked Questions
How do I know if my filament is dry enough?
Most units have a humidity monitor that shows when levels drop below a threshold. You can also observe prints for signs like reduced stringing or bubbling. Proper drying typically takes several hours depending on moisture level.
Can I use a filament dryer with different diameter filaments?
Most modern dryers support standard 1.75mm and 2.85mm sizes. Some also support 3.00mm. Check the product specs for maximum capacity and compatibility with specific filament types before purchasing.
Do filament dryers work with all brands?
Yes, most dryers are compatible with any brand as long as the diameter is standard. Focus on the material type like PLA or PETG for temperature settings rather than the brand name itself.
How long does it take to dry wet filament?
Drying times vary based on moisture content and temperature. Typical ranges are 4 to 12 hours for active drying. Old filament may require longer cycles to fully restore print quality.
Can I print while the filament is inside?
Many models allow you to feed filament while the spool stays inside the sealed enclosure. This prevents re-absorption of moisture during printing pauses and helps maintain print quality consistently.
What is the maximum temperature I should use?
Maximum temperatures range from 50 to 85 degrees depending on the model. Always consult your filament specs. Using too high heat can deform certain materials so match settings carefully.
How do I maintain the dryer over time?
Keep the interior clean and check seals periodically. Ensure the fan is free of dust. If it uses desiccant, replace it when saturated to maintain effective moisture protection levels.
Are there any safety concerns with these units?
Most units include thermal cut-offs and fan alarms for safety. Place them on heat resistant surfaces away from flammables. Avoid leaving them unattended for extended periods if not designed for it.
Final Thoughts on Choosing the Best Filament Dryer Box
We reviewed ten filament dryer boxes ranging from budget units to premium multi-spool models. Each offers unique features to keep your prints dry and consistent for better quality output.
Prioritize capacity and temperature range based on your materials. If you use engineering plastics look for higher max temps. If you print PLA and PETG standard ranges are sufficient.
Remember to check current availability and features before buying. Models may update over time so verify specs match your needs for the best results in your printing projects.