Comgrow 3D Printer Filament Dryer Box
4.4Editor score
Stores two 1kg spools easily
LCD screen for real-time monitoring
Silicone cable sheath for sealing
In this guide
Moisture absorption is the silent killer of high quality 3D prints. A reliable 3D Printer Filament Dryer Box prevents humidity from ruining your spools and ensures consistent extrusion. Choosing the right unit means better surface finish, fewer clogs, and longer filament life.
We evaluated ten leading models based on heating speed, capacity, sealing quality, and user features. Our comparison includes active dryers with fans and passive storage boxes with desiccants. Each product offers unique advantages for different printing needs and budget levels.
Each pick below highlights specific strengths like multi spool capacity or smart humidity control. Prices and availability change frequently so check current listings before buying. Use this guide to find a dryer box that keeps your filament dry and ready for every print job.
Top 3 Picks for Best 3D Printer Filament Dryer Box
SUNLU S4 3D Printer Filament Dryer Boxer
4.7Editor score
Holds four 1kg spools simultaneously
350W PTC heater with triple fans
Smart auto humidity control system
Creality Filament Dryer Box 4 Spools
4.6Editor score
Dual 200W heating chambers
Handles up to eight five spools
Precision touch UI for settings
Top 10 Best 3D Printer Filament Dryer Box in 2026 Compared
The following table provides a side by side overview of key specifications and features across all ten models reviewed. Use this to quickly compare capacity, heating technology, and special functions before making your final decision.
ProductsSpecificationsEditor scorePrice
Best Budget
Comgrow 3D Printer Filament Dryer Box
Stores two 1kg spools
Temperature range 40 to 50C
2 inch LCD display screen
Silicone cable sheath outlet
4.4Editor score
Editor's Choice
Creality Filament Dryer Box 4 Spools
Holds four 1kg spools
Dual 200W PTC heating
Max temperature up to 85C
Illuminated window for monitoring
4.6Editor score
Best Premium
Creality Space Pi SE Filament Dryer
Handles one 1kg spool
360 degree hot air circulation
Temperature range 45 to 65C
Countdown timer for drying
4.4Editor score
Creality Space PI Filament Dryer
Supports 12 filament types
3.7 inch touch screen
48 hour timer function
Power-off memory for settings
4.4Editor score
SUNLU S1 Plus Filament Dryer
Fan assisted fast drying
Temperature range 35 to 55C
Compatible with multiple diameters
2 inch LCD display screen
4.3Editor score
Polymaker Polydryer Storage Box
Sealed with desiccant support
Built in hygrometer monitor
Print without breaking seal
Fits up to 1kg spools
4.4Editor score
SUNLU SP2 3KG Dryer Box
Handles up to 3kg spool
250W PTC heating element
Detachable storage base included
HD LCD touch screen
4.4Editor score
Sovol SH02 Dry Box
Dual spool drying holes
150W PTC heater inside
One key preset for types
Smart safety temperature protection
4.3Editor score
SUNLU S4 Filament Dryer
Holds four 1kg spools
350W PTC heater speed
Triple fans for uniform drying
Auto humidity control mode
4.7Editor score
SUNLU S1 Plus Filament Dryer
Quiet operation below 10db
Adjustable time 1 to 99h
Two rollers for feeding
Wide filament diameter support
4.7Editor score
1. SUNLU S4 Filament Dryer Boxer – Best Overall 3D Printer Filament Dryer Box
SUNLU S4 3D Printer Filament Dryer Boxer
Capacity for 4 spools
350W heating with 3 fans
Auto humidity control range
Triple security safety features
The SUNLU S4 stands out as the best overall choice for serious 3D printing enthusiasts. With a perfect rating of 4.7 from users it delivers unmatched performance for multi spool drying and storage. Its large capacity supports endless printing without frequent reloading.
Pros
- Large four spool capacity
- Very fast heating speed
- Smart auto humidity control
- Excellent temperature uniformity
Cons
- Higher price point
- Requires significant desk space
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This model features a powerful 350W PTC heater that heats up 50 percent faster than competitors. Three built in fans ensure temperature balance stays within plus or minus 3 degrees across the entire chamber. The smart auto humidity control automatically starts drying when humidity exceeds your set range and stops when it drops below 25 percent.
While the price is higher than budget options the investment pays off in efficiency and safety. The triple layer security system including PTC temperature switch and software protection prevents overheating risks. Users appreciate the ability to connect to four printers simultaneously for multi color projects.
If you run a busy print farm or need multi color capability the SUNLU S4 is the top recommendation. It handles 99.99 percent of filaments and comes with professional after sales support. This box transforms your workflow by keeping every spool dry and ready at all times.
Multi Spool Printing Freedom
Holding four 1kg spools allows you to switch colors without stopping production or opening the box.
Intelligent Moisture Management
The auto humidity control reduces manual intervention by maintaining optimal conditions automatically.
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2. Comgrow Filament Dryer Box – Best Budget 3D Printer Filament Dryer Box
Comgrow 3D Printer Filament Dryer Box
Stores two 1kg spools
40 to 50C temp range
2 inch LCD touch screen
Silicone cable sealing outlet
The Comgrow Filament Dryer Box offers the best value for beginners or casual users. It maintains a solid 4.4 rating for its ability to keep filaments dry during printing. The large storage volume accommodates two standard 1kg spools comfortably.
Pros
- Affordable entry price
- Clear LCD interface
- Good sealing design
- Fits common spool sizes
Cons
- Lower max temperature
- Limited to two spools
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Operating is simple with a 2 inch LCD screen and touch buttons. You can set temperature between 40 and 50 degrees Celsius and duration from 6 to 12 hours. The sealed structure uses a silicone cable sheath to prevent moisture re absorption while printing.
Some users note the maximum temperature is lower than premium models which limits use with high heat materials. The motherboard auto shuts down if not properly set which may confuse new users. However after sales support is responsive and provides solutions within 24 hours.
This box is ideal for those who print with PLA ABS or Silk filaments primarily. It solves common issues like stringing and poor adhesion caused by moisture. For the price it delivers reliable drying performance without expensive features you might not need.
Simple Control Interface
The touch screen makes setting temperature and time straightforward for any skill level.
Effective Sealing
The silicone sheath and snap button cover ensure dry storage when not in use.
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3. Creality Space Pi X4 Filament Dryer – Best Premium 3D Printer Filament Dryer Box
Creality Filament Dryer Box 4 Spools
Holds 4 standard 1kg spools
Dual 200W heating chambers
Max 85C for advanced filaments
Industry first touch UI
The Creality Space Pi X4 represents a premium tier option for power users needing fast reliable drying. Its 4.6 rating reflects satisfaction with the dual heating chambers and spacious storage. It holds four 1kg spools or two large 2kg spools comfortably.
Pros
- Dual independent heating zones
- High max temperature 85C
- Large capacity for storage
- Precise touch interface
Cons
- Premium price point
- Larger physical footprint
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Two independent 200W heating chambers allow moisture removal up to 30 percent faster than single chamber dryers. The touch UI enables precise temperature control from 50 to 60 degrees for common filaments or up to 85 degrees for advanced materials like ABS or Polycarbonate. This flexibility ensures any filament type is handled effectively.
The illuminated window lets you monitor spools without breaking the humidity sealed enclosure. Users report significant improvements in print quality with less bubbling and stringing. The only drawback is the higher cost which may not suit beginners just starting out.
Invest in this box if you frequently print with high performance materials or need high volume storage. It extends filament shelf life and ensures consistent results across long print sessions. The build quality and advanced features justify the investment for professional workflows.
Advanced Material Support
Heating up to 85C unlocks drying for tough filaments like PA PC and ASA.
Dual Chamber Efficiency
Independent chambers dry multiple spools simultaneously without temperature drops.
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4. Creality Space Pi SE – High Efficiency Drying
Creality Space Pi SE
Upgraded PTC with fan
Heats to 65C in 15m
Temperature range 45 to 65C
Real-time humidity monitoring
The Creality Space Pi SE is a strong mid range option focused on efficiency and ease of use. It holds a 4.4 rating and features an upgraded PTC solution that heats quickly. The built-in fan circulates hot air 360 degrees for even drying results.
Pros
- Fast heating time
- 360 degree air circulation
- Countdown timer display
- No assembly required
Cons
- One spool capacity only
- Thermal insulation adds bulk
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This model reaches 65 degrees Celsius within just 15 minutes thanks to efficient PTC technology. Thermal insulation cotton on the inner wall keeps heat in and prevents accidental burns. You can set drying time from zero to 24 hours and adjust temperature between 45 and 65 degrees.
While it only holds one spool the compact design fits neatly on most desks. The display screen and knob make operation intuitive without complex menus. Some users recommend storing filament in a vacuum bag after drying for best long term storage results.
Select this model if you need reliable single spool drying without extra cost. It solves common issues like drawing and clogging effectively. The real time humidity monitoring helps you track drying conditions accurately before starting your next print.
Rapid Heating Performance
Quick heat up times reduce waiting periods before prints can begin.
Safe Design
Thermal insulation prevents burns while maintaining consistent internal temperature.
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5. Creality Space PI Dryer – Wide Filament Compatibility
Creality Space PI Dryer
3.7 inch LCD touch screen
One-key preset for 12 types
48 hour timer function
Power-off memory feature
The Creality Space PI Filament Dryer offers excellent versatility for mixed filament users. It earns a 4.4 rating for its large touch screen and extensive material presets. The 3.7 inch display provides clear visibility of drying conditions from any angle.
Pros
- Large touch screen interface
- Supports 12 filament presets
- Long 48 hour timer
- Remembers settings after power off
Cons
- Mid range price
- Standard 1kg capacity
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One key settings allow instant selection for up to 12 filament types including composites like PLA-CF and PA-CF. You can adjust temperature freely from 45 to 70 degrees and set timers up to 48 hours. The power off memory feature ensures you do not lose settings after an outage.
The 110W PTC heater ensures uniform drying without hot spots. This model handles both common and high performance filaments effectively. Users note it works well with high speed printers for fast reliable results.
Choose this dryer if you work with a variety of material types regularly. The touch screen and presets simplify workflow for busy makers. It is a reliable upgrade from basic dryers offering modern control and extended storage capacity.
Presets for Composites
Pre configured settings save time when switching between complex materials.
Long Duration Timer
Set up to 48 hours to fully dry tough filaments without intervention.
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6. SUNLU S1 Plus – Fan Assisted Drying
SUNLU S1 Plus
Fan design speeds drying
Temp range 35 to 55C
Visual LCD display
Compatible with 3mm filaments
The SUNLU S1 Plus improves on standard dryers with a dedicated fan design. Its 4.3 rating reflects strong performance in reducing stringing and clogging issues. The fan speeds up moisture discharge from filaments significantly.
Pros
- Fan reduces drying time
- Clear visual display
- Adjustable personalized settings
- Supports 3.00mm filaments
Cons
- Lower max temperature
- Fan noise possible
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A 2 inch LCD screen accurately displays temperature time and humidity in real time. You can adjust temperature between 35 and 55 degrees Celsius based on your specific filament. The visual display makes monitoring easy without needing to open the box.
While the max temperature is lower than some rivals it suits most common materials well. Customer support is available for technical questions and troubleshooting. Users find print quality improves with smoother surfaces and better layer adhesion.
This model is great for those who want faster drying without complex controls. It fits a wide range of filament diameters including 3.00mm. The personalized settings allow you to tailor drying to your environment.
Fan Enhanced Performance
Built in fan accelerates moisture removal for quicker turnaround.
Clear Monitoring
Visual display ensures you know exact conditions inside the box.
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7. Polymaker Polydryer – Passive Storage Solution
Polymaker Polydryer
Sealed with desiccant
Built in hygrometer
Print without breaking seal
Fits up to 1kg spools
The Polymaker Polydryer takes a passive approach to filament protection. It holds a 4.4 rating for its reliable sealed design combined with desiccant support. This box is ideal for storing moisture sensitive filaments between prints.
Pros
- No power required
- Hygrometer for monitoring
- Prints directly from box
- Affordable cost
Cons
- No active drying
- Requires desiccant refills
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A built in hygrometer lets you track humidity levels without guesswork. The sealed enclosure prevents moisture re absorption even when not powered on. You can feed filament into your printer while keeping the spool inside the box.
Unlike active dryers this unit does not heat but relies on air tight storage and desiccants. It supports multiple diameters up to 3.00mm and fits neatly into most workspaces. Users appreciate the simplicity and effectiveness for long term storage.
Choose this box if you primarily need dry storage rather than active drying. It is an affordable solution for protecting expensive filaments. Combine with desiccant packs for best results in humid environments.
No Power Needed
Passive design means no electricity required for ongoing storage protection.
Visual Humidity Tracking
Hygrometer provides clear data on internal conditions.
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8. SUNLU SP2 3KG Dryer – Large Capacity
SUNLU SP2 3KG Dryer
Handles 3kg spool
250W PTC heater
Detachable storage base
Dual PTFE tubes
The SUNLU SP2 is designed for users who need to accommodate large spools. It earns a 4.4 rating for its 250W PTC heating and spacious capacity. It can hold two 1kg spools or even a large 3kg spool.
Pros
- Holds large 3kg spools
- Detachable storage base
- Fast heating to 70C
- Handles multiple spools
Cons
- Bulky design
- Requires desk space
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Heating reaches 70 degrees Celsius in 15 minutes for rapid drying. The unit features detachable base for flexible storage after drying. Six silicone holes and two PTFE tubes offer flexibility for drying multiple filaments at once.
The sealing performance is superior with sliding latches and gaskets to maintain dry conditions. An HD LCD screen displays temperature time and humidity clearly. Users find the rollers hold various spool sizes effectively.
This model is best for those who print with large format or industrial filaments. The detachable base adds convenience for storage. It delivers consistent results with low noise during operation.
Large Spool Support
Rollers accommodate up to 3kg spools reducing waste.
Detachable Storage
Separate base allows you to store filament after drying.
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9. Sovol SH02 Dry Box – Dual Spool Design
Sovol SH02 Dry Box
Dual spool holes
150W PTC heater
9 filament presets
Smart safety protection
The Sovol SH02 offers dual spool drying capability for two printers. It holds a 4.3 rating and uses a 150W PTC heater for efficiency. The newly designed holes suit different extruder positions on various 3D printers.
Pros
- Dries two spools
- One key presets
- Strong sealing design
- Safety cut off
Cons
- Requires desiccant bags
- Fan may be noisy
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You can set temperatures from 40 to 70 degrees and choose from nine filament presets instantly. The sealing is improved over previous models to protect filaments even when powered off. If PTC exceeds 130C it cuts off heating automatically.
Using desiccant bags enhances drying efficiency inside the box. Users report better print quality with fewer interruptions. The smart safety features prevent overheating and ensure reliable operation.
This box suits those who run two printers simultaneously and need consistent drying. It saves space by consolidating drying for multiple machines. The presets simplify setup for common materials like PLA PETG and ABS.
Dual Printer Ready
Feed two printers at once without switching spools.
Auto Safety Cut Off
Protects hardware and filament from temperature spikes.
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10. SUNLU S1 Plus White – Ultra Quiet Operation
SUNLU S1 Plus White
Below 10db quiet operation
Time 1 to 99 hours
Two rollers for feeding
Max 3mm diameter
The SUNLU S1 Plus in white offers whisper quiet performance for home offices. It maintains a strong 4.7 rating and operates below 10 decibels during use. This makes it ideal for shared living spaces or late night printing.
Pros
- Very quiet below 10db
- Wide time range
- Good screen visibility
- Roller feeding design
Cons
- Lower max temp
- White shows dust
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Adjustable drying time ranges from 1 to 99 hours providing flexibility for various materials. Two rollers inside allow smooth feeding while drying. The 2 inch LCD screen clearly displays temperature and time for easy monitoring.
While the max temperature is limited to 55C it is sufficient for most common filaments. Users find it reduces stringing and clogging effectively. The design ensures a consistent print experience with minimal noise.
Select this model if you need a quiet reliable dryer for daily use. It fits most standard spool sizes and supports multiple diameters. The white finish keeps your workspace looking clean and organized.
Quiet Operation
Under 10db ensures no disturbance to work or sleep.
Flexible Timing
Set up to 99 hours for thorough drying of sensitive materials.
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Buying Guide – How to Choose the Best 3D Printer Filament Dryer Box
Choosing the right 3D Printer Filament Dryer Box requires understanding your printing needs and budget. The following factors will help you select the ideal model for your setup.
Capacity and Spool Count
Consider how many spools you need to store or dry simultaneously. Some models hold one 1kg spool while others support four or more. Larger capacity reduces frequent reloading and supports multi color projects effectively.
Pick a capacity that matches your typical print volume and material variety.
Heating Technology
Active dryers use PTC heaters and fans to remove moisture quickly. Passive boxes rely on desiccants and sealing. Active units reach higher temperatures suitable for nylon or polycarbonate filaments.
Look for even heat distribution to avoid damaging filament properties.
Temperature Range
Different materials require specific drying temperatures. PLA needs lower heat while ABS and nylon require higher temperatures. Ensure the box supports the range needed for your materials.
Check maximum temperature limits before purchasing to avoid material limitations.
Sealing Quality
A good seal prevents moisture re-absorption during printing. Silicone gaskets and latch systems improve this. Without proper sealing humidity will return quickly after drying.
Test the seal tightness when the box is closed.
User Interface
LCD screens and touch controls make setting temperature and time easier. Some models offer one-key presets for specific filaments. A clear display helps monitor drying progress without opening the box.
Choose an interface that suits your technical comfort level.
Timer Functions
Flexible timer settings allow overnight drying without supervision. Look for models with auto shut-off to save energy. Some units remember settings after power outages for convenience.
Longer timers suit tough materials like nylon that need hours to dry.
Safety Features
Overheat protection and automatic cut-offs protect your filament and home. Safety is critical when leaving dryers unattended. Check for certifications and user reviews regarding reliability.
Prioritize models with built-in thermal safeguards.
Budget and Value
Prices range from affordable passive boxes to expensive multi-spool active dryers. Determine how much you will use it to justify cost. Often a mid-range active dryer offers best performance per dollar.
Balance upfront cost against long-term filament savings.
How to Use and Care for Your 3D Printer Filament Dryer Box
Place your filament spool inside the box and feed the end through the designated port. Ensure the seal is tight before powering on the unit to maintain optimal humidity levels inside.
Set temperature and time according to your filament type using the control panel. For best results dry for several hours before starting long prints to ensure moisture removal.
Clean the interior regularly and replace desiccant packs if using a passive model. Check ports for debris to ensure smooth filament feeding and maintain long term performance.
Frequently Asked Questions
Does a filament dryer box remove moisture from already wet filament?
Yes an active filament dryer box is designed to remove moisture from damp filament quickly. Heating and airflow accelerate this process compared to storage alone. Always dry filament before printing to avoid quality issues.
What temperature should I set for PLA filament drying?
For PLA set the dryer between 40 and 50 degrees Celsius. Higher temperatures can deform PLA. Refer to your filament manufacturer recommendations for exact settings to prevent damage.
Can I print while filament is inside the dryer box?
Most modern dryer boxes allow feeding filament directly from the box to the printer. This keeps the spool sealed while printing maintaining dry conditions throughout the job. Check your model's compatibility for this feature.
Do passive storage boxes dry filament or just keep it dry?
Passive boxes use desiccants and sealing to prevent moisture absorption but do not actively dry wet filament. They are ideal for long term storage. For wet filament an active dryer is required.
How often should I dry my filament before printing?
If filament has been exposed to humid air dry it for several hours before use. Frequent dryers may need daily drying. Always monitor humidity levels to decide when drying is necessary.
Can I use a filament dryer for multiple filament types?
Yes most dryers support various types like PLA PETG ABS and TPU by adjusting temperature. Ensure the model covers your needed temperature range. Some offer presets for convenience.
What happens if humidity rises inside the dryer box?
In active models humidity sensors may trigger auto drying modes. In passive boxes humidity increases over time requiring desiccant replacement. Monitor readings to maintain consistent conditions.
Is it safe to leave a filament dryer unattended?
Most modern units include safety features like overheat protection and auto shut-off. However always ensure the room is ventilated. For long durations check manufacturer guidelines for unattended operation.
Final Thoughts on Choosing the Best 3D Printer Filament Dryer Box
The SUNLU S4 Comgrow and Creality Space Pi X4 stand out as top choices for different needs. Each model balances capacity temperature range and usability effectively for your setup.
Prioritize capacity and temperature range based on your materials. Active drying is essential for moisture prone filaments like nylon while passive storage works for dry conditions.
Check current prices and availability before purchasing as deals change often. Investing in a quality dryer box protects your filament budget and ensures consistent print results.