Comgrow 3D Printer Filament Dryer Box
4.4Editor score
Holds two 1kg spools
Adjustable temperature range
LCD touch screen control
In this guide
Moisture is the silent killer of 3D printing quality. Even a small amount of humidity can cause filament to absorb water, leading to stringing, popping, and weak layers. A dedicated filament dryer solves this problem by actively removing moisture before and during your printing sessions.
We have evaluated the leading models on the market based on capacity, heating technology, ease of use, and price value. Our research focuses on units that offer reliable temperature control and effective sealing to protect your expensive materials from ambient humidity levels.
Each pick in this list highlights specific strengths like multi-spool storage, fast heating, or smart monitoring features. Prices and availability can change frequently so check the links below for the most current offers before making your final purchase decision.
Top 3 Picks for Best Filament Dryer for 3D Printing
Creality Filament Dryer Box 4 Spools
4.6Editor score
Dual heating chambers
Holds up to four spools
Fast drying technology
SUNLU S4 3D Printer Filament Dryer
4.5Editor score
Three circulation fans
350W PTC heater
Eight filament exit holes
Top 10 Best Filament Dryer for 3D Printing in 2026 Compared
The table below provides a side-by-side look at the key specifications and features of every model we reviewed to help you quickly find the right fit for your printer setup.
ProductsSpecificationsEditor scorePrice
Best Budget
Comgrow SH01
Capacity: 2 spools
Temp Range: 40-50C
Screen: 2 inch LCD
4.4Editor score
Editor's Choice
SUNLU S1 Plus
Capacity: 2 spools
Temp Range: 35-55C
Feature: Fan assisted
4.3Editor score
Editor's Choice
Creality Space Pi X4
Capacity: 4 spools
Temp Range: Up to 85C
Feature: Dual chambers
4.6Editor score
SUNLU S4
Capacity: 4 spools
Power: 350W heater
Feature: 3 fans
4.5Editor score
Creality Space PI Plus
Capacity: 2 spools
Temp Range: 45-70C
Feature: 12 presets
4.4Editor score
Polymaker Polydryer
Capacity: 1 spool
Feature: Desiccant support
Use: Dry store print
4.3Editor score
Creality Space Pi SE
Capacity: 1 spool
Temp Range: 45-65C
Feature: Knob control
4.3Editor score
SUNLU S4 Black
Capacity: 4 spools
Power: 350W heater
Feature: 8 exits
4.6Editor score
SUNLU SP2
Capacity: 3kg spool
Temp Range: Up to 70C
Feature: Fast heating
4.4Editor score
SUNLU S2
Capacity: 265x274mm
Feature: Translucent lid
Use: Revive damp sp
4.3Editor score
1. Comgrow 3D Printer Filament Dryer Box – Best Budget Option
Comgrow 3D Printer Filament Dryer Box
Capacity: 2 spools
Temp: 40-50C
Time: 6-12 hours
The Comgrow SH01 offers an accessible entry point into active filament drying. It carries a strong rating for its ability to hold two spools simultaneously while maintaining a dry environment during prints.
Pros
- Affordable price point
- Stores two spools
- Easy touch screen
Cons
- Lower max temperature
- Basic sealing system
We may earn a commission when you buy through this link, at no additional cost to you.
Its internal size accommodates standard 1kg spools and the temperature range suits most common materials like PLA and ABS. The LCD screen makes it simple to set the time and heat level without needing a manual.
The max temperature is capped at 50C which limits use on high heat materials like PC but works well for standard PLA and PETG. The sealing is adequate though not as robust as premium units.
This unit is ideal for hobbyists or beginners who want reliable moisture removal without a large upfront investment. It delivers consistent results for daily printing needs.
Spacious Two Spool Storage
The large volume allows you to keep two spools ready or dry them simultaneously to reduce downtime between projects.
Simple Touch Control Interface
Buttons and a clear screen let you adjust settings quickly so you can start your drying cycle with minimal effort.
We may earn a commission when you buy through this link, at no additional cost to you.
2. SUNLU S1 Plus – Solid All Round Performance
SUNLU Filament Dryer Box 2026 New Upgrade S1 Plus
Capacity: 2 spools
Temp: 35-55C
Feature: Fan design
The SUNLU S1 Plus improves on earlier models with a fan that circulates air to remove moisture faster. It fits well for users needing a reliable dryer for two spools.
Pros
- Fan speeds up drying
- Accurate sensor display
- Wide temp range
Cons
- Limited to two spools
- Plastic build quality
We may earn a commission when you buy through this link, at no additional cost to you.
The fan design helps reduce the impact of wet weather and speeds up the drying process compared to passive units. The LCD screen shows real time humidity which helps you track progress accurately.
While the range is good for most filaments the capacity is limited to two spools. The build is functional but feels light which might be a concern for long term heavy use.
Choose this if you want a balance of price and performance for standard printing tasks. It handles common materials well and offers quick setup for daily workflows.
Active Air Circulation
The built in fan moves air around to dry spools more quickly than static heating units alone.
Real Time Humidity Readings
Watch the internal humidity drop on screen so you know exactly when your filament is ready to use.
We may earn a commission when you buy through this link, at no additional cost to you.
3. Creality Space Pi X4 – High Capacity Powerhouse
Creality Filament Dryer Box 4 Spools
Capacity: 4 spools
Temp: Up to 85C
Power: Dual chambers
The Creality Space Pi X4 stands out for its ability to dry four spools at once. This makes it perfect for studios or heavy users who need to keep a large stock ready.
Pros
- Holds four spools
- High max temperature
- Dual chamber speed
Cons
- Higher price point
- Large footprint
We may earn a commission when you buy through this link, at no additional cost to you.
Its dual heating chambers deliver moisture removal up to thirty percent faster than single units. The high max temperature allows you to dry tough materials like PC or ASA that standard dryers cannot handle.
The sealed enclosure maintains humidity control even during printing pauses which protects your investment between jobs. It requires more desk space than smaller units due to its size.
This is the top pick for volume printing where speed and capacity matter most. It offers professional grade features that justify the cost for serious makers.
Dual Heating Chamber Efficiency
Two independent chambers work together to dry your filament much faster so you can return to printing sooner.
High Temperature Capability
Heat up to 85C to revive tough materials like ABS and Polycarbonate that often absorb moisture quickly.
We may earn a commission when you buy through this link, at no additional cost to you.
4. SUNLU S4 – Premium Multi Spool Solution
SUNLU S4 3D Printer Filament Dryer
Capacity: 4 spools
Power: 350W
Feature: 8 exits
The SUNLU S4 is designed for flexibility with a powerful heater and multiple exit points. It can feed four printers at once while keeping spools dry inside the sealed box.
Pros
- High power heater
- Eight exit holes
- Even air circulation
Cons
- Heavy weight
- Complex setup
We may earn a commission when you buy through this link, at no additional cost to you.
Three circulation fans ensure the temperature is consistent across the entire volume. The high power output speeds up heating times and ensures even drying without hot spots.
Its size and weight make it a permanent fixture on a workbench. The setup process takes time to route tubes but the flexibility is unmatched for multi printer farms.
Ideal for professional setups needing high throughput and versatility. It supports a wide range of materials and provides excellent control over drying conditions.
Eight Filament Exit Points
Multiple holes allow you to feed several printers at once or route filament from different angles easily.
360 Degree Surround Heating
Fans move air evenly so every part of the spool gets the same heat for consistent moisture removal.
We may earn a commission when you buy through this link, at no additional cost to you.
5. Creality Space PI Plus – Smart Touch Control
2026 New Creality Space PI Filament Dryer Plus
Capacity: 2 spools
Temp: 45-70C
Feature: 12 presets
The Creality Space PI Plus brings a modern touch screen interface to mid range dryers. It supports dual spools and offers quick settings for common filament types.
Pros
- Touch screen UI
- One key presets
- Real time humidity
Cons
- Limited capacity
- No dual chamber
We may earn a commission when you buy through this link, at no additional cost to you.
Its PTC heater provides uniform heat and the one key preset feature saves time by selecting the right temp for PLA or ABS instantly. Humidity is monitored in real time on the screen.
The max temperature is lower than top tier units which limits it for very tough materials. The capacity is standard for a desktop unit but does not scale for high volume.
Great for users who want a sleek and smart interface for everyday printing. It simplifies the drying process with automated settings and clear feedback.
One Key Filament Presets
Select from twelve preset settings to instantly set the correct temperature for different materials without guesswork.
Real Time Humidity Tracking
Keep an eye on internal humidity levels to ensure your filament stays dry during long printing runs.
We may earn a commission when you buy through this link, at no additional cost to you.
6. Polymaker Polydryer – Simple Dry and Store
Polymaker Filament Dryer & Storage Box Polydryer
Capacity: 1 spool
Feature: Desiccant
Use: Integrated
The Polymaker Polydryer combines drying and storage in a single unit. It focuses on keeping filament ready to print without breaking the seal between sessions.
Pros
- All in one system
- Integrated desiccant
- Good sealing
Cons
- Small capacity
- Slower heating
We may earn a commission when you buy through this link, at no additional cost to you.
It supports a wide range of materials and uses desiccant packs alongside heat for ongoing moisture defense. The hygrometer helps you check status without opening the box.
Capacity is limited to one spool and it lacks the high power of larger units. This makes it better for storage than fast drying large batches.
Best for users who want a tidy way to store and prep one spool at a time. It reduces handling and keeps materials fresh between prints.
Sealed Storage Protection
Move from drying to storage without opening the box so your filament stays dry until you are ready to print.
Integrated Desiccant Support
Use desiccant packs alongside heat to defend against moisture over time even when the heater is off.
We may earn a commission when you buy through this link, at no additional cost to you.
7. Creality Space Pi SE – Efficient Single Spool
Creality 2026 New Upgrade Filament Dryer Box Pro
Capacity: 1 spool
Temp: 45-65C
Feature: Knob control
The Creality Space Pi SE heats up quickly thanks to its PTC fan system. It offers a simple dial interface for adjusting time and temperature.
Pros
- Quick heating
- Simple knob dial
- Insulated walls
Cons
- Basic interface
- Single spool limit
We may earn a commission when you buy through this link, at no additional cost to you.
It features insulation to keep heat in and protect your workspace from the hot surface. The screen shows humidity and remaining time so you can plan your print schedule.
It is best suited for one spool at a time and uses a knob which some may find less precise than touch screens. The price is reasonable for its performance.
A solid choice for users who want a compact and efficient dryer for daily use. It handles common plastics well and is easy to operate.
Fast Heating Performance
Reach target temperature quickly to start drying your spool without long wait times before you can print.
Simple Knob Operation
Use a physical knob to set time and temp easily so you can start your cycle in seconds.
We may earn a commission when you buy through this link, at no additional cost to you.
8. SUNLU S4 (Black) – Robust Build
SUNLU S4 3D Printer Filament Dryer
Capacity: 4 spools
Power: 350W
Feature: 8 exits
The SUNLU S4 in black provides reliable performance for multi spool drying. It shares key features with the other S4 models like high power and multiple exits.
Pros
- High capacity
- Fast drying
- Sturdy construction
Cons
- Large size
- Heavy weight
We may earn a commission when you buy through this link, at no additional cost to you.
Its large capacity allows you to dry four spools at once which is great for running multiple printers. The heating element is powerful enough to handle long prints without dropping heat.
The size and weight are significant so plan your desk space carefully. It is a durable unit that is built to last in a busy workshop.
Choose this for high volume printing where you need to keep several spools dry simultaneously. It offers consistent results and good value for its capacity.
Multi Printer Feeding
Use the eight exit holes to run filament from up to four spools to different printers at the same time.
Strong Power Output
The 350W heater maintains stable heat even when running multiple spools and long drying cycles.
We may earn a commission when you buy through this link, at no additional cost to you.
9. SUNLU SP2 – Fast Heating and Large Spool
SUNLU 3KG Filament Dryer SP2 & Storage Box
Capacity: 3kg spool
Temp: Up to 70C
Time: 15 min heat
The SUNLU SP2 supports large 3kg spools which is rare in this price range. It also heats up quickly to get your drying started in minutes.
Pros
- Holds 3kg spools
- Fast heat up
- Touch screen
Cons
- Larger footprint
- No dual spool
We may earn a commission when you buy through this link, at no additional cost to you.
The seal is strong to keep moisture out when the heater is off. It also includes a desiccant system to monitor and maintain low humidity levels.
While it lacks multiple spool capacity it makes up for it with its large roll support. The touch screen is clear and the controls are simple to navigate.
Ideal for users who prefer buying large spools and want to dry them efficiently. It keeps big rolls dry and ready for long print jobs.
Large Spool Compatibility
The rollers and holder fit large 3kg spools so you can dry big rolls without cutting them down.
Fast Heating Cycle
Reach 70C in just fifteen minutes so you do not have to wait long to start your drying process.
We may earn a commission when you buy through this link, at no additional cost to you.
10. SUNLU S2 – Reliable Standard Model
SUNLU Filament Dryer S2
Capacity: 2 spools
Feature: Translucent lid
Use: Spool holder
The SUNLU S2 is a reliable standard model that focuses on simplicity. It acts as both a dryer and a storage holder for your spools.
Pros
- Translucent lid
- Revives damp spools
- Simple to use
Cons
- Basic features
- Smaller internal volume
We may earn a commission when you buy through this link, at no additional cost to you.
Its translucent lid lets you check on the spool without opening the lid which helps maintain the seal. The heating is fast and the temperature is adjustable for different needs.
It does not have advanced features like humidity monitoring but does the job of removing moisture well. The design is straightforward and easy to set up.
Best for users who want a no fuss dryer that works well with common plastics. It helps revive old filament and prevents moisture issues during prints.
Translucent Lid Design
Check the spool without opening the lid so you can see progress without letting moisture back in.
Damp Spool Revival
Use the heat to remove excess moisture from old spools and save money by not replacing them.
We may earn a commission when you buy through this link, at no additional cost to you.
Buying Guide – How to Choose the Best Filament Dryer for 3D Printing
Selecting the right filament dryer depends on your specific printing needs and the materials you use. Consider capacity, temperature range, and heating technology to find the best fit.
Capacity and Size
Capacity is one of the most important factors when choosing a filament dryer. Units vary from holding a single spool to four or more. If you run multiple printers or need to store a large stock, a multi-spool model like the Creality Space Pi X4 or SUNLU S4 is essential. For casual users, a single or dual spool unit like the Comgrow SH01 may suffice. Also consider the physical footprint of the dryer as larger units take up significant desk space.
Look for a capacity that matches your workflow to avoid bottlenecks. Ensure the dimensions fit your workspace and allow room for tubing and power connections.
Temperature Range
Different materials require different drying temperatures. Standard PLA and PETG typically dry well between 45C and 60C. However, materials like Polycarbonate, ABS, or Nylon may need higher temperatures up to 85C to be fully effective. Check the maximum temperature of the dryer to ensure it supports your specific filament types. Units like the Creality Space Pi X4 offer high heat options for advanced materials.
Choose a dryer with a temperature range that covers all the filaments you plan to use to avoid limited performance.
Heating Technology
Modern dryers often use PTC heaters which provide efficient and safe heating compared to older heating pads. Some models include fans to circulate air ensuring the heat is evenly distributed throughout the chamber. This prevents hot spots that could damage filament and ensures consistent drying. The SUNLU S4 uses multiple fans for 360 degree heating which improves efficiency.
Prioritize models with PTC heaters and air circulation for better drying results and safety.
Sealing and Storage
A good dryer should also function as a storage unit to keep filament dry when not in use. Look for models with airtight seals and locking lids to prevent ambient moisture from entering. Some units include desiccant ports or integrated humidity sensors to help track internal conditions. The Polymaker Polydryer is designed to transition seamlessly from drying to sealed storage.
Ensure the seal is robust to maintain the dry environment after the drying cycle is complete.
Control Interface
User interfaces range from simple knobs to touch screens and LCD displays. Touch screens offer easier adjustments and clear feedback on temperature and humidity. Some models also provide presets for different filament types to simplify operation. Consider how much you value ease of use versus cost when looking at controls.
Choose a control type that you find intuitive and easy to read during operation.
Filament Exit Options
Many dryers offer multiple exit holes or flexible tubing to feed filament directly from the dryer to the printer. This allows you to print while drying which saves time. Models like the SUNLU S4 offer up to eight exit points for complex multi-printer setups. Check if the exits are well placed to avoid tangled tubes.
Look for flexible exit options if you want to dry filament actively during your printing sessions.
Build Quality and Durability
Since dryers run for hours on end, build quality matters. Plastic units are common but should feel sturdy. Check for reinforced joints or thick plastic walls that can withstand heat. Heavier models often indicate better insulation and durability. Avoid very cheap units that may warp over time due to heat exposure.
Invest in a unit with solid construction to ensure it lasts through frequent use.
Budget and Value
Prices vary significantly from budget models under fifty dollars to premium units over one hundred. Higher price points usually bring better capacity, heating power, and additional features like humidity monitoring. Assess how much you print and how many materials you use to determine the return on investment. A higher end model may save you from wasted prints over time.
Balance the upfront cost against the features you need to avoid overspending on capabilities you will not use.
How to Use and Care for Your Filament Dryer for 3D Printing
To start using your dryer place the filament spool on the internal holder and ensure the filament feeds through the exit hole. Close the lid securely to create a seal and set the desired temperature and time on the control panel.
Once the cycle is complete check the humidity display if available to confirm dryness. You can then run the filament directly into your printer or store it in the sealed unit if you are not printing immediately.
Regularly clean the interior to prevent dust buildup and check the seals for wear. Replace desiccant packs as needed to keep the environment dry between uses.
Frequently Asked Questions
How long does it take to dry a spool of filament?
Drying times vary based on the material and current moisture level but most models recommend anywhere from four to twenty four hours for initial drying. Some fast heating units claim to reduce this time significantly. Check your filament type for specific recommendations.
Can I leave my filament in the dryer while printing?
Yes most dryers are designed to allow you to feed filament directly into the printer while drying is active. This ensures the material stays dry throughout the print and prevents re-absorption of humidity.
What temperature should I use for PLA?
PLA typically dries best at temperatures between forty five and fifty degrees Celsius. Going higher than this range may warp or damage the filament so stick to the manufacturer's recommended settings for PLA.
Do filament dryers work with all spool sizes?
Most dryers are designed for standard 1kg spools but high capacity models can handle 3kg rolls. Always check the internal dimensions and roller design to confirm compatibility with your specific spool size.
Why is my filament still damp after drying?
If filament remains damp ensure the dryer is sealed properly and the temperature is high enough for the material. Some filaments may need longer cycles to reach maximum dryness especially in humid environments.
Can I use a filament dryer for storage?
Many dryers double as storage units with airtight seals that keep moisture out when the heater is off. This helps maintain the dry state of your filament between printing sessions without needing vacuum bags.
How do I clean a filament dryer?
Clean the interior with a dry cloth to remove dust and wipe down the sensors if accessible. Avoid using water or harsh chemicals inside the chamber to prevent damage to the heating elements or electronics.
Final Thoughts on Choosing the Best Filament Dryer for 3D Printing
We have reviewed ten top models ranging from budget friendly options to high capacity units for professional use. The Comgrow SH01 offers great value for beginners while the Creality Space Pi X4 delivers power for heavy duty users.
Prioritize capacity and temperature range when making your decision to ensure the unit fits your specific printing needs. Investing in the right dryer can save you money on wasted prints and materials.
Prices and availability are subject to change so verify the current offers before purchasing. Use the links in this guide to find the best deal for your needs today.