SUNLU Filament Dryer Box 2026 New Upgrade S1 Plus
4.3Editor score
Fast fan-assisted drying
2-inch LCD display
35 to 55 degrees C
In this guide
Moisture is the silent enemy of high-quality 3D printing, causing stringing, bubbling, and poor layer adhesion. A reliable filament dryer box actively removes humidity from your spools, ensuring consistent material performance and reducing waste over time.
We evaluated ten leading models based on heating technology, capacity, sealing quality, and user interface. Our analysis focuses on real-world performance data to help you identify the best solution for your specific filament types and printing environment.
Each pick below highlights unique strengths, from budget-friendly single-spool units to high-capacity dual-chamber systems. Remember that availability and specifications can change, so verify current details before making your final purchase decision.
Top 3 Picks for Best Filament Dryer Box
Comgrow 3D Printer Filament Dryer Box SH01
4.4Editor score
Large 2-spool storage
Real-time monitoring
Sealed cable outlet
Creality Filament Dryer Box 4 Spools Space Pi X4
4.6Editor score
Dual independent chambers
Up to 85 degrees C
Illuminated window
Top 10 Best Filament Dryer Box in 2026 Compared
The following table provides a side-by-side comparison of all ten featured models, highlighting their key specifications to help you quickly identify the unit that best matches your printing volume and material requirements.
ProductsSpecificationsEditor scorePrice
Best Budget
SUNLU S1 Plus
Single spool capacity
35 to 55 degrees C
LCD temperature display
Fan-assisted drying
4.3Editor score
Editor's Choice
Creality Space Pi X4
Four spool capacity
Up to 85 degrees C
Dual heating chambers
Illuminated window
4.6Editor score
Editor's Choice
Comgrow SH01
Two spool capacity
40 to 50 degrees C
LCD monitoring
Sealed cable outlet
4.4Editor score
Polymaker Polydryer
Single spool storage
Desiccant compatible
Hygrometer included
Silicone sealing
4.4Editor score
SUNLU S2
Large capacity design
35 to 70 degrees C
Translucent lid
Touch screen control
4.3Editor score
Comgrow SH02
Two spool capacity
40 to 70 degrees C
360-degree heating
Nine filament presets
4.4Editor score
Creality Space Pi Dryer
Single spool design
45 to 70 degrees C
360-degree heating
Twelve presets
4.4Editor score
Creality Space Pi Plus
Dual spool capacity
45 to 70 degrees C
Humidity monitor
Power-off memory
4.4Editor score
Creality Space Pi X4L
Four spool capacity
Up to 75 degrees C
Dual chambers
Illuminated window
4.5Editor score
Creality DB-05
Four spool capacity
Up to 85 degrees C
Dual independent chambers
RFID compatible
4.6Editor score
1. SUNLU S1 Plus – Best Budget Moisture Control
SUNLU S1 Plus
Fan-assisted drying
35 to 55 degrees C
Visual LCD display
Compatible with all types
The SUNLU S1 Plus stands out as a top budget-friendly option for managing filament moisture effectively. It holds a solid 4.3 rating and features an upgraded fan design that significantly speeds up the discharge of excess water compared to passive models.
Pros
- Fast moisture removal
- Clear temperature display
- Easy manual adjustments
- Supports all filament types
Cons
- Single spool only
- Lower max temperature
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Its standout quality is the visual display, which accurately detects and shows temperature, time, and humidity on a 2-inch LCD screen. Users can easily adjust settings between 35 and 55 degrees Celsius to suit different materials like PLA or PETG.
While it lacks the capacity of larger units, the personalization settings allow for precise control over drying cycles. The high compatibility ensures it works well with 1.75mm, 2.85mm, and 3.00mm filaments from major brands without issues.
This dryer is ideal for hobbyists who print frequently but do not need to dry multiple spools simultaneously. Its straightforward design and effective drying capability make it a strong recommendation for those entering the filament maintenance space.
Enhanced Drying Efficiency
The fan design accelerates moisture removal, reducing the time filament needs to sit before printing.
Clear User Interface
The LCD screen provides real-time feedback, ensuring you can monitor the drying process without guessing.
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2. Creality Space Pi X4 – Best High-Capacity Solution
Creality Space Pi X4
Four spool capacity
Dual heating chambers
Up to 85 degrees C
Sealed storage function
The Creality Space Pi X4 represents a premium choice for users with high-volume printing needs. With a 4.6 rating, it offers spacious storage for four standard 1kg spools or two large 2kg spools, making it the ultimate solution for busy workshops.
Pros
- Holds four spools
- Independent temperature zones
- Fast 85 degree heat
- Illuminated monitoring window
Cons
- Higher cost point
- Requires significant space
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Its dual independent 200W heating chambers allow for drying up to two different filament types simultaneously at different temperatures. This efficiency is unmatched, removing moisture 30% faster than single-chamber dryers and preventing issues like bubbling and stringing.
Beyond active drying, it functions as a long-term storage unit with a silicone-sealed enclosure. This design prevents moisture re-absorption 24/7, ensuring spools remain print-ready even during extended printing pauses without breaking the humidity control.
For professionals or serious enthusiasts managing diverse material inventories, this model provides the scalability and performance needed to maintain consistent quality. The industry-first touch UI further simplifies operation for complex filament requirements.
Dual Chamber Flexibility
Independent zones let you dry ABS and PLA at the same time with different target temperatures.
Long-Term Storage
The sealed environment acts as a safe haven for unused spools, extending their shelf life.
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3. Comgrow SH01 – Best Overall Value
Comgrow SH01
Two spool capacity
Internal heating during print
LCD monitoring screen
Silicone cable seal
The Comgrow SH01 is our Editor's Choice for its balance of capacity and cost. It holds a 4.4 rating and stores two rolls of 1kg spools, offering a large internal size that fits various filament types without cramping.
Pros
- Large storage volume
- Works during printing
- Clear temperature display
- Effective sealing design
Cons
- Max temp limited to 50 degrees
- Shut down if idle
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Its unique design allows for internal heating during printing, which keeps filament dry as it feeds into the printer. This avoids common issues like clogging and layer migration caused by dampness, ensuring a smoother print surface.
The device features a 2-inch LCD screen for real-time monitoring of temperature and humidity, making operation straightforward. The outlet structure uses a silicone cable sheath for a smooth feed while maintaining a good seal against external moisture.
Ideal for general users who want reliable drying without complex setups, this model delivers consistent results. Its simple operation and effective moisture removal make it a practical addition to any standard 3D printing station.
Active Drying While Printing
Heating the filament during use prevents moisture absorption that often happens after long print jobs.
Robust Sealing
The snap button structure on the cover and silicone seals ensure moisture stays out effectively.
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4. Polymaker Polydryer – Best Passive Protection
Polymaker Polydryer
Desiccant compatible
Hygrometer included
Airtight enclosure
Fits up to 1kg
The Polymaker Polydryer focuses on consistent protection without active heating elements. With a 4.4 rating, it helps keep moisture-sensitive filament in a better printing state by reducing exposure to humid air between uses.
Pros
- Simple airtight design
- Built-in humidity monitor
- No external power needed
- Easy filament feeding
Cons
- No active heating element
- Requires manual desiccant
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Unlike electric dryers, this solution relies on a sealed enclosure design combined with desiccant support to lock out moisture. This approach is ideal for longer-term storage needs where you want to keep spools dry while waiting for the next job.
A built-in hygrometer allows you to track storage conditions easily, providing a visible humidity reading to judge the environment without guesswork. This helps maintain a suitable climate for your filament using simple passive management.
This model is perfect for users who print occasionally and prefer a low-maintenance storage solution. It supports various types including PLA, PETG, and ABS, making it a versatile option for keeping your material in peak condition.
Passive Moisture Control
The desiccant and sealed design work together to maintain a dry environment without electricity.
Visual Monitoring
The hygrometer makes it simple to see when your desiccant needs refreshing or the seal is compromised.
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5. SUNLU S2 – Best for Reviving Old Spools
SUNLU S2
Customizable drying time
35 to 70 degrees C
Translucent lid
Large capacity
The SUNLU S2 is designed specifically to remove excess moisture and revive old filament that has been stored for a while. It holds a 4.3 rating and offers a large capacity of 265x274x118mm to handle substantial spool sizes.
Pros
- Revives damp filament
- High temperature range
- Touch screen ease
- Spindle ensures even drying
Cons
- Large footprint
- Heating time may vary
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Its fast heating capability ensures the dryer reaches preset temperatures quickly, while the built-in spindle keeps the filament spinning continuously for even drying. Users can customize times from 0 to 99 hours to suit specific material requirements.
The large touch screen makes it simple to set different dry temperatures and times with just a tap, ensuring user-friendly operation. A translucent lid allows you to check on the filament progress without opening the lid and breaking the drying environment.
This dryer is a great investment for those who have their printers in humid locations like basements. It optimizes the printing process by ensuring damp materials are restored to optimal condition, reducing waste and improving print quality.
Revival Capability
Specifically engineered to restore old, damp filament that would otherwise be unusable or problematic.
Even Drying Mechanics
The internal spindle ensures the entire length of the spool gets uniform heat treatment.
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6. Comgrow SH02 – Best for Multiple Filament Types
Comgrow SH02
Two spool capacity
150W PTC heater
9 filament presets
Sealing rings
The Comgrow SH02 distinguishes itself with one-key temperature settings for nine different types of filaments, including PLA, ABS, and PC. It holds a 4.4 rating and accommodates two rolls of 1kg filament, making it efficient for dual-printer setups.
Pros
- One-key filament settings
- 360-degree heating
- Multiple safety features
- Large capacity
Cons
- Max 70 degrees C
- Fan maintenance required
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Its 150W PTC heater allows it to reach 50°C in seven minutes, circulating hot air 360° for uniform heating. The intelligent safety protection automatically cuts off heating if the temperature exceeds 130°C to prevent burning out the module.
The sealed design uses multiple sealing rings to keep consumables from getting wet during storage. The outlet structure is convenient for 3D printers with different extruder positions, ensuring flexibility in how you connect it to your workspace.
This model is best for users who work with a variety of materials and want a simple interface. Its preset options save time, and the dual-spool capacity helps streamline workflow for those with diverse printing projects.
Quick Heating Performance
The fast PTC heater reduces wait times, getting your filament dry quickly and efficiently.
Material Versatility
Presets for nine filament types mean you can switch materials without complex recalibration.
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7. Creality Space Pi Dryer – Best for High-Performance Filaments
Creality Space Pi Dryer
110W PTC heater
One-key for 12 filaments
48-hour timer
3.7-inch touch screen
The Creality Space Pi Dryer is built to handle both common and high-performance composite filaments like PLA-CF and PA-CF. It holds a 4.4 rating and uses a unique 110W PTC heater to ensure uniform drying without the hot spots common in other models.
Pros
- Supports composite filaments
- 360-degree uniform heat
- Power-off memory
- Easy touch interface
Cons
- Single spool only
- Requires 110V power
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A 3.7-inch touch screen provides easy operation, allowing you to track drying conditions and switch between Celsius and Fahrenheit effortlessly. The one-key set for 12 filament types simplifies the process of selecting the right settings for complex materials.
The power-off memory function ensures that the unit restarts and remembers your previous material and temperature settings after a power outage. This saves you the trouble of resetting everything and ensures fast drying resumes without interruption.
This dryer is ideal for those printing engineering materials that require precise temperature control. Its ability to handle advanced composites makes it a valuable tool for users looking to expand into higher-strength printing materials.
Advanced Material Support
Designed specifically to support composite filaments that are often sensitive to moisture absorption.
Convenient Control
The large touch screen and memory function make it easy to maintain your drying schedule.
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8. Creality Space Pi Plus – Best Dual-Spool Precision
Creality Space Pi Plus
Dual spool capacity
Real-time humidity monitor
360-degree hot air
12 filament presets
The Creality Space Pi Plus upgrades the standard model with a real-time humidity monitor, giving you precise feedback on internal conditions. It holds a 4.4 rating and supports dual spools, making it efficient for running two printers simultaneously.
Pros
- Monitors humidity actively
- Adjustable temp range
- Uniform heating tech
- Dual spool support
Cons
- Limited to 70 degrees C
- Requires space for dual spools
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Its 110W PTC heater warms the space uniformly, ensuring no part of the filament is under-dried. You can adjust the temperature freely between 45°C and 70°C to suit different materials, offering flexibility for various printing projects.
The one-key settings for 12 filament types allow you to select common and high-performance composites with ease. The 3.7-inch touch screen makes tracking these conditions simple, ensuring you can manage your drying cycle without complications.
This model is perfect for users who need to monitor humidity levels actively to prevent re-absorption. It provides the control needed for sensitive materials while offering the capacity to keep multiple spools ready for use.
Active Humidity Tracking
The real-time monitor ensures you know exactly when the environment is safe for printing.
Precision Adjustment
Free adjustment between 45 and 70 degrees allows fine-tuning for specific material properties.
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9. Creality Space Pi X4L – Best for High-Volume Storage
Creality Space Pi X4L
Four spool capacity
Up to 85 degrees C
Dual chambers
Illuminated window
The Creality Space Pi X4L is designed for high-volume users with a spacious storage capacity for four standard spools. It holds a 4.5 rating and features independent heating chambers that allow you to dry different filament types simultaneously.
Pros
- Holds four spools
- Independent heating
- High max temperature
- Sealed enclosure
Cons
- Large physical size
- Higher power requirement
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With a max temperature of 85°C, it unlocks advanced engineering filaments like ABS, PC, and PAHT. This capability ensures continuous and effective drying for materials that require higher heat to remove moisture completely.
The dual function allows for rapid drying during printing and maintains humidity control during pauses. The silicone-sealed enclosure prevents re-absorption 24/7, while the illuminated window lets you monitor spools without breaking the seal.
This dryer is a robust solution for professionals managing a large inventory of diverse materials. Its combination of capacity and performance makes it a top choice for those who need to keep multiple spools ready at all times.
High Temp Engineering
The 85-degree maximum allows you to tackle the most challenging and moisture-sensitive engineering materials.
Sealed Environment
A silicone-sealed enclosure keeps moisture out 24/7 for consistent storage between prints.
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10. Creality DB-05 – Best for Power Efficiency
Creality DB-05
Dual independent chambers
Up to 85 degrees C
Power-saving modes
RFID compatibility
The Official Creality Filament Dryer, DB-05, focuses on power efficiency without sacrificing performance. It holds a 4.6 rating and offers four spool capacity, allowing you to dry and print at once for maximum efficiency.
Pros
- Independent chamber control
- Dual chamber energy savings
- Handles engineering materials
- Efficient operation
Cons
- Requires Creality trays
- RFID tray recommendation
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Each chamber is equipped with an independent PTC heater, allowing simultaneous drying of two filament types at different temperatures. This flexibility lets you choose between single or dual chamber modes to save energy when full capacity isn't needed.
The dual 200W PTC heaters allow temperatures to reach up to 85°C, ensuring effective drying for engineering filaments like PA and PC. This continuous and effective drying process is crucial for maintaining the integrity of high-strength materials.
This model is ideal for eco-conscious users who need high performance but want to minimize power consumption. It supports up to four printers at once, making it a versatile and efficient solution for busy production environments.
Independent Chamber Control
Run two different filament types at once, each at the optimal temperature for its material.
Energy Efficiency
Operate in single chamber mode to save up to 40% energy compared to running both fully.
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Buying Guide – How to Choose the Best Filament Dryer Box
Selecting the right filament dryer box requires balancing capacity, temperature range, and sealing features with your specific printing workflow.
Capacity Requirements
Consider how many spools you need to dry or store simultaneously. Single-spool units are compact and affordable for hobbyists, while dual or quad-spool models support high-volume workflows and multi-printer setups.
Choose a model that matches your typical project size to avoid bottlenecks or wasted space on your workbench.
Heating Technology
Look for PTC heaters as they offer safer and more uniform heating compared to older resistive pads. Some models use fans to circulate air for faster drying, which is critical for materials that absorb moisture rapidly.
Prioritize units with even heat distribution to prevent hot spots that could damage sensitive filament like TPU.
Temperature Range
Ensure the dryer can reach temperatures high enough for your specific materials. While PLA needs low heat, engineering filaments like ABS or Nylon often require settings up to 65°C or higher to remove moisture effectively.
A wider temperature range provides flexibility to handle diverse materials without needing multiple devices.
Sealing Quality
A tight seal is essential to prevent re-absorption of humidity during the drying process. Look for silicone seals, airtight designs, and proper cable outlet plugs that maintain the dry environment.
Effective sealing ensures that the effort put into drying filament is not wasted when you open the box.
User Interface
Touch screens and intuitive controls make it easier to set precise temperatures and times. Models with digital displays for humidity and temperature help you track progress without guessing.
Choose an interface that simplifies your workflow, especially if you frequently switch between different material types.
Monitoring Features
Features like humidity monitors and illuminated windows add value by letting you check conditions without breaking the seal. This helps ensure your filament is ready for printing at all times.
Real-time feedback reduces the risk of starting a print with damp filament that could cause issues.
Safety Protections
Safety features such as automatic shut-offs if overheating occurs are vital for protecting your equipment. Look for alarms that alert you to fan failures or temperature spikes.
Investing in a model with robust safety mechanisms protects your workspace and ensures long-term reliability.
Compatibility
Verify that the dryer fits your filament diameter (1.75mm, 2.85mm, or 3.00mm) and spool size. Some units come with accessories to support larger 2kg spools.
Compatibility ensures you can use all your existing spools without needing to transfer them to different containers.
How to Use and Care for Your Filament Dryer Box
Place your spool(s) inside the dryer and ensure the filament feed hole is aligned with the printer. Secure any cable seals or plugs to prevent moisture from entering the chamber during operation.
Set the temperature and time according to the manufacturer's recommendations for your specific filament type. Use the LCD or touch screen to select the correct preset to avoid overheating or under-drying.
Regularly clean the interior and check the seals for dust or damage to maintain efficiency. Replace the desiccant if your model uses one to ensure continued moisture protection.
Frequently Asked Questions
Does a filament dryer box work with all filament types?
Most modern dryers support PLA, PETG, ABS, and TPU. However, check the maximum temperature range if you plan to dry engineering materials like Nylon or Polycarbonate, which require higher heat settings.
How long does it take to dry wet filament?
Drying times vary based on moisture content and model efficiency. Generally, spools can be ready in 4 to 8 hours for standard materials, while severely damp filament may require overnight cycles.
Can I use a dryer while printing?
Yes, many models are designed to hold the spool and feed filament directly during printing. This prevents moisture re-absorption between jobs and ensures consistent print quality throughout the process.
Is a dryer necessary if I store filament in sealed bags?
Even sealed bags can trap moisture if the filament was damp when packed. A dryer actively removes existing moisture, which is safer for long-term storage and improves print reliability significantly.
What is the difference between PTC and resistive heaters?
PTC heaters offer more uniform heating and self-limiting safety features that prevent overheating. Resistive heaters can sometimes create hot spots, which may lead to uneven drying or material degradation.
Do I need to replace the desiccant regularly?
If your dryer uses passive desiccant packs, they will eventually saturate and need replacement. Active heating dryers typically do not require this, but always check the specific maintenance instructions for your model.
Can a filament dryer damage my spool?
Using the correct temperature settings prevents damage. Excessive heat can warp spools or weaken filament, so always adhere to the recommended ranges provided by the filament manufacturer.
Are there energy-efficient models available?
Some modern units feature power-saving modes that run only one chamber when full capacity isn't needed. These designs help reduce electricity usage without compromising drying performance for daily use.
Final Thoughts on Choosing the Best Filament Dryer Box
The SUNLU S1 Plus offers an excellent entry point for those seeking affordable and effective drying, while the Creality Space Pi X4 stands out for high-volume professionals requiring dual-chamber efficiency.
Prioritize models that combine precise temperature control with strong sealing mechanisms to ensure your filament stays dry and ready for any project. Your choice should align with the specific materials you use most often.
Remember to verify current availability and features before purchasing, as product specifications can evolve over time.