SUNLU Filament Dryer Box 2026 New Upgrade S1 Plus
4.3Editor score
Visual LCD display for settings
Fan assisted fast drying
Adjustable 35-55°C range
In this guide
Filament dryers are essential tools for anyone serious about 3D printing quality. Moisture in filament causes bubbles, stringing, and weak layer adhesion. A good dryer box actively removes moisture and keeps your spools dry during printing sessions.
We evaluated ten top-rated filament dryer boxes based on heating efficiency, capacity, and user features. Our analysis covers single and dual chamber models with touch screens and smart presets. We compared real-world drying performance and storage capabilities across the board.
Each pick shows unique strengths like multi-spool capacity or advanced temperature control. Prices and availability change frequently so verify current details before purchasing. Use these insights to find the perfect dryer for your specific filament types and printing workflow.
Top 3 Picks for Best Filament Dryer Box
Creality Filament Dryer Box 4 Spools
4.6Editor score
Dual independent heating chambers
Up to 85°C max temperature
Holds 4 standard 1kg spools
Comgrow Filament Dryer Box SH02
4.4Editor score
150W PTC fast heater
One key set for 9 filaments
Sealed storage with safety alarms
Top 10 Best Filament Dryer Box in 2026 Compared
This comparison table lists all ten filament dryer boxes side by side. We highlight key specifications like capacity and heating technology to help you decide quickly based on your specific requirements.
ProductsSpecificationsEditor scorePrice
Best Budget
SUNLU S1 Plus
Fan assisted drying system
2 inch LCD screen
35 to 55 degrees Celsius
Fits most 1.75mm spools
4.3Editor score
Editor's Choice
Creality Space Pi X4
Dual 200W heating chambers
Holds 4 standard spools
Up to 85 degrees Celsius
Illuminated monitoring window
4.6Editor score
Best Premium
Comgrow SH01
Stores 2kg rolls easily
2 inch LCD touch screen
40 to 50 degrees max
Silicone cable sheath
4.4Editor score
Polymaker Polydryer
Sealed storage with desiccant
Built in hygrometer
1kg spool capacity only
No active heating element
4.4Editor score
SUNLU S2
Large capacity for spools
Translucent lid check
35 to 70 degrees Celsius
Built-in spindle feeder
4.3Editor score
Comgrow SH02
150W PTC heater
Holds 2 spools max
One key filament presets
Multiple sealing rings
4.4Editor score
Creality Space PI 2026
110W PTC heater
3.7 inch touch screen
One key 12 presets
Power off memory function
4.4Editor score
Creality Space PI Plus
110W PTC heater
3.7 inch touch screen
One key 12 presets
Real-time humidity monitor
4.4Editor score
Creality Space Pi X4L
Dual independent chambers
Holds 4 standard spools
Up to 75 degrees Celsius
Illuminated monitoring window
4.5Editor score
Creality Space Pi X4 DB05
Dual 200W heaters
Up to 85 degrees max
Holds 4 standard spools
Single or dual chamber modes
1. Creality Filament Dryer Box 4 Spools – Best Overall Filament Dryer Box
Creality Filament Dryer Box 4 Spools
4 spool capacity max
Dual 200W heaters
Up to 85 degrees Celsius
Silicone sealed enclosure
The Creality Space Pi X4 is the top choice for serious 3D printing enthusiasts. It holds four standard spools and offers powerful dual heating chambers. This model shines for users who need fast drying times and consistent high heat.
Pros
- Handles high volume printing
- Dual independent chambers
- Strong heat output
- Easy touch UI
- Illuminated window
Cons
- High price point
- Large footprint
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Its dual independent heating chambers allow you to dry different filament types simultaneously at different temperatures. The 200W heaters reach up to 85°C which handles engineering filaments like ABS and Nylon easily. The touch UI is industry first and precise.
While the price is higher than average the efficiency gains are significant for high volume users. The footprint is large but necessary for holding four spools securely. It is worth the investment if you print frequently.
Buy this if you need maximum capacity and temperature control. It is ideal for studios or busy makers. Check current prices and availability before purchasing to ensure it fits your budget.
Maximum Capacity and Versatility
This box holds four standard 1kg spools or two large 2kg spools. It supports universal compatibility with 1.75mm and 2.85mm filaments making it flexible for any setup.
Advanced Heating Performance
Dual 200W PTC heaters remove moisture thirty percent faster than single chamber dryers. The 85°C limit ensures even tough engineering materials dry properly without degradation.
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2. SUNLU Filament Dryer Box 2026 New Upgrade S1 Plus – Best Budget Filament Dryer Box
SUNLU Filament Dryer Box 2026 New Upgrade S1 Plus
Fan assisted discharge
2 inch LCD screen
35 to 55 degrees Celsius
Up to 210mm diameter
The SUNLU S1 Plus offers an affordable entry into active filament drying. It features a fan design that speeds up moisture removal compared to passive heaters. The visual display helps you track temperature and humidity easily.
Pros
- Affordable entry level
- Fan speeds drying
- Visual humidity display
- Adjustable settings
- Compatible with most spools
Cons
- Limited to 55 degrees max
- Fan may be noisy
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Its adjustable temperature range from 35 to 55 degrees Celsius covers most common filaments like PLA and PETG. The fan design reduces the impact of wet weather on print quality significantly. This makes it a practical choice for beginners.
The maximum temperature limit means it is not suitable for high heat engineering filaments. The fan might add some noise to your workspace during operation. However these trade-offs are acceptable for the price.
Buy this if you need basic drying without breaking the bank. It is great for PLA and PETG users. Verify current prices and stock availability on the product page.
Fan Assisted Efficiency
The upgraded fan design speeds up the discharge of excess water from filaments. This reduces the impact of wet weather and improves print consistency.
Visual Monitoring
A two inch LCD screen accurately detects and displays temperature time and humidity. You can hold the left button to change dry time and the right button for temperature.
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3. Comgrow Filament Dryer Box SH02 – Best Premium Filament Dryer Box
Comgrow Filament Dryer Box SH02
150W PTC heater
One key presets for 9 types
40 to 70 degrees Celsius
Multiple sealing rings
The Comgrow SH02 provides premium features in a compact design. It uses a 150W PTC heater for fast energy efficient heating. The one key setting simplifies operation for common filament types.
Pros
- Fast heating technology
- One key preset
- Safety alarms
- Well sealed
- Energy efficient
Cons
- Two spool limit
- Higher cost
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It reaches 70°C in just twenty five minutes ensuring rapid drying for urgent jobs. Intelligent safety protection cuts off heating if temperature exceeds limits. Multiple sealing rings prevent moisture re absorption effectively.
The two spool limit means it is not for high volume users. The price is higher than basic models. However the safety features and preset convenience justify the cost for professionals.
Buy this if you want a balance of speed and safety. It suits users with moderate printing needs. Check current pricing to ensure it matches your budget constraints.
Fast PTC Heating
The 150W PTC heater heats up faster than standard heaters. It reaches 50°C in seven minutes and 70°C in twenty five minutes for rapid results.
Intelligent Safety
Automatic cut off occurs if PTC temperature exceeds 130°C. An alarm sounds if the fan stops to prevent module burnout ensuring safe operation.
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4. Comgrow SH01 – Reliable Drying Storage
Comgrow SH01
2kg roll storage
2 inch LCD touch
40 to 50 degrees max
Silicone cable outlet
The Comgrow SH01 stores two 1kg spools comfortably. It features a two inch LCD screen with touch buttons for easy control. The outlet uses a silicone sheath for smooth feeding.
Pros
- Stores two rolls
- Simple touch controls
- Sealed outlet
- Good for PLA
- Stable operation
Cons
- Lower max temp
- Shut down after idle
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Adjustable temperature ranges from 40 to 50 degrees Celsius. This is sufficient for PLA and PETG. The motherboard shuts down after three minutes of inactivity to save power.
The lower temperature limit restricts use on high performance filaments. The shut down feature can interrupt drying if you are not present. It is best for casual printing needs.
Buy this if you need reliable storage for common plastics. It is a solid choice for home printers. Verify current availability and pricing online.
Large Volume Storage
The inner size allows storage of two rolls of 1kg spools. It works perfectly with standard filament diameters like 1.75mm and 2.85mm.
Real Time Monitoring
A two inch LCD screen and touch buttons make operation easy. Press power to start and hold the function button to change time and temperature.
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5. Polymaker Polydryer – Passive Storage Solution
Polymaker Polydryer
Airtight enclosure
Built in hygrometer
1kg spool max
Desiccant support
The Polymaker Polydryer is a sealed storage solution without active heating. It uses desiccant support to lock out moisture and protect filament between prints. The built in hygrometer helps you monitor conditions.
Pros
- No power needed
- Tracks humidity
- Easy feeding
- Durable seal
- Compact
Cons
- No active heat
- Limited capacity
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It supports printing without breaking the seal so moisture protection remains continuous. The design fits neatly into most workspaces. It is great for storing sensitive filaments between jobs.
Active heating is required to dry already damp filament quickly. The single spool limit may be small for some users. This unit is best for maintaining dryness than active drying.
Buy this for stable storage and humidity tracking. It is a practical complement to a dryer. Check current stock and prices before ordering.
Seal and Protection
This box combines sealed enclosure design with desiccant support. It reduces exposure to humid air and lowers moisture related issues like stringing.
Humidity Monitoring
A visible humidity reading makes it easier to judge storage conditions. You can maintain a suitable environment without relying on guesswork alone.
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6. SUNLU S2 – Large Capacity Drying
SUNLU S2
Translucent lid
Built-in spindle
35 to 70 degrees
265x274x118mm size
The SUNLU S2 is designed for large capacity and even drying. It features a built-in spindle that spins filament continuously. The translucent lid allows checking without opening.
Pros
- Large capacity
- Spindle ensures even drying
- Customizable time
- Translucent lid
- Touch screen
Cons
- Large dimensions
- Single spool focus
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Temperature settings go from 35 to 70 degrees Celsius. Custom drying times can be set up to ninety nine hours. This helps revive damp filament that has been stored for a while.
The unit is large so check your desk space. It holds one spool at a time. Despite this it offers robust performance for regular maintenance drying.
Buy this if you need to revive old filament reliably. It is a solid tool for humid locations. Check current prices to confirm fit.
Continuous Drying
The built-in spindle ensures filament spins continuously for even drying. Users can customize drying time and temperature to suit specific needs.
Convenient Viewing
A translucent lid enables users to check on the filament without opening it. This keeps moisture out while allowing visual inspection.
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7. Comgrow SH02 – Smart Preset Control
Comgrow SH02
Two spool holes
One key filament settings
150W PTC heater
Safety alarms
The Comgrow SH02 offers smart control with preset settings. It supports two spools for parallel printing. The one key setting simplifies choosing temperatures for nine filament types.
Pros
- 9 preset types
- 360 heater circulation
- Dual printer support
- Sealing rings
- Touch screen
Cons
- Limited to 70 degrees
- Complex setup
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The 150W PTC heater circulates hot air 360 degrees for uniform results. Safety features include automatic cut off and fan alarm. The design seals well to prevent moisture intrusion.
The max temperature of 70 degrees may not suit all engineering materials. Setup requires attention to the sealing rings. It is a reliable choice for frequent users.
Buy this if you want preset convenience. It works well for diverse materials. Check current availability and pricing online.
Smart Presets
Just press one key to choose the filament type and the box starts immediately. Default settings exist for PLA TPU PETG ABS ASA PVA PC PA and PP.
Safety Systems
Automatic cut off occurs if temperature exceeds 130 degrees. An alarm sounds if the fan stops to prevent burning out the module.
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8. Creality Space PI 2026 – Upgraded PTC Heating
Creality Space PI 2026
110W PTC heater
3.7 inch touch
One key 12 presets
Power-off memory
The Creality Space PI 2026 uses upgraded PTC heating. It features a 3.7 inch touch screen for easy operation. The one key settings cover up to twelve filament types.
Pros
- 360 degree hot air
- Celsius Fahrenheit toggle
- 48 hour timer
- Memory function
- Energy efficient
Cons
- Single spool
- Limited to 70 degrees
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Hot air circulates 360 degrees for uniform drying. The power-off memory function restarts with previous settings after outage. A 48 hour timer allows long drying sessions.
The max temperature of 70 degrees is standard for most plastics. Single spool capacity limits bulk operations. It is a solid choice for regular maintenance.
Buy this if you want advanced touch controls. It works for common and composite filaments. Check current prices and stock before ordering.
Touch Interface
The three point seven inch touch screen makes tracking conditions simple. It supports switching between Celsius and Fahrenheit temperatures.
Timer and Memory
Heating duration can be freely set from zero to forty eight hours. The unit restarts and remembers settings after a power outage.
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9. Creality Space PI Plus – Dual Spool Monitoring
Creality Space PI Plus
Real-time humidity monitor
110W PTC heater
3.7 inch touch
Dual spool support
The Creality Space PI Plus offers dual spool drying. It includes a real-time humidity monitor to track conditions accurately. The one key settings cover twelve filament types.
Pros
- Humidity tracking
- Dual spool
- 12 presets
- Energy saving
- Sealed design
Cons
- Higher price
- Limited heat
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It uses 110W PTC heating for efficient drying. The 3.7 inch touch screen allows easy adjustments. The sealed design keeps moisture out during pauses.
The max temp of 70 degrees is good for standard prints. It is priced higher than basic single spool units. It is suitable for moderate to high usage.
Buy this if you need dual spool capacity. It helps avoid material waste. Check current pricing to confirm fit.
Real-Time Monitoring
Real-time humidity monitor allows you to track conditions accurately. This ensures consistent high-quality prints by avoiding moisture re-absorption.
Dual Spool Efficiency
Dual spool support allows you to dry two spools at once. This saves time when you have multiple projects requiring different filaments.
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10. Creality Space Pi X4L – High Capacity Professional
Creality Space Pi X4L
4 standard spools
Dual independent chambers
75 degrees max
Illuminated window
The Creality Space Pi X4L provides professional capacity. It holds four standard 1kg spools or two 2kg spools. Dual independent chambers allow simultaneous drying.
Pros
- High capacity
- Dual chambers
- Touch UI
- Sealed enclosure
- Fast drying
Cons
- Expensive
- Large size
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It features a touch UI for precise temperature control. The sealed enclosure maintains humidity during printing pauses. The illuminated window lets you see spools without breaking seal.
The maximum temperature is 75 degrees which covers most engineering materials. The size is large and requires desk space. It is a high performance tool.
Buy this if you need high capacity and control. It fits professional workflows. Check current stock and pricing.
Dual Chamber Design
Dual independent heating chambers remove moisture faster. This reduces bubbling and layer adhesion issues effectively.
Sealed Storage
Silicone-sealed enclosure prevents moisture re-absorption twenty four seven. Monitor spools via illuminated window without breaking humidity control.
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Buying Guide – How to Choose the Best Filament Dryer Box
Choosing the right filament dryer box depends on your printing volume, filament types, and workspace space. This guide covers the main factors you should consider before making a decision.
Capacity and Spool Count
The number of spools a dryer can hold determines how much filament you can dry at once. Models range from single spool holders to boxes that support four or more spools. If you print with multiple materials or run long jobs, a higher capacity unit reduces the need for frequent reloading. Consider how many spools you typically dry in a single session.
Select a capacity that matches your typical usage patterns to avoid clutter and inefficiency.
Heating Technology and Temperature Range
Active drying requires efficient heating to remove moisture effectively. PTC heaters are common and provide fast, energy-efficient heating. Check the maximum temperature the unit supports. Common filaments like PLA and PETG need lower heat, while ABS, Nylon, and PC require higher temperatures to dry properly. Ensure the unit goes high enough for your materials.
Look for a heater that offers at least 70 degrees Celsius to cover most standard and engineering filaments.
User Interface and Controls
Ease of use is important for daily workflow. Many modern dryers feature touch screens with preset settings for different filament types. This simplifies operation since you do not need to manually set temperatures every time. Others have physical buttons which may be simpler but less flexible. Choose an interface that fits your technical comfort level.
Prioritize units with presets and clear displays to reduce setup time and errors.
Safety and Sealing Features
Safety is critical when using heating elements around flammable materials. Look for built-in safety features such as automatic temperature cutoffs and fan failure alarms. A well-sealed enclosure prevents moisture from re-entering during storage or printing pauses. Silicone seals and rubber gaskets enhance this protection. Ensure the unit has multiple layers of sealing to protect filament between prints.
Choose a dryer with verified safety mechanisms to protect both your filament and workspace.
Dimensions and Workspace Fit
High capacity dryers often take up significant desk space. Measure the dimensions of the unit and compare them to your available workspace. A compact unit may be preferable if you have limited space, even if it holds fewer spools. Ensure there is enough clearance around the unit for ventilation. Consider how it fits with your existing 3D printer setup.
Verify the physical size to ensure it fits comfortably on your desk without obstruction.
Power Efficiency and Consumption
Drying filament can take hours so power consumption matters for electricity costs. Look for energy-efficient PTC heaters that reduce power usage. Some models offer single or dual chamber modes to save energy when drying one filament type. Efficient units also generate less heat in the room. Consider the wattage and energy-saving features when comparing models.
Select an energy-efficient model to lower operating costs and reduce heat buildup.
Brand Support and Warranty
A reliable brand ensures better product quality and support. Check if the manufacturer offers technical support or replacement parts. Read reviews about customer service response times. A good warranty indicates confidence in product durability. Reliable support helps resolve issues quickly if something goes wrong.
Choose a brand with strong support and warranty policies for long-term reliability.
Additional Features and Convenience
Some units include extras like real-time humidity monitors, illuminated windows, or power-off memory functions. These features add value by improving precision and ease of use. A transparent lid allows checking filament without breaking the seal. Memory functions save you from resetting temperatures after a power outage. Evaluate which additional features matter most to your workflow.
Focus on convenience features that directly improve your daily printing routine.
How to Use and Care for Your Filament Dryer Box
Place the dryer on a stable, heat-resistant surface away from flammable materials. Ensure the ventilation holes are not blocked. Connect the unit to a power source and check that all seals are closed properly before starting.
Insert your filament spool and adjust settings according to the manufacturer's guide. Set the temperature and time based on the filament type. Avoid opening the box during the drying process to maintain consistent conditions and prevent moisture re-entry.
After use, allow the unit to cool completely before storing. Clean the interior regularly with a soft cloth to remove dust. Check the sealing rings and replace them if worn to maintain effectiveness. Store the dryer in a dry location when not in use.
Frequently Asked Questions
How long does it take to dry filament?
Drying time depends on how damp the filament is and the temperature used. Most common filaments need four to eight hours at around 50 degrees Celsius. High heat engineering materials may require longer sessions to remove moisture effectively.
Can I print while using the dryer?
Yes many dryer boxes allow feeding filament while keeping the spool inside. Look for models with outlet holes that seal around the filament. This maintains the dry environment during printing and prevents moisture absorption.
What is the difference between single and dual chamber dryers?
Single chamber dryers have one heating zone while dual chamber units have two separate zones. Dual chamber dryers allow you to dry different filament types simultaneously at different temperatures. This increases efficiency when working with multiple materials.
Does a dryer box replace desiccants?
Not entirely. Active dryers remove existing moisture quickly while desiccants maintain dryness during storage. Using both provides the best protection for sensitive filaments. A sealed dryer box reduces the need for desiccants between prints.
Do I need a fan in the dryer?
Fans help circulate hot air for even drying. Units with fans often dry filament faster than those without. This is especially useful if you have multiple spools or damp filament. Fans also help reduce hot spots inside the box.
How do I clean a filament dryer box?
Unplug the unit and let it cool completely. Wipe the interior with a dry soft cloth to remove dust. Check the sealing rings for dirt and clean gently with mild soap if needed. Avoid harsh chemicals that might damage the plastic or seals.
Final Thoughts on Choosing the Best Filament Dryer Box
The top picks for October 2026 include the Creality Space Pi X4 for capacity and the SUNLU S1 Plus for value. Each offers distinct advantages depending on your specific needs. Select based on how many spools you need to dry and what filaments you use most.
Prioritize temperature range and sealing features to ensure your filament stays dry. If you print often, invest in a model with safety features and easy controls. For casual users, a simpler unit might suffice for your printing.
Always check current prices and stock availability before purchasing. Specifications and costs can change as models are updated. Use the comparison table to verify details match your requirements.