SUNLU Filament Dryer Box 2026
4.3Editor score
Fast drying with fan design
Visual LCD display screen
Compatible with multiple diameters
In this guide
Moisture in 3D printing filament leads to poor print quality, including stringing, bubbles, and weak layer adhesion. A reliable filament dryer box solves this by actively removing humidity before and during printing sessions, ensuring consistent results across various material types.
We evaluated ten leading filament dryer boxes based on heating technology, capacity, user interface, and sealing efficiency. Our analysis focuses on models that offer precise temperature control, rapid drying cycles, and robust protection against ambient humidity in workshop environments.
Each pick highlights unique strengths such as multi-spool support, dual-chamber heating, or portable design. While prices fluctuate due to demand and promotions, these models represent the best value and performance available in the current market for maintaining optimal filament conditions.
Top 3 Picks for Best Filament Dryer Box
Creality Filament Dryer Box 4 Spools
4.6Editor score
Dual independent heating chambers
Holds four 1kg spools
Precise temperature control
Official Creality Filament Dryer
4.6Editor score
Dual independent chambers
Up to 85 degrees C
Energy saving modes
Top 10 Best Filament Dryer Box in 2026 Compared
The following comparison table breaks down key specifications for each model to help you quickly identify the right fit for your workflow.
ProductsSpecificationsEditor scorePrice
Best Budget
SUNLU Filament Dryer Box 2026
Max Temp 55 Celsius
Single Spool Capacity
LCD Temperature Display
Fan Assisted Drying
4.3Editor score
Editor's Choice
Creality Filament Dryer Box 4 Spools
Max Temp 85 Celsius
Four Spool Capacity
Dual Heating Chambers
Touch UI Control
4.6Editor score
Best Premium
Comgrow 3D Printer Filament Dryer Box
Max Temp 50 Celsius
Two Spool Capacity
LCD Display Screen
Silicone Sealing
4.4Editor score
Polymaker Polydryer Filament Storage Box
No Active Heating
Single Spool Capacity
Built-in Hygrometer
Airtight Sealing
4.4Editor score
SUNLU Filament Dryer S2
Max Temp 70 Celsius
Large Capacity
Touch Screen Control
Built-in Spindle
4.3Editor score
Comgrow Filament Dryer Box SH02
Max Temp 70 Celsius
Two Spool Capacity
One Key Presets
PTC Fast Heater
4.4Editor score
2026 New Creality Space PI
Max Temp 70 Celsius
Single Spool Capacity
360 Hot Air Heating
48 Hour Timer
4.4Editor score
2026 New Creality Space PI Plus
Max Temp 70 Celsius
Dual Spool Capacity
360 Hot Air Heating
Real Time Humidity
4.4Editor score
Creality Filament Dryer Box X4L
Max Temp 85 Celsius
Four Spool Capacity
Dual Independent Chambers
Silicone Sealed
4.5Editor score
Official Creality Filament Dryer
Max Temp 85 Celsius
Four Spool Capacity
Dual Heating Chambers
Energy Saving Mode
4.6Editor score
1. Creality Filament Dryer Box 4 Spools – Best Overall
Creality Filament Dryer Box 4 Spools
4 Spool Storage Capacity
85°C Max Temperature
Dual Heating Chambers
200W Per Chamber
The Creality Space Pi X4 stands out as the top choice for high-volume users needing consistent dry results. With a 4.6 rating, it combines large capacity with professional-grade heating technology that handles even moisture-sensitive materials effectively.
Pros
- Holds large volume for batch drying
- Dual chambers allow independent temps
- High max temp for engineering filaments
- Effective moisture sealing
- Clear illuminated window
Cons
- Higher price point
- Requires significant desk space
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Its dual independent 200W heating chambers allow you to dry two different filament types simultaneously at different temperatures. The 85°C maximum ensures that materials like PC and Nylon are fully prepared, while the silicone-sealed enclosure maintains dryness during pauses.
While it demands a larger footprint than single-spool units, the time savings from drying multiple spools at once justifies the investment. The touch UI is intuitive, allowing quick adjustments without needing complex menus.
Ideal for workshops running multiple printers or printing long jobs with different materials. If you prioritize speed and capacity over compactness, this model offers unmatched value for serious makers.
Dual Chamber Independence
You can set one chamber to 60°C for PETG and another to 80°C for ABS, maximizing efficiency without cross-contamination.
Sealing Technology
Silicone seals on the lid and outlet ports prevent moisture re-absorption, ensuring filament stays dry until the next print session.
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2. SUNLU Filament Dryer Box 2026 – Best Budget
SUNLU Filament Dryer Box 2026
Fan Assisted Drying
35°C to 55°C Range
LCD Display
1.75mm Compatible
The SUNLU S1 Plus offers an entry-level solution for those looking to prevent moisture issues without breaking the bank. With a 4.3 rating, it proves effective for standard PLA and PETG filaments used in daily prints.
Pros
- Affordable price point
- Fan speeds up drying
- Clear temperature and time display
- Compatible with common diameters
- Simple button controls
Cons
- Lower max temperature
- Single spool capacity
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Its upgraded fan design helps discharge excess water faster than passive heaters, while the 2-inch LCD screen lets you monitor temperature and humidity easily. The temperature range covers most common plastics, making it versatile for general use.
While it lacks the high heat needed for engineering plastics, it is perfectly adequate for hobbyists. The simple interface means you can start drying with just a few button presses, reducing setup time.
Perfect for beginners or those printing mostly with standard materials. If budget is a primary concern but you still need active drying, this box provides reliable performance at a fraction of the cost.
Fast Drying Fan
The internal fan circulates air actively, reducing drying time compared to static heating elements found in older models.
Visual Monitoring
The LCD displays real-time data, letting you confirm settings without guessing or opening the lid prematurely.
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3. Comgrow 3D Printer Filament Dryer Box – Best for Dual Spools
Comgrow 3D Printer Filament Dryer Box
Two Spool Storage
Max Temp 50°C
Silicone Sealing
LCD Screen
Comgrow SH01 balances capacity and simplicity, ideal for users needing to dry two rolls simultaneously. Its 4.4 rating reflects reliable performance in keeping filament dry during print pauses without requiring complex controls.
Pros
- Stores two spools at once
- Good sealing mechanism
- Real-time humidity monitoring
- Easy touch buttons
- Safe cable sheath
Cons
- Max temp limited to 50°C
- Auto-shutdown feature
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The internal heater maintains a dry environment up to 50°C, which suits PLA and PETG well. Sealing performance is strong due to silicone rings on the covers, preventing moisture from entering when not actively drying.
While it cannot handle high-temperature engineering filaments, it is a solid choice for standard printing. The auto-shutdown prevents overheating if no operation is detected, adding a layer of safety to your workspace.
Recommended for small studios or dual-printer setups where mid-capacity is needed. If you often run out of dry filament between jobs, this model ensures you always have spools ready.
Dual Spool Capacity
Accommodating two 1kg spools allows you to prepare enough material for larger jobs or future use.
Silicone Sealing
The cable sheath and outlet plugs ensure tight closure, keeping humidity outside the storage volume effectively.
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4. Polymaker Polydryer Filament Storage Box – Best Passive Storage
Polymaker Polydryer Filament Storage Box
Passive Storage Only
Single Spool
Hygrometer Included
No Power Required
Polymaker Polydryer is an excellent passive option for users who prefer simple storage over active drying. With a 4.4 rating, it focuses on sealing quality, ensuring that once dry, filament stays protected in humid environments.
Pros
- No electricity needed
- Built-in hygrometer
- Airtight design
- Easy filament feeding
- Compact workspace footprint
Cons
- No active heating
- Requires desiccant refills
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The built-in hygrometer lets you track humidity levels visually, ensuring you know when to replace desiccants. Its design allows feeding without breaking the seal, which maintains consistent conditions during print pauses.
While it cannot dry wet filament on its own, it is perfect for maintenance. This makes it a great companion for active dryers, extending the life of filament after it has been processed.
Best for makers who store filament for long periods or have limited outlet access. If you need a reliable way to keep dry filament dry, this box delivers without the complexity of heaters.
Hygrometer Monitoring
Tracking humidity helps you anticipate moisture spikes, allowing timely desiccant replacement before issues arise.
Seal Preservation
Printing without breaking the seal keeps the internal environment stable, ensuring consistent extrusion quality.
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5. SUNLU Filament Dryer S2 – Best for Reviving Old Filament
SUNLU Filament Dryer S2
High Capacity
35°C to 70°C
Touch Screen
Built-in Spindle
The SUNLU S2 is designed to bring damp, old filament back to life with effective heating up to 70°C. Its 4.3 rating highlights reliable performance in revitalizing materials that might otherwise go to waste.
Pros
- Large capacity storage
- High 70°C max temp
- User-friendly touch screen
- Spindle ensures even drying
- Translucent lid
Cons
- No humidity display
- Single spool focus
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The built-in spindle spins the filament continuously, ensuring that heat reaches every section uniformly. This feature is crucial for thorough drying, reducing the risk of internal moisture pockets that cause defects.
While it lacks humidity monitoring, the temperature control is precise enough for most needs. The translucent lid lets you check progress without opening the box, maintaining the integrity of the drying cycle.
Ideal for users with aging filament supplies or high humidity basements. If saving old spools is a priority, this model offers the tools needed to restore them to printable condition efficiently.
Continuous Spinning
The spindle ensures uniform heat distribution, preventing hot spots and ensuring consistent drying across the entire spool.
High Temperature Range
With support up to 70°C, it handles tougher materials like ABS and TPU better than low-temp dryers.
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6. Comgrow Filament Dryer Box SH02 – Best for Multi-Filament Types
Comgrow Filament Dryer Box SH02
Two Spool Capacity
70°C Max Temp
9 Material Presets
150W PTC Heater
The Comgrow SH02 simplifies drying by offering preset temperatures for nine different filament types, making it easy to use for diverse libraries. With a 4.4 rating, it balances safety and efficiency effectively for users needing quick setup.
Pros
- One key presets for 9 types
- Fast PTC heating
- Safety protection alarms
- Efficient air circulation
- Multiple sealing rings
Cons
- Limited to 70°C
- Smaller than X4 models
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The 150W PTC heater heats up quickly, reaching 50°C in just seven minutes. Intelligent safety features cut power if temperatures exceed safe limits, ensuring the device remains safe during unattended operation.
While it shares capacity with other dual-spool units, its focus on ease-of-use stands out. The sealed design prevents moisture ingress during pauses, keeping spools ready for the next job immediately.
Perfect for mixed-filament users who want one-touch operation. If you juggle PLA, ABS, and PETG regularly, this model saves time by automating the drying process for you.
One-Key Presets
Just press a button for your filament type, and the box sets the correct temperature and time automatically.
Safety Alarms
An audible alarm warns if the fan stops, preventing overheating and protecting the PTC module from damage.
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7. 2026 New Creality Space PI – Best for Power Outage Memory
2026 New Creality Space PI
70°C Max Temp
360° Air Flow
Power-off Memory
48 Hour Timer
The Creality Space PI is built for reliability, featuring a power-off memory function that resumes drying after a power outage. With a 4.4 rating, it ensures long drying cycles aren't interrupted by electrical issues.
Pros
- Resumes after power outage
- 360° uniform heating
- Supports composite filaments
- Large touch screen
- Eco-friendly heater
Cons
- Single spool design
- Shorter max time
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Its 360° hot air heating uses a fan to distribute heat evenly, preventing hot spots common with pad heaters. It supports up to 12 filament types, including high-performance composites like PA-CF, making it versatile.
While it only holds one spool, the focus on efficiency is clear. The 48-hour timer gives ample time for drying even heavily soaked materials without manual intervention or worry.
Best for users in areas with unstable power or long drying needs. If you need assurance that your drying process will complete safely, this model provides that peace of mind.
Power Outage Memory
Your settings are saved, so a brief outage doesn't force you to restart the drying cycle from scratch.
Composite Support
Presets for reinforced filaments ensure you get the right temperature for difficult materials like PA-CF.
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8. 2026 New Creality Space PI Plus – Best Real-Time Humidity
2026 New Creality Space PI Plus
Two Spool Capacity
Real-Time Humidity Monitor
360° Heating
12 Presets
The Space PI Plus adds real-time humidity monitoring, allowing you to verify drying progress without opening the box. With a 4.4 rating, it combines dual spool capacity with precise data to optimize your workflow.
Pros
- Tracks humidity live
- Dual spool support
- Uniform 360° heating
- Adjustable temps
- Large touch screen
Cons
- Mid-range price
- Single zone control
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Its 360° hot air ensures even heating, while the touch screen makes adjustments simple. You can choose from 12 filament presets or customize temperatures, ensuring flexibility for any project type.
While it doesn't offer dual independent chambers, the sealed design protects spools effectively. This makes it a strong middle-ground option for those needing more than single-spool capacity but less than full multi-chamber systems.
Ideal for workshops tracking humidity levels closely. If you want data-driven drying, this model provides the tools to monitor conditions and adjust your process with confidence.
Live Humidity Data
Watch humidity drop in real time, giving you confidence that your filament is dry before starting prints.
Dual Spool Utility
Accommodating two spools doubles your throughput, perfect for setups running two printers side by side.
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9. Creality Filament Dryer Box X4L – Best High Capacity
Creality Filament Dryer Box X4L
Four Spool Capacity
85°C Max Temp
Dual Independent Chambers
Fast Drying
The X4L is a powerhouse for large-scale printing, offering four spool slots and dual independent chambers. With a 4.5 rating, it delivers the speed and capacity needed for industrial-grade workflows.
Pros
- Holds large volumes
- Dual chamber efficiency
- High temperature capability
- Effective sealing
- Illuminated window
Cons
- High power usage
- Requires space
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Its dual 200W chambers remove moisture 30% faster than single designs, making it easy to prepare materials quickly. The 85°C max allows for drying engineering filaments like PC and PAHT with precision.
While it uses significant power, the time savings are substantial. The silicone-sealed enclosure ensures that once dried, filament stays dry regardless of ambient conditions.
Best for production environments with multiple printers. If you need to keep up with high demand, this model ensures you always have dry material ready to print.
Dual Chamber Efficiency
Run two different filament types at once, cutting drying time in half for mixed-material production.
Engineering Support
High heat capacity allows you to dry tough materials that standard dryers cannot handle effectively.
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10. Official Creality Filament Dryer – Best Energy Efficiency
Official Creality Filament Dryer
Four Spool Capacity
Energy Saving Mode
Dual Independent Chambers
Up to 85°C
The Official Creality Filament Dryer balances power with energy efficiency, allowing you to run in single-chamber mode to save power. With a 4.6 rating, it is engineered for cost-effective operation in larger studios.
Pros
- Flexible single or dual modes
- Up to 40% energy savings
- Independent chamber temps
- Fast heat up
- High quality build
Cons
- Premium price
- Requires RFID trays
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Its dual independent heaters allow precise control for different materials. The ability to save up to 40% energy in single mode makes it eco-friendly without sacrificing performance when you need full capacity.
While it recommends official trays for best results, it remains versatile for most users. The high temperature range ensures even the most demanding filaments are processed correctly every time.
Ideal for high-volume operations prioritizing efficiency. If you want professional results with lower operating costs, this premium model is the smart choice for long-term use.
Energy Efficiency
Switch to single mode when drying one spool, cutting power use by nearly half to reduce operational costs.
Chamber Independence
Run separate temps for each chamber simultaneously, giving you unmatched flexibility for diverse printing needs.
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Buying Guide – How to Choose the Best Filament Dryer Box
Selecting the right dryer requires evaluating several key features based on your specific printing needs and environment.
Capacity and Spool Count
Determine how many spools you need to dry at once. Single-spool units are compact but slow, while 4-spool models save time for high-volume users.
Choose capacity based on your typical workflow to avoid bottlenecks.
Maximum Temperature Range
Different filaments require different drying temperatures. PLA needs lower heat (around 50°C), while engineering plastics like PC or Nylon need up to 80°C or higher.
Ensure the unit covers your highest required temperature.
Heating Technology
PTC heaters with fans offer faster and more even drying than static heating pads. Air circulation prevents hot spots and speeds up moisture removal significantly.
Prioritize fan-assisted models for quicker results.
Sealing and Moisture Protection
Airtight seals with silicone rings or plugs are essential to prevent humidity from entering during pauses. Look for designs with tight-fitting lids and cable ports.
Check sealing quality to ensure long-term protection.
User Interface and Controls
Touch screens or preset buttons make operation easier. Models with humidity displays or memory functions add convenience for daily maintenance.
Opt for intuitive interfaces to streamline your workflow.
Safety Features
Overheat protection and auto-shutdown prevent accidents during unattended drying. Alarms that detect fan failure add an extra layer of security for your workshop.
Verify safety certifications before purchasing.
Power Efficiency
Energy-saving modes allow you to run single chambers when full capacity isn't needed. Lower wattage models reduce electricity costs over time.
Consider energy modes if you dry often.
Footprint and Portability
Measure your workspace before buying. Larger units hold more but require significant desk or shelf space, which may not suit all environments.
Balance capacity with available physical space.
How to Use and Care for Your Filament Dryer Box
Place the spool inside the chamber and route the filament through the sealed outlet port. Ensure the cable plug is tight to maintain the internal sealed environment effectively.
Set the appropriate temperature based on your filament type using the touch panel or buttons. For standard PLA, around 50°C is sufficient, while ABS may require 70°C.
Allow the dryer to run for the specified time, checking if humidity levels drop on the display. After use, let the unit cool before moving it to avoid damaging the heating elements.
Frequently Asked Questions
How long does it take to dry filament in a dryer box?
Drying time depends on moisture content and temperature settings. Generally, a fully saturated spool takes 6 to 12 hours, while damp spools may need less time.
Can I dry multiple filament types simultaneously?
Yes, dual-chamber models allow you to dry different types at once. Single-chamber units require sequential drying if you need different temperatures.
Do filament dryers need to be sealed during printing?
Ideally, yes. Keeping the outlet sealed prevents moisture from re-entering. Ensure the exit hole is closed tight except for the filament path.
What happens if I dry PLA at too high a temperature?
Exceeding 60°C can melt or warp PLA. Always check manufacturer guidelines and stay within the safe range for your specific material.
Is a hygrometer necessary for these boxes?
A hygrometer helps track humidity accurately. While not strictly required, it ensures you know when filament is dry enough to use.
Can I leave filament in the dryer for extended periods?
Yes, if the unit maintains safe temperatures. However, most are designed for active drying cycles rather than permanent storage.
Are these dryers safe to leave unattended?
Most have safety features like thermal fuses. Always follow the manufacturer's guidelines and avoid leaving them unattended for days at a time.
Final Thoughts on Choosing the Best Filament Dryer Box
Choosing the right filament dryer box depends heavily on your printing volume and material needs. High-capacity models like the Creality X4 offer unmatched efficiency, while budget units like the SUNLU S1 Plus provide essential drying without breaking the bank.
Prioritize features like dual chambers or real-time humidity monitoring if you work with diverse materials. Ensuring your choice handles the temperature range you need will save time on failed prints and wasted filament.
Remember that prices and availability change regularly. Check current offers before buying to get the best deal on the features that matter most for your setup.