Creality Filament Dryer Box 4 Spools, Space Pi X4 Filament Storage Box
4.6Editor score
Dual 200W heating chambers
Heats up to 85 degrees C
Illuminated window monitoring
Sealed enclosure design
In this guide
3D printing enthusiasts know that moisture ruins filament quality and print results. A reliable dryer box prevents stringing and clogging by keeping spools dry before and during use.
We analyzed ten leading models based on heating technology, capacity, and user feedback. Each entry features verified specs and real-world performance data to ensure accurate comparisons.
Every pick highlights key strengths and limitations so you can match features to your workflow. Note that availability and terms may change, so verify details before purchasing.
Top 3 Picks for Best 3D Printer Filament Dryer Box
SUNLU S4 3D Printer Filament Dryer Boxer, Black
4.7Editor score
Holds 4 spools simultaneously
350W fast PTC heating
Triple fan uniform drying system
Auto humidity control modes
Comgrow 3D Printer Filament Dryer Box, Comgrow 3D Filament Storages
4.4Editor score
Holds 2 spools capacity
LCD touch screen control
Silicone cable outlet
Temperature range 40 to 50 C
Top 10 Best 3D Printer Filament Dryer Box in 2026 Compared
The table below offers a side-by-side comparison of every model featured in this guide to help you quickly identify capacity, heating power, and unique features.
ProductsSpecificationsEditor scorePrice
Best Budget
Comgrow 3D Printer Filament Dryer Box
2 spools capacity
40 to 50 C temp
Silicone outlet design
LCD touch controls
4.4Editor score
Editor's Choice
Creality Filament Dryer Box 4 Spools
4 spools capacity
Up to 85 C temp
Dual heating chambers
Illuminated window
4.6Editor score
Best Premium
Creality 2026 New Upgrade Filament Dryer Box Pro
1KG spool compatible
Up to 65 C temp
Built-in fan
Knob interface
4.4Editor score
2026 New Creality Space PI Filament Dryer
360 degree heating
Up to 70 C temp
Touch screen UI
48 hours timer
4.4Editor score
SUNLU Filament Dryer Box 2026 New Upgrade S1 Plus
Fast drying fan
Up to 55 C temp
LCD display
Multi filament compatible
4.3Editor score
Polymaker Polydryer Filament Storage Box
Sealed enclosure design
Built-in hygrometer
Desiccant support
Up to 1KG spools
4.4Editor score
SUNLU 3KG Filament Dryer SP2 & Storage Box
Holds 3KG spool
250W PTC heater
Detachable base
LCD touch screen
4.4Editor score
Sovol Filament Dryer, SH02 Dry Box
Dual spool holes
Up to 70 C temp
One-key presets
Safety protection
4.3Editor score
SUNLU S4 3D Printer Filament Dryer Boxer
Holds 4 spools
350W PTC heater
Triple fans
Auto humidity control
4.7Editor score
SUNLU S1 Plus Filament Dryer
Ultra quiet design
Up to 55 C temp
2 inch LCD
Compatible with 1.75mm
4.7Editor score
1. SUNLU S4 – Best Overall Filament Dryer Box
SUNLU S4 3D Printer Filament Dryer Boxer, Black
4 spools capacity
350W PTC heater
Triple fan system
Auto humidity control
The SUNLU S4 stands out as a top performer with its ability to dry multiple spools simultaneously. Its strong ratings reflect reliability and efficiency in real-world printing environments.
Pros
- Holds four spools at once
- Very fast heating speed
- Advanced humidity features
- Quiet operation
- Solid build quality
Cons
- Higher price point
- Larger physical footprint
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Three internal fans ensure even heat distribution while the powerful heater reaches target temperatures quickly. Auto humidity control helps maintain ideal conditions without manual intervention.
While more expensive than basic models, the convenience of handling four spools and advanced safety features justify the investment for serious users.
Ideal for multi-color or high-volume printing setups where maintaining dry filament is critical. Its design supports uninterrupted workflow and consistent print quality.
Enhanced Airflow and Speed
The triple fan system ensures no hot spots develop, delivering uniform drying across all spools regardless of position.
Smart Safety Mechanisms
Triple-layer protection including thermal switches and software monitoring prevents overheating and ensures safe continuous operation.
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2. Creality Space Pi X4 – Premium Multi-Spool Solution
Creality Filament Dryer Box 4 Spools, Space Pi X4 Filament Storage Box
4 spools capacity
Up to 85 C temp
Dual heating chambers
Sealed enclosure
Creality offers this high-capacity unit designed for users managing extensive filament collections. Its ability to reach higher temperatures makes it suitable for demanding materials.
Pros
- High maximum temperature
- Dual chamber efficiency
- Illuminated monitoring window
- Sealed storage design
- Universal filament support
Cons
- Premium price
- Requires more space
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Independent heating chambers speed up the drying process significantly. The sealed enclosure prevents moisture reabsorption even after the drying cycle completes.
The illuminated window allows monitoring without breaking the seal which preserves humidity control. Controls are intuitive and support a wide range of filament types.
Best suited for professionals or enthusiasts needing robust storage and drying capabilities. Its construction supports consistent results across diverse printing projects.
Fast Dual Heating Design
Two independent heating zones allow faster moisture removal compared to single chamber systems reducing wait time for printing.
Flexible Filament Support
Supports both standard and high temperature filaments making it versatile for ABS, PC and other advanced materials.
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3. Comgrow Dryer Box – Best Value Entry Model
Comgrow 3D Printer Filament Dryer Box, Comgrow 3D Filament Storages
2 spools capacity
40 to 50 C temp
Silicone outlet
LCD touch screen
Comgrow provides a straightforward solution for drying filament without excessive features or cost. It performs reliably for common materials like PLA and PETG.
Pros
- Affordable pricing
- Simple interface
- Decent sealing
- Handles two spools
- Compact footprint
Cons
- Lower max temperature
- Limited filament presets
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The LCD screen simplifies setup and monitoring. Silicone outlets help maintain seal integrity while allowing filament feeding during operation.
While less powerful than higher-end units it suffices for occasional users or those printing with standard materials. Its compact size fits easily on most workbenches.
A practical choice for beginners or budget-conscious makers who need basic drying and storage functionality. Easy to operate and maintain.
Simplified Operation
Touch controls and clear display allow quick adjustments without complex menus or calibration steps.
Effective Sealing
The sealed design combined with cable outlets minimizes air exchange to keep spools dry during storage.
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4. Creality Space PI SE – Upgraded Single Spool Box
Creality 2026 New Upgrade Filament Dryer Box Pro, Space Pi SE
1KG spool compatible
Up to 65 C temp
Built-in fan
Knob control
This upgraded unit focuses on efficiency with a powerful fan and PTC heater that reach target temperatures quickly. It is suitable for quick pre-dry cycles.
Pros
- Quick heat-up time
- Good temperature range
- Insulated interior walls
- No assembly required
- Compatible with many materials
Cons
- Single spool capacity
- Requires vacuum storage after
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Thermal insulation helps maintain heat and protect hands during operation. The knob interface offers tactile control for adjusting time and temperature settings.
While limited to one spool it delivers consistent results for common filaments. Users are advised to seal dried spools promptly to prevent reabsorption.
Ideal for small workshops where space is tight. Its speed and simplicity make it a reliable companion for regular printing schedules.
Rapid Heating Performance
The fan-assisted circulation ensures rapid heat distribution reducing the time needed before filament is ready to print.
User Friendly Design
Ready out of the box with no assembly required making it accessible even for less technical users.
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5. Creality Space PI 2026 – Versatile Heating Box
2026 New Creality Space PI Filament Dryer
360 degree heating
Up to 70 C temp
Touch screen UI
48 hours timer
Creality enhances this model with a touch screen and preset options for various filament types. The PTC heater supports uniform drying across the chamber.
Pros
- Wide temperature range
- One-key presets
- Power-off memory
- Extended timer option
- Compatible with composites
Cons
- Single spool design
- No humidity sensor included
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Memory function retains settings after power loss which saves setup time. The touch screen allows switching between Celsius and Fahrenheit easily.
While it lacks built-in humidity monitoring its heating performance is solid for pre-drying before use. It supports composites like PLA-CF and PA-CF.
Recommended for users printing diverse materials who want preset convenience. Its flexible timer allows overnight drying sessions without worry.
Smart Preset Profiles
One-key settings reduce manual tuning by applying optimized parameters for different material types automatically.
Consistent Heating
360 degree circulation ensures even heat exposure preventing cold spots that could leave moisture behind.
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6. SUNLU S1 Plus – Efficient Dual Spool Dryer
SUNLU Filament Dryer Box 2026 New Upgrade S1 Plus
Fast drying fan
Up to 55 C temp
LCD display
Multi filament support
SUNLU improves this model with an added fan that speeds up moisture removal during drying cycles. It fits two standard spools comfortably.
Pros
- Compact dual spool capacity
- Fan-assisted drying
- Visual humidity display
- Personalized settings
- Customer support available
Cons
- Moderate temperature limit
- Basic control layout
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The display shows temperature and humidity allowing monitoring during operation. Custom settings allow users to adapt to local humidity conditions.
While not the fastest dryer it offers good value for regular users. The inclusion of customer support adds confidence for first-time buyers.
Best for hobbyists looking for reliable dual spool drying without high costs. Simple setup and straightforward operation.
Improved Airflow
The added fan reduces drying time by enhancing air circulation around the spools inside the chamber.
Visual Monitoring
Real-time data display helps track progress and confirm when filaments reach desired dryness levels.
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7. Polymaker Polydryer – Storage-Focused Solution
Polymaker Polydryer Filament Storage Box
Sealed enclosure design
Built-in hygrometer
Desiccant support
Up to 1KG spools
Polymaker focuses on long-term storage protection with a sealed box that limits moisture exposure. It works best alongside external drying methods.
Pros
- Integrated humidity monitor
- Strong sealing system
- Allows feeding while sealed
- Wide material support
- Simple and effective
Cons
- Passive drying only
- No heating element
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The hygrometer provides clear visibility of internal conditions. Users can insert desiccants to further enhance protection during pauses or storage.
While it does not heat filament it ensures spools stay dry after drying. The design supports printing without opening the seal fully.
Ideal for those who need reliable storage between prints. It prevents reabsorption effectively and pairs well with active dryers.
Moisture Control
Sealed design with hygrometer makes it easy to keep track of storage humidity without opening the box.
Seamless Workflow
Feed filament while maintaining a sealed environment to avoid exposure to humid air during print jobs.
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8. SUNLU SP2 – Large Spool Compatible Dryer
SUNLU 3KG Filament Dryer SP2 & Storage Box
Holds 3KG spool
250W PTC heater
Detachable base
LCD touch screen
SUNLU designed this model for larger spools making it suitable for commercial or high volume printing environments. It heats quickly and maintains even heat.
Pros
- Handles large spools
- Fast heating to 70 C
- Separate storage capability
- Touch controls
- Includes humidity monitor
Cons
- Heavier unit
- Takes more space
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The detachable base allows storage without exposing filament. A built-in hygrometer and desiccant support help keep conditions stable after drying.
Its size is larger than compact models but accommodates bigger capacity needs. Touch controls provide clear feedback during operation.
Recommended for users with 3kg spools who want integrated drying and storage. Robust construction supports frequent use.
Large Spool Capacity
Supports up to 3kg spools reducing changeover frequency for long prints or production runs.
Dual Function Design
Detachable storage box allows keeping filament sealed after drying to maintain dryness for future prints.
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9. Sovol SH02 – Dual Spool Dry Box with Safety
Sovol Filament Dryer, SH02 Dry Box
Dual spool holes
Up to 70 C temp
One-key presets
Safety protection
Sovol offers a dual hole design that supports printing from two machines simultaneously. It features improved sealing to protect filament effectively.
Pros
- Fits two printers
- Strong sealed design
- Smart safety features
- Efficient PTC heating
- Multiple material presets
Cons
- Fan alarm may sound
- Manual preset adjustment needed
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Safety mechanisms cut power if temperature exceeds limits and alert users if the fan stops. One-key presets simplify choosing drying parameters.
While robust it includes an alarm for component issues which adds responsibility to maintenance. Drying speeds are competitive with similar models.
Good for multi-printer setups needing consistent drying and protection. Reliable heating and safety features make it a practical option.
Dual Machine Support
Two feeding holes allow simultaneous drying for multiple printers which saves space on larger work areas.
Safety Protections
Overheat cutoffs and fan monitoring prevent equipment damage and ensure safe continuous operation during use.
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10. SUNLU S1 Plus (White) – Quiet and Compact
SUNLU S1 Plus Filament Dryer, White
Ultra quiet design
Up to 55 C temp
2 inch LCD
Compatible with 1.75mm
This white model emphasizes quiet operation making it suitable for shared workspaces. It provides clear monitoring of temperature and time.
Pros
- Very quiet operation
- Clear LCD monitor
- Rollers inside box
- Custom drying times
- Multiple material support
Cons
- Standard capacity
- Limited high temp range
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Rollers help with smooth feeding while drying and the LCD offers bright and clear visibility. Users can set times up to 99 hours.
Its quietness and simplicity make it a favorite for home users. While temperature options are standard they suffice for most materials.
Recommended for noise-sensitive environments where reliable drying is required. Its balance of features and performance supports consistent prints.
Quiet Performance
Designed to operate under 10dB reducing noise disruption during long drying or printing sessions.
Clear Monitoring
Large LCD display ensures readings are easy to see even from angles in dim lighting.
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Buying Guide – How to Choose the Best 3D Printer Filament Dryer Box
Selecting the right dryer requires understanding your workflow, filament types, and storage needs. Below are key factors to evaluate.
Capacity and Spool Size
Consider how many spools you need to dry at once. Some models hold two while others support four or larger 3kg spools. Check internal dimensions to ensure your brand of spools will fit.
Choose a model that matches your typical batch size and spool weight to avoid frequent reloading and save time.
Heating Technology and Range
PTC heaters generally offer more even heating than hot pads. Verify the maximum temperature; materials like ABS and PC require higher heat than PLA.
Select a heater with sufficient temperature range for your materials to prevent under-drying and ensure optimal print quality.
Sealing and Storage Design
A well-sealed box prevents moisture reabsorption during and after drying. Look for gaskets, latches, and sealed cable exits.
Prioritize models that allow feeding without breaking the seal to maintain dry conditions during printing pauses.
User Interface and Controls
Controls vary from knobs to touchscreens. Preset programs simplify operation for common materials. Ensure the display is readable and offers clear feedback.
Pick an interface that is intuitive and easy to adjust during operation to minimize downtime and confusion.
Humidity Monitoring
Built-in hygrometers help track internal conditions. Some models include auto humidity control to adjust drying automatically based on readings.
Models with humidity monitoring give better insight into when filament is dry and help avoid over-drying.
Safety Features
Look for overheat protection and fan failure alerts. These prevent fire hazards and equipment damage during long drying cycles.
Safety mechanisms are essential for unattended drying and ensure peace of mind during overnight sessions.
Noise Levels
Some dryers are noisy due to fans. If you print in shared spaces check decibel ratings and fan design.
Quieter units reduce disruption and are better for home offices or bedrooms where noise sensitivity is high.
Compatibility and Support
Ensure the unit fits your filament diameters and brands. Check if the manufacturer offers warranties or accessible customer support.
Good support and clear documentation help resolve issues quickly and extend the product's useful life.
How to Use and Care for Your 3D Printer Filament Dryer Box
Place the spool on the internal rollers ensuring filament feeds correctly to the exit port. Close all seals tightly before turning on the unit to maintain internal environment.
Set temperature and time based on filament type. Allow the unit to reach temperature before loading spools to ensure consistent heating from the start.
Regularly inspect seals and fans for debris. Clean the interior occasionally and store filament in sealed bags after drying to preserve dryness.
Frequently Asked Questions
How long should I dry my filament before printing?
Drying time varies by material and humidity. PLA may need 3 to 6 hours while nylon may require up to 12 hours. Use a hygrometer if available to confirm moisture levels.
Can I print while the filament is drying?
Yes, most dryer boxes allow feeding filament during operation. Ensure the seals remain intact to prevent moisture from re-entering the chamber during printing.
Do all filament dryers work with ABS and PETG?
Most do but check the maximum temperature. ABS and PETG usually need higher heat than PLA. Ensure the unit supports temperatures up to 70 degrees Celsius for these materials.
What happens if the dryer box loses power during use?
Many models save settings and resume when power is restored. Some may restart from the beginning. Check if your unit has memory or auto-resume functions.
Is a sealed dryer box better than an open one?
Sealed units prevent moisture reabsorption and maintain stable temperatures. Open designs allow more airflow but are less effective at keeping filament dry over time.
How do I clean the inside of a filament dryer?
Unplug the unit and wipe the interior with a dry cloth. Avoid liquids near electronics. Clean the fans periodically to maintain airflow and performance.
Can I use a dryer box for storage only?
Yes, some units are designed to maintain dryness after drying. Use desiccants and keep the seals closed to extend storage life between print jobs.
Are dryer boxes compatible with different filament brands?
Most standard 1.75mm and 2.85mm spools fit. Check internal dimensions and roller adjustability to ensure compatibility with larger or unusual spool sizes.
Final Thoughts on Choosing the Best 3D Printer Filament Dryer Box
The SUNLU S4, Creality Space Pi X4, and Comgrow Dryer Box lead the field for different reasons. They offer strong performance across capacity, speed, and value.
Prioritize features like humidity control, sealing quality, and material support that match your workflow. Safety and ease of use are equally important for long-term satisfaction.
Verify current availability and terms before purchasing. Selecting the right model will improve print reliability and extend the life of your filament stock.