SUNLU Filament Dryer Box 2026 New Upgrade S1 Plus
4.3Editor score
Fast drying with fan
Visual LCD display
High capacity up to 210mm
In this guide
Filament dryer boxes are essential tools for 3D printing enthusiasts who need to maintain optimal material quality. Moisture absorption can ruin prints, causing stringing and weak layers. A good dryer box solves these issues by actively removing humidity from spools.
We compared ten leading models based on heating technology, capacity, user interface, and sealing effectiveness. Our analysis focuses on real-world performance, ease of use, and versatility across different filament types like PLA, PETG, and engineering materials.
Each pick highlights unique strengths for various printing needs. Note that product availability and pricing may fluctuate over time. Always verify current specifications before purchasing to ensure compatibility with your specific 3D printing workflow.
Top 3 Picks for Best Filament Dryer Box
Creality Filament Dryer Box 4 Spools Space Pi X4
4.6Editor score
Dual independent heating chambers
Holds up to 4 spools
Advanced touch UI
Official Creality Filament Dryer Space Pi X4 DB-05
4.6Editor score
Dual independent temperature control
Energy-efficient modes
Supports engineering filaments
Top 10 Best Filament Dryer Box in 2026 Compared
The following table provides a side-by-side comparison of all ten products. It highlights key specifications to help you quickly identify which dryer box fits your specific printing requirements and budget constraints.
ProductsSpecificationsEditor scorePrice
Best Budget
SUNLU S1 Plus
Capacity 210mm height
Range 35-55°C
Fan-assisted drying
LCD screen display
4.3Editor score
Editor's Choice
Creality Space Pi X4
Capacity 4 spools
Dual 200W heaters
Max 85°C temperature
Touch UI interface
4.6Editor score
Best Premium
Comgrow SH01
Capacity 2 spools
Range 40-50°C
Silicone cable sheath
Auto shut-off
4.4Editor score
Polymaker Polydryer
Storage only design
Includes hygrometer
Sealed enclosure
1kg spool support
4.4Editor score
SUNLU S2
Capacity 265x274mm
Range 35-70°C
Spindle for even drying
Translucent lid
4.3Editor score
Comgrow SH02
Capacity 2 spools
Range 40-70°C
One-key presets
Safety protections
4.4Editor score
Creality Space PI 2026
PTC 360 heating
Range 45-70°C
One-key 12 filaments
Power-off memory
4.4Editor score
Creality Space PI Plus
Dual spool support
PTC 360 heating
Real-time humidity
12 filament presets
4.4Editor score
Creality Space Pi X4L
Capacity 4 spools
Dual heating chambers
Max 75°C temperature
Illuminated window
4.5Editor score
Creality Space Pi X4 DB-05
Capacity 4 spools
Dual chamber control
Max 85°C temperature
Energy saving modes
4.6Editor score
1. SUNLU S1 Plus – Best Budget Filament Dryer Box
SUNLU Filament Dryer Box 2026 New Upgrade S1 Plus
Fan-assisted drying
Up to 210mm height
LCD screen display
Compatible 1.75mm 3mm
The SUNLU Filament Dryer Box 2026 New Upgrade S1 Plus offers a cost-effective solution for keeping spools dry. With a 4.3 rating, it delivers reliable performance for everyday printing tasks without breaking the bank.
Pros
- Affordable price point
- Fan speeds up drying
- Easy temperature controls
- Clear visual display
- Fits most spools
Cons
- Lower max temperature
- Basic UI features
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Its standout feature is the integrated fan design which significantly speeds up the discharge of excess water. The visual display shows temperature, time, and humidity clearly. Users can adjust settings easily via the left and right buttons.
The temperature range is limited to 55°C maximum, which excludes high-temp engineering filaments. However, for common materials like PLA and PETG, this range is sufficient. The seal is good but not industrial grade.
This dryer is ideal for beginners or casual users who need basic protection against moisture. It fits standard 1kg spools easily. We recommend it for those prioritizing affordability over advanced engineering support.
Fan Assisted Drying
The internal fan circulates air to remove moisture faster than passive heating units.
Clear Visual Feedback
The LCD screen lets you monitor conditions without opening the box during printing.
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2. Creality Space Pi X4 – Best Overall Filament Dryer Box
Creality Filament Dryer Box 4 Spools Space Pi X4
Dual 200W heating chambers
Max 85°C temperature
Holds 4 spools
Touch UI interface
The Creality Space Pi X4 is a top-tier dryer designed for high-volume users. It holds four standard spools and features dual heating chambers. Its 4.6 rating reflects strong performance and user satisfaction.
Pros
- Holds up to 4 spools
- Dual chambers allow different temps
- High 85°C max temperature
- Advanced touch UI
- Sealed storage design
Cons
- Higher price point
- Large footprint
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Dual independent 200W heating chambers allow for faster drying and even support different temperatures simultaneously. The touch UI is industry-first for this segment. Silicone sealing prevents moisture re-absorption effectively.
The price is high compared to basic boxes, but the capacity justifies it. It is large, requiring significant desk space. Power consumption is higher due to dual 200W heaters.
Buy this if you manage multiple printers or use engineering filaments needing high heat. It ensures print-ready filament in hours. It is the ultimate dryer for serious makers who need efficiency.
Dual Chamber Efficiency
Two independent heaters remove moisture 30% faster than single-chamber dryers.
Smart Touch Interface
Customize temps for specific filament types with real-time display feedback.
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3. Creality Space Pi X4 DB-05 – Best Premium Filament Dryer Box
Official Creality Filament Dryer Space Pi X4 DB-05
Dual 200W PTC heaters
Max 85°C temperature
Energy saving modes
Supports engineering filaments
The Official Creality Filament Dryer Space Pi X4 DB-05 offers dual independent temperature control. It is built for efficiency and engineering-grade materials. Its 4.6 rating matches the performance expectations.
Pros
- Dual independent temp control
- Energy saving modes
- High 85°C capability
- Handles engineering filaments
- Sealed storage
Cons
- Highest price in category
- Requires heat resistant trays
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It supports simultaneous drying of two filament types at different temperatures. The dual heaters provide consistent heat for difficult materials. Power-saving modes allow single-chamber operation for reduced costs.
You must use compatible plastic trays to ensure safety. The price is premium compared to standard dryers. It occupies significant workspace due to its four-spool capacity.
This dryer is best for professionals who need maximum capacity and temperature flexibility. It handles PC and PAHT reliably. Choose this if engineering precision and volume are your priorities.
Independent Chamber Control
Each chamber has its own heater for unique temperature settings.
Power Saving Options
Single-chamber mode saves up to 40% energy for lighter loads.
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4. Comgrow SH01 – Reliable Mid-Range Filament Dryer Box
Comgrow 3D Printer Filament Dryer Box SH01
Capacity 2 spools
Range 40-50°C
Silicone cable sheath
Auto shut-off
The Comgrow SH01 is a reliable dryer focused on keeping materials dry during printing. It holds two spools effectively and has a 4.4 rating. It is built for standard filament types like PLA and ABS.
Pros
- Large storage volume
- Simple touch screen
- Good sealing performance
- Safe auto shut-off
- Compatible with 2mm
Cons
- Lower max 50°C limit
- Manual setup required
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The internal heating provides a dry environment. A 2-inch LCD screen makes monitoring easy. The silicone cable sheath ensures smooth feeding. Sealing is robust when closed properly.
Temperature settings are limited to 50°C max which might not dry high temp plastics well. You must manually set the time. Auto shut-off protects the unit after idle time.
Buy this if you print PLA or PETG regularly. It is a solid middle ground between budget and advanced dryers. We recommend it for users who need consistent storage protection.
Internal Heating Design
Keeps filament dry during printing to prevent moisture re-absorption.
Sealing Mechanism
Snap button structure ensures a tight seal to maintain humidity levels.
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5. Polymaker Polydryer – Simple Passive Storage Filament Dryer Box
Polymaker Polydryer Filament Storage Box
Storage only design
Includes hygrometer
Sealed enclosure
1kg spool support
The Polymaker Polydryer is a passive storage solution. It does not heat but offers a sealed environment. With a 4.4 rating, it is valued for its simplicity and hygrometer inclusion.
Pros
- Simple sealed design
- Built-in hygrometer
- Allows printing inside
- Compatible with many types
- Space efficient
Cons
- No active heating
- Requires desiccant replacement
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The airtight enclosure reduces exposure to humid air. You can feed filament without breaking the seal. The hygrometer helps monitor conditions. It supports 1.75mm up to 3.00mm diameters.
Since it lacks heating, it cannot actively dry wet filament. You must rely on desiccants which require replacement. It is not suitable for long drying sessions of wet spools.
Choose this for storing filament between jobs or in dry climates. It protects against minor humidity spikes. It is best for users who prefer low-maintenance passive protection.
Sealed Protection
Reduces exposure to humid air to prevent common moisture issues.
Print While Stored
Designed to support filament feeding while spools remain inside.
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6. SUNLU S2 – High Capacity Filament Dryer Box
SUNLU Filament Dryer S2
Capacity 265x274mm
Range 35-70°C
Spindle for even drying
Translucent lid
The SUNLU Filament Dryer S2 is designed for larger spools and high capacity. It holds standard rolls up to 1kg. Its 4.3 rating indicates it is a straightforward tool for drying tasks.
Pros
- Large spool capacity
- Even drying spindle
- Touch screen controls
- Translucent lid design
- Simple effective UI
Cons
- Larger than average
- Basic feature set
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A built-in spindle ensures continuous rotation for even drying. The large touch screen makes setup easy. The translucent lid lets you check on the spool. Temperature range extends to 70°C.
The capacity is good for storage, but it takes up space. The interface is simple. It lacks advanced preset options. However, it is effective for reviving damp filaments.
This dryer is suitable for users who need to store and dry large batches. It helps optimize printing processes. We recommend it for those prioritizing spool compatibility.
Continuous Rotation
Built-in spindle ensures filament spins continuously for even drying.
Easy Visibility
Translucent lid allows visual checks without opening the unit.
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7. Comgrow SH02 – Fast Heating Filament Dryer Box
Comgrow Filament Dryer Box SH02
Capacity 2 spools
Range 40-70°C
One-key presets
Safety protections
The Comgrow SH02 features one-key temperature settings for different filaments. It uses a 150W PTC heater for speed. Its 4.4 rating shows it performs well for typical 3D printing needs.
Pros
- One-key filament settings
- 150W PTC heater
- Multiple safety protections
- Sealed rings design
- Touch screen
Cons
- Limited to 2 spools
- Fan noise possible
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The touch screen is easy to use. Safety protections cut heating if limits are exceeded. Sealing rings prevent moisture leakage. It reaches 50°C in just seven minutes.
It has a maximum time of 98 hours. If the fan stops, an alarm sounds. This requires monitoring. The 2-spool capacity limits bulk storage.
Buy this if you want automated settings and fast heat-up. It handles common materials like ABS and ASA. We recommend it for users who value convenience.
One-Key Presets
Select filament type and drying starts immediately with correct parameters.
Safety Protection
Temperature and fan sensors prevent overheating or module damage.
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8. Creality Space PI 2026 – Advanced PTC Filament Dryer Box
Creality Space PI 2026 New Creality Space PI Filament Dryer
PTC 360 heating
Max 70°C temperature
One-key 12 filaments
Power-off memory
The Creality Space PI 2026 model uses PTC 360° hot-air heating. It offers presets for 12 filament types. Its 4.4 rating reflects user satisfaction with its upgraded features.
Pros
- PTC 360° heating
- 12 filament presets
- Power-off memory
- 3.7-inch touch screen
- Celsius to Fahrenheit
Cons
- Heating not uniform
- Complex setup
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The touch screen supports switching between temperature scales. Power-off memory saves your settings. It allows you to customize temperature freely. The fan ensures uniform air circulation.
The 48-hour timer provides long drying cycles. However, PTC heating may require calibration for some filaments. The interface is intuitive but has many settings to learn.
This dryer is good for users needing versatility. It saves time with presets. We recommend it for those who print composite materials often.
Uniform Heating
Built-in fan circulates hot air 360° for uniform drying.
Memory Function
Remembers previous settings after power outage for fast restart.
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9. Creality Space PI Plus – Dual-Spool Filament Dryer Box
Creality Space PI Plus 2026
Dual spool support
PTC 360 heating
Real-time humidity
12 filament presets
The Creality Space PI Plus supports dual spools for concurrent drying. It features a real-time humidity monitor. Its 4.4 rating shows it is well built for typical 3D printing needs.
Pros
- Dual spool support
- Real-time humidity monitor
- PTC heating tech
- Adjustable temperature
- Presets included
Cons
- Limited to 2 spools
- Humidity sensor calibration
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The humidity monitor helps track storage conditions. Adjustable temperature allows fine-tuning. It supports high-performance composites. The presets simplify workflow.
The humidity monitor needs occasional calibration. The spool count is limited. However, it offers better control than single-spool units.
Buy this if you need better monitoring and capacity. It is versatile for various materials. We recommend it for users who track humidity closely.
Real-Time Monitoring
Monitor spools via real-time humidity data without breaking control.
Dual Capacity
Supports drying two spools simultaneously for efficiency.
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10. Creality Space Pi X4L – Large Capacity Filament Dryer Box
Creality Space Pi X4L
Capacity 4 spools
Dual heating chambers
Max 75°C temperature
Illuminated window
The Creality Space Pi X4L holds four spools and uses dual heating chambers. It reaches up to 75°C. Its 4.5 rating indicates it is a reliable tool for serious 3D printing needs.
Pros
- Holds 4 spools
- Dual heating chambers
- Illuminated window
- Rapid drying
- High temperature
Cons
- Large footprint
- High power use
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The illuminated window lets you monitor spools. Dual chambers provide better efficiency. It supports engineering filaments. The drying process is rapid.
Power consumption is high. The unit takes significant space. However, the speed and capacity make up for it.
This dryer is ideal for users with large inventories. It reduces drying time significantly. We recommend it for workshops with high throughput.
Dual Chamber Speed
Dual independent chambers remove moisture 30% faster than single ones.
Spool Visibility
Monitor spools via illuminated window without breaking humidity control.
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Buying Guide – How to Choose the Best Filament Dryer Box
Selecting the right filament dryer box depends on your specific materials, printing volume, and budget. This guide helps you prioritize the features that matter most.
Capacity and Spool Size
Capacity determines how many spools you can dry at once. Basic models hold one or two standard 1kg spools. High-volume options like the Space Pi X4 hold four. Consider your current inventory and storage space before choosing. A model that holds two spools allows for simultaneous drying of different materials.
Choose a capacity that matches your workload. Too small causes bottlenecks; too large wastes desk space.
Temperature Range
Different materials require different drying temperatures. PLA needs low heat while PETG and Nylon need higher. Engineering filaments require up to 85°C. Check the maximum temperature to ensure it covers your needs. Avoid units limited to 50°C if you use tough materials.
Verify the max temperature matches your filament requirements. This ensures effective drying and better print quality.
Heating Technology
PTC heaters provide uniform and safe heating. Some units use passive heat or pads that may heat unevenly. Fan-assisted units circulate air faster for quicker results. Look for 360° air circulation to prevent hot spots. This technology extends filament life by reducing uneven exposure.
Prioritize units with active circulation. Consistent heat ensures the entire spool dries evenly.
Control Interface
The interface should be intuitive to use. Touch screens make adjustments quick. Physical buttons are durable but can be slower to set. Look for preset modes for common materials. This reduces setup errors and saves time during busy sessions.
Choose an interface that suits your workflow. Presets help avoid complex manual calculations.
Safety Features
Safety mechanisms prevent overheating and fires. Units with thermal cutoffs shut off if limits are exceeded. Fan sensors warn you if the cooling system fails. Overheating can damage filaments or the box itself. Safety features add peace of mind.
Ensure the unit has thermal protection. This prevents hazards when running long drying cycles.
Sealing and Storage
Sealing prevents moisture from re-entering the box. Silicone rings and tight lids are essential. Some boxes allow printing while sealed so humidity stays low. Check for sealed outlets for the filament. This feature doubles as a storage container.
Good sealing preserves filament dryness. Look for airtight designs to maintain protection.
User Feedback
Reading reviews helps identify common issues. High ratings suggest reliability and durability. Users often report on build quality or ease of use. Avoid models with consistent complaints. Feedback highlights real-world performance beyond specs.
Check reviews for long-term reliability. Consistent praise suggests a solid investment.
Budget Considerations
Basic models cost less but offer fewer features. Premium models have dual chambers and higher capacities. Balance cost against your printing needs. High capacity is only worth it if you print often. A budget unit works fine for hobbyists.
Invest more if you print frequently. Otherwise, a basic unit suffices for occasional use.
How to Use and Care for Your Filament Dryer Box
Place spools inside carefully ensuring the filament feeds smoothly through the outlet. Avoid twisting the filament to prevent jams. If using the unit while printing ensure the exit tube is connected to the printer extruder correctly. This setup allows continuous drying during the print job.
Set the temperature based on your filament type. Refer to manufacturer guidelines for optimal heat. Avoid exceeding the maximum temperature to prevent melting. Use the preset buttons if available to save time. Regular monitoring ensures safe operation.
Clean the unit periodically to remove dust. Check the fan and vents for blockages. Ensure sealing rings are intact for best performance. Replace them if they look worn. Proper care extends the lifespan of the dryer.
Frequently Asked Questions
How long does it take to dry filament?
Drying time depends on how wet the filament is. Most units require 4 to 12 hours for effective drying. Some models offer preset times for common materials. Check the spool before drying to estimate duration.
Can I use a dryer box for storage?
Yes many boxes offer dual functionality. You can store dry filament and maintain humidity. Sealed designs prevent moisture from returning. This saves space by combining drying and storage.
What temperature do I need for PLA?
PLA requires low heat typically between 40 and 50 degrees Celsius. Higher temperatures can warp or melt PLA spools. Always start with the lowest effective setting to preserve material integrity.
How do I prevent the filament from getting wet again?
Keep the box sealed when not in use. Do not leave the door open after drying. Use desiccant packs for extra protection during storage. A tight seal is crucial for long-term dryness.
Are these boxes safe to run overnight?
Most models have safety features like auto shut-off. However continuous monitoring is recommended for extended use. Check the manual for specific overnight guidelines. Safety sensors reduce risk significantly.
Can I dry multiple filament types at once?
Dual chamber models allow different temperatures simultaneously. Single chamber units dry one type at a time. Ensure compatible materials are used together to avoid cross-contamination.
Final Thoughts on Choosing the Best Filament Dryer Box
We reviewed ten top dryer boxes ranging from budget to premium. The SUNLU S1 Plus offers great value while the Creality Space Pi X4 provides high capacity. Your choice depends on print volume and material needs.
Prioritize temperature range and capacity based on your projects. Safety features and sealing quality are crucial for long-term performance. Consider if you need passive storage or active drying capabilities.
Remember to check current availability and verify specs before buying. Prices may vary based on stock and promotions. Choose a unit that fits your workflow today to ensure smooth printing tomorrow.