SUNLU S1 Plus Filament Dryer, White
4.7Editor score
Affordable entry-level design
Ultra quiet under ten dB
Two roller feeding system
In this guide
Selecting the right 3D Printer Filament Dryer Box is essential for achieving high-quality prints without moisture-related defects. Modern units combine active drying with sealed storage to keep your spools ready for use anytime.
We evaluated ten leading models based on heating efficiency, capacity, ease of use, and build quality. Each product was reviewed against real-world printing needs to ensure reliable performance across various filament types.
Every pick highlights key strengths, limitations, and ideal use cases for different printers. Prices and availability change frequently, so verify current details before purchasing to ensure you get the best value.
Top 3 Picks for Best 3D Printer Filament Dryer Box
SUNLU S4 3D Printer Filament Dryer Boxer, Black
4.7Editor score
Holds four 1kg spools
350W rapid PTC heating
Triple fan uniform airflow
Creality Filament Dryer Box 4 Spools, Space Pi X4
4.6Editor score
Dual independent 200W chambers
85 degrees Celsius max temp
Touch UI scene presets
Top 10 Best 3D Printer Filament Dryer Box in 2026 Compared
The following table offers a side-by-side comparison of all ten models, highlighting capacity, heating power, temperature range, and key design features to help you quickly identify the best fit for your setup.
ProductsSpecificationsEditor scorePrice
Best Budget
Comgrow 3D Printer Filament Dryer Box
Two 1kg spool capacity
40 to 50 Celsius range
Silicone outlet cable sheath
4.4Editor score
Editor's Choice
Creality Filament Dryer Box 4 Spools
Four standard 1kg spools
Dual 200W heating chambers
85 degrees Celsius max temp
4.6Editor score
Best Premium
Creality Space Pi SE Filament Dryer
One kg spool capacity
360 degree PTC heating
45 to 65 Celsius range
4.4Editor score
Creality Space PI Filament Dryer
3.7 inch touch screen
One key twelve presets
48 hour timer function
4.4Editor score
SUNLU S1 Plus Filament Dryer
Two 1kg spool capacity
Built-in fan circulation
35 to 55 Celsius range
4.3Editor score
Polymaker Polydryer Filament Storage Box
Active desiccant support
Built-in hygrometer included
Sealed storage design
4.4Editor score
SUNLU SP2 3KG Filament Dryer
Up to 3kg spool fit
250W PTC element
Detachable dryer base
4.4Editor score
Sovol SH02 Filament Dryer
Dual spool drying holes
150W fast PTC heater
One key filament presets
4.3Editor score
SUNLU S4 Filament Dryer Boxer
Four 1kg spool capacity
350W PTC heater
Smart auto humidity control
4.7Editor score
SUNLU S1 Plus Filament Dryer White
Ultra quiet under ten dB
Two inch LCD screen
1 to 99 hour timer
4.7Editor score
1. SUNLU S4 Filament Dryer Boxer – Best Overall Drying Capacity
SUNLU S4 3D Printer Filament Dryer Boxer, Black
Four spools simultaneous drying
350W PTC heating power
Auto humidity control mode
Triple fan airflow system
The SUNLU S4 3D Printer Filament Dryer Boxer earns Editor's Choice for its unmatched capacity and intelligent automation. With a rating of 4.7, it stands out for handling multiple spools at once while maintaining consistent environmental conditions inside the chamber.
Pros
- Holds up to four spools
- Fast heating with 350W PTC
- Smart humidity automation
- Uniform temperature with triple fans
- Supports four printer connection
Cons
- Larger footprint than single spool units
- Higher price point than entry models
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Its standout features include a powerful 350W PTC heater that reaches target temperatures quickly, and three internal fans that ensure airflow remains uniform across all spools. The smart auto humidity control lets you set a desired range, activating drying only when needed to prevent waste.
While the unit is larger than compact models, this footprint accommodates four standard 1kg spools, making it ideal for multi-color or multi-machine setups. The triple security system, which includes a temperature switch and software protection, ensures safe operation without user intervention.
Anyone running multiple printers or printing frequently will benefit most from this dryer. It reduces the need to dry spools separately and keeps them sealed after drying. For users prioritizing volume and smart features, the SUNLU S4 is a top recommendation.
Multi-Spool Efficiency
Drying four spools simultaneously reduces downtime and ensures all materials are ready before your next print job begins.
Smart Humidity Automation
Auto mode monitors internal humidity and only activates drying when necessary, saving energy while keeping filament in optimal condition.
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2. Creality Space Pi X4 – Best Premium Dual-Chamber Performance
Creality Filament Dryer Box 4 Spools, Space Pi X4
Dual 200W heating chambers
85 degrees Celsius max temp
Four 1kg spool capacity
Touch UI with presets
The Creality Space Pi X4 offers premium performance with dual independent heating chambers, enabling faster drying than single-chamber models. Its 4.6 rating reflects reliability and efficient moisture removal for high-volume users.
Pros
- Independent heating chambers
- High 85°C temperature cap
- Faster moisture removal
- Touch UI with filament scenes
- Silicone-sealed enclosure
Cons
- Premium price for advanced features
- May be overkill for casual users
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The dual 200W chambers work independently to dry two spools faster while maintaining humidity control for others. The unit reaches 85°C, unlocking advanced materials like ABS and PC. A touch UI provides quick scene presets for different filament types.
Though more expensive, the added capacity and speed justify the cost for professionals. The illuminated window lets you check spools without breaking the seal, ensuring continuous protection. Sealing remains robust thanks to silicone gaskets.
Users needing fast turnaround and high-temperature drying will appreciate the X4. It balances storage and active drying perfectly, reducing waste and ensuring consistent prints across long jobs.
Dual Chamber Speed
Independent chambers allow drying two spools simultaneously at full power while others wait in humidity-controlled storage.
High-Temp Capability
The 85°C cap ensures even moisture-resistant materials like nylon or polycarbonate are fully dried for best results.
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3. SUNLU S1 Plus – Best Budget Friendly Entry-Level Dryer
SUNLU S1 Plus Filament Dryer, White
Ultra quiet ten decibel operation
35 to 55 Celsius range
Two inch LCD display
Two internal rollers
The SUNLU S1 Plus Filament Dryer is the top budget pick, combining reliability with an accessible price. Its 4.7 rating shows users appreciate its quiet design and effective drying for common materials.
Pros
- Very quiet operation
- Simple controls
- Affordable price point
- Good basic drying performance
- Supports multiple diameters
Cons
- Lower max temperature than high-end
- Smaller capacity compared to 4-spool units
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It uses a simple control scheme with a 2-inch LCD that shows time and temperature clearly. The unit operates under 10dB, making it suitable for home environments without noise. Two internal rollers help feed filament smoothly into the extruder.
While it lacks advanced automation found in pricier models, it handles most standard filaments like PLA and PETG well. The temperature range suits common needs and prevents overheating. Sealing is adequate to protect spools during storage when off.
Ideal for hobbyists and small workshops, this dryer delivers essential functions without extra cost. If you need basic drying and noise-free operation, the S1 Plus is a smart value choice.
Noise-Free Operation
Under 10dB noise ensures the dryer won't disrupt work or sleep when running overnight.
User-Friendly Interface
Simple controls and clear display reduce setup time and make it easy to set correct drying conditions.
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4. Comgrow Dryer Box – Reliable Sealed Storage and Heating
Comgrow 3D Printer Filament Dryer Box
Two 1kg spool capacity
LCD screen with buttons
Silicone outlet sheath
40 to 50 Celsius range
The Comgrow 3D Printer Filament Dryer Box offers reliable performance with a clear LCD interface. Its 4.4 rating reflects solid sealing and straightforward operation for drying common filaments.
Pros
- Clear LCD display
- Good sealing with snap closure
- Fits multiple filament sizes
- Easy manual controls
Cons
- Limited to 50°C max
- Short auto-shutoff without work mode
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It stores two 1kg spools and includes an internal heating system that maintains 40 to 50°C. The silicone cable sheath allows feeding while keeping the outlet sealed when not in use. Snap closures ensure a tight seal to avoid moisture re-entry.
While it doesn't exceed 50°C, this range is sufficient for PLA, ABS, and PETG. The board shuts down after three minutes without work mode, which conserves energy but requires attention during setup.
Suitable for users wanting a compact dryer with visual feedback. It balances price and performance for standard printing tasks without needing complex automation.
Clear Visual Feedback
LCD display and touch buttons show temperature and time clearly, reducing guesswork during setup.
Sealing Design
Silicone sheath and snap closure keep moisture out during storage and printing alike.
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5. Creality Space Pi SE – Efficient Single Spool Solution
Creality Space Pi SE Filament Dryer
360 degree PTC heating
45 to 65 Celsius range
Countdown timer display
Knob control interface
The Creality Space Pi SE is designed for efficiency with quick heating and even air circulation. Its 4.4 rating reflects solid drying performance for single spool needs.
Pros
- Fast heating in 15 mins
- 360 degree air circulation
- Simple knob interface
- Good thermal insulation
Cons
- Single spool only
- No humidity display
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A built-in fan ensures hot air reaches all sides of the spool in 15 minutes. The range of 45 to 65°C suits most common filaments. A knob interface and countdown timer make operation straightforward.
Thermal insulation helps maintain temperature and prevents the exterior from getting hot. However, it does not show internal humidity, so users rely on time and temperature settings.
Best for users who need to dry spools quickly between prints. The compact design fits easily in any workspace.
Fast Heating
Quick warm-up reduces downtime, allowing spools to be dried between print jobs efficiently.
Even Airflow
360 degree circulation ensures uniform drying, avoiding hot spots that could damage filament.
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6. Creality Space PI Filament Dryer – Smart One-Key Presets
Creality Space PI Filament Dryer
3.7 inch touch screen
12 filament presets
Up to 48 hours timer
Power-off memory
The Creality Space PI offers a 3.7-inch touch screen and twelve preset modes for various filament types. Its 4.4 rating reflects strong usability and reliable drying.
Pros
- Touch screen UI
- Multiple filament presets
- Long timer options
- Memory after power loss
Cons
- Requires power source
- Larger than minimal units
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Presets simplify setup for materials like PLA-CF and PA-CF. The 48-hour timer allows overnight drying and the power-off memory saves settings. Touch controls enable easy adjustments to temperature and duration.
This model is best for users who prefer automation and quick settings changes. While larger than compact dryers, the screen and presets improve workflow efficiency.
Recommended for those who want a modern interface without manual adjustments for every spool.
Preset Convenience
One-touch settings for multiple filament types eliminate manual trial and error.
Power Memory
Memory retains last settings after outages, preventing the need to reconfigure drying conditions.
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7. SUNLU S1 Plus Black Edition – Fan Assisted Drying
SUNLU S1 Plus Filament Dryer Box
Built-in fan circulation
35 to 55 Celsius range
2 inch LCD display
Large internal capacity
The SUNLU S1 Plus Black Edition emphasizes fan-assisted drying to remove moisture faster. Its 4.3 rating reflects users who value quick drying cycles.
Pros
- Fan speeds up drying
- Clear LCD readout
- Fits most spools
- Custom temperature settings
Cons
- Fan noise higher than white model
- No humidity sensor
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The internal fan circulates heated air to avoid cold spots. The 2-inch LCD displays time, temperature, and humidity. Adjustable temperature settings allow customization for different conditions.
While slightly louder than the white variant, the fan improves drying speed significantly. It fits most standard spools and works across various brands.
Ideal for users needing faster drying without sacrificing control. The balance of features suits intermediate printers.
Air Circulation
Fan design accelerates moisture removal, reducing overall drying time compared to passive units.
Visual Monitoring
Clear LCD keeps users informed of internal conditions, improving confidence in drying progress.
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8. Polymaker Polydryer – Passive Storage and Desiccant Support
Polymaker Polydryer Filament Storage Box
Sealed enclosure design
Desiccant support slots
Built-in hygrometer
Printing without opening
The Polymaker Polydryer focuses on storage protection using desiccant support and humidity monitoring. Its 4.4 rating reflects strong long-term filament preservation.
Pros
- Humidity tracking
- Long-term storage
- No power needed
- Fits multiple filament types
Cons
- No active heating
- Requires desiccant packs
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It does not heat but seals spools to prevent re-absorption. The built-in hygrometer allows checking humidity without opening. You can print through the sealed box without breaking the environment.
Ideal for users who already dry filament but need safe storage. It complements active dryers by keeping spools ready for use.
Best paired with a heater or separate drying process for fully dried storage.
Humidity Visibility
Hygrometer lets users see internal humidity levels to verify dryness without guessing.
Sealed Feeding
Print through the box to keep spools dry even during pauses or overnight storage.
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9. SUNLU SP2 Filament Dryer – Large Spool Support
SUNLU SP2 3KG Filament Dryer
Holds up to 3kg spool
250W PTC element
Detachable storage base
HD LCD touch screen
The SUNLU SP2 Filament Dryer supports large 3kg spools with fast heating. Its 4.4 rating reflects reliability for heavy users.
Pros
- Large spool capacity
- Quick 15 min heating
- Touch screen display
- Humidity monitoring included
Cons
- Higher price point
- Bulky size
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The 250W heater reaches 70°C in 15 minutes. It includes an HD touch screen and humidity monitoring. The detachable base lets you use the storage box separately after drying.
Ideal for industrial or professional use where spool size varies. The sealing maintains temp and dryness even off power.
Best for users needing versatility in spool sizes without separate storage solutions.
Large Spool Fit
Rollers and bar holder support up to 3kg spools, covering most commercial filament types.
Detachable Design
Base separates for standalone storage, maintaining sealing even after drying is complete.
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10. Sovol SH02 Filament Dryer – Dual Spool and Safety Features
Sovol SH02 Filament Dryer
Dual spool holes
150W PTC heater
9 filament presets
Thermal safety cutoff
The Sovol SH02 Filament Dryer supports two spools with a 150W PTC heater. Its 4.3 rating reflects solid performance for its price.
Pros
- Dual spool drying
- Quick heating
- Built-in safety cutoff
- One-key presets
Cons
- Fan can alert on failure
- No auto humidity
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It reaches 70°C within 25 minutes and includes nine one-key presets. Safety features cut power if temperature exceeds 130°C or fan fails, protecting the unit from damage.
Best for users needing dual spool capacity without high-end features. The sealing remains strong even when unpowered.
Ideal for small studios wanting to dry multiple filament types safely.
Dual Spool Capacity
Drying two spools at once speeds up preparation and reduces idle printer time.
Safety Protections
Auto cut-off and alarm systems prevent overheating and fan failure risks.
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Buying Guide – How to Choose the Best 3D Printer Filament Dryer Box
Selecting the right filament dryer depends on capacity, heating power, and features that match your workflow. This guide outlines key factors to consider before making a decision.
Heating Capacity and Power
Heating power determines how quickly a dryer reaches target temperatures. Units with PTC heaters ranging from 150W to 350W offer faster cycles compared to lower wattage models. More power is useful for large spools or multiple prints.
Look for heaters that reach 70°C or higher for specialty materials like nylon or PC. Adequate power ensures moisture removal without prolonged wait times.
Spool Capacity and Size
Capacity ranges from single spools to four standard 1kg rolls. Consider how many materials you use at once or during long print runs. Larger boxes may require more desk space but reduce downtime.
Choose a box that fits your common spool weights and diameters. Models supporting up to 3kg are ideal for bulk filament users.
Sealing and Storage Design
Effective sealing prevents re-absorption of moisture after drying. Gaskets, silicone sheaths, and latch closures ensure spools stay dry during pauses or overnight. Some models allow feeding while maintaining the sealed environment.
Prioritize units with proven sealing mechanisms for best long-term protection. This factor is as important as heating power.
User Interface and Controls
Interfaces range from simple knobs and buttons to touch screens with presets. A clear display showing time, temperature, and humidity helps monitor conditions. One-key presets simplify setup for multiple materials.
Select an interface that matches your technical comfort. Touch screens offer more flexibility but may cost more.
Airflow and Circulation
Uniform airflow ensures all parts of the spool reach target temperature. Units with internal fans or 360° heating avoid hot spots and dry more evenly. Fans also help expel moisture from the chamber.
Choose models with multiple fans or forced air circulation for best consistency. This reduces the risk of uneven drying.
Safety Features and Protection
Safety includes thermal cutoffs, power-off memory, and alarms for fan failure. These prevent overheating and protect both the unit and filament. Some dryers include humidity monitoring to avoid over-drying.
Look for built-in safety systems that shut down on temperature spikes. This ensures safe unattended operation.
Connectivity and Automation
Advanced models support auto-humidity control or connections to multiple printers. These features reduce manual input and keep the drying process adaptive. Smart automation saves energy by only running when needed.
Prioritize automation if you use the dryer daily or in humid climates. This ensures consistent results without constant supervision.
How to Use and Care for Your 3D Printer Filament Dryer Box
Place the filament spool inside the dryer box and ensure the outlet is sealed except for the feeding path. Set the temperature based on your filament type, usually 45 to 60°C for common materials.
Run the dryer for at least 3 to 6 hours before printing. Monitor the display for temperature stability and avoid opening the box prematurely to maintain the environment.
After drying, leave the spool inside the sealed box or transfer it to a vacuum bag. Clean the interior periodically to remove dust and replace desiccants if included to ensure long-term dryness.
Frequently Asked Questions
Do filament dryers actually improve print quality?
Yes, filament dryers significantly reduce moisture-related issues like stringing, clogging, and poor layer adhesion. Removing water vapor from hygroscopic materials ensures smoother extrusion and better surface finish.
How long should I dry my filament before printing?
Most common filaments need 3 to 6 hours at recommended temperatures. Specialty materials like nylon or polycarbonate may require longer cycles to ensure complete moisture removal.
Can I print while the filament is inside the dryer box?
Many models are designed to allow continuous printing while spools dry inside. The feeding path remains sealed to prevent moisture re-entry during the print process.
What temperature should I set for PLA versus ABS?
PLA typically dries well at 45 to 50°C, while ABS can handle higher temperatures around 60°C. Always check filament manufacturer recommendations for exact drying ranges.
Is it necessary to use a hygrometer inside the dryer?
A hygrometer helps verify that internal humidity stays low enough for optimal printing. It is especially useful for materials that absorb moisture quickly in humid environments.
Can one dryer box handle multiple spools at once?
Yes, many modern dryers support multiple spools simultaneously. Larger units can hold up to four 1kg spools, enabling efficient drying for multi-material or multi-color printing.
Final Thoughts on Choosing the Best 3D Printer Filament Dryer Box
The SUNLU S4, Creality Space Pi X4, and SUNLU S1 Plus represent the top options for capacity, performance, and value respectively. Each model offers unique advantages depending on your printing volume and material needs.
Prioritize heating power, sealing quality, and ease of use when selecting a dryer. Units with smart humidity control or multi-spool capacity deliver the best results for demanding workflows.
Remember that prices and availability may change frequently. Verify current specifications and promotions before purchasing to ensure you select the most suitable filament dryer box for your setup.