SUNLU Filament Dryer Box 2026 New Upgrade S1 Plus
4.3Editor score
Fast drying with fan design
Visual LCD display for settings
Adjustable temperature range
In this guide
Filament dryers are essential tools for anyone serious about 3D printing quality. Moisture absorption ruins prints by causing bubbles and stringing. A good dryer box keeps your spools dry during storage and printing.
We compared ten top-rated models based on capacity, heating speed, and ease of use. Each product offers unique features like dual chambers or preset temperatures. Our goal is to help you find the right fit.
Each pick highlights key specs, pros, and cons to guide your decision. Prices and availability change frequently, so verify details before buying. Investing in a dryer protects your filament investment from moisture damage.
Top 3 Picks for Best Filament Dryer Box
Creality Filament Dryer Box 4 Spools Space Pi X4
4.6Editor score
Holds 4 standard spools
Dual heating chambers
Precise temperature control
Official Creality Filament Dryer Space Pi X4 DB-05
4.6Editor score
Dual independent heating chambers
Supports engineering filaments
Energy saving modes
Top 10 Best Filament Dryer Box in 2026 Compared
This side-by-side comparison highlights the key specifications of all ten models. Use this table to quickly identify capacity, heating capabilities, and unique features for each option.
ProductsSpecificationsEditor scorePrice
Best Budget
SUNLU Filament Dryer Box S1 Plus
Max capacity 1 spool
Fan assisted drying
LCD screen display
Temperature 35-55C
4.3Editor score
Editor's Choice
Creality Space Pi X4 Dryer
Holds 4 spools
Dual 200W heaters
Max temp 85C
Touch UI interface
4.6Editor score
Best Premium
Comgrow SH01 Filament Dryer
Holds 2 spools
Silicone cable sheath
LCD screen display
Max temp 50C
4.4Editor score
Polymaker Polydryer Storage Box
Holds 1 spool
Hygrometer included
Airtight seal
No active heating
4.4Editor score
SUNLU Filament Dryer S2
Large capacity design
Built-in spindle
Touch screen control
Max temp 70C
4.3Editor score
Comgrow SH02 Filament Dryer
Holds 2 spools
360 PTC heater
One key presets
Max temp 70C
4.4Editor score
Creality Space Pi Dryer 2026
360 hot air heating
Touch screen display
One key presets
Power-off memory
4.4Editor score
Creality Space Pi Dryer Plus
Dual spool design
360 hot air heating
Humidity monitor
Max temp 70C
4.4Editor score
Creality Space Pi X4L Dryer
Holds 4 spools
Dual heating chambers
Max temp 75C
Illuminated window
4.5Editor score
Official Creality Space Pi X4 DB-05
Holds 4 spools
Dual 200W heaters
Max temp 85C
Energy saving modes
4.6Editor score
1. SUNLU S1 Plus – Best Value Option
SUNLU Filament Dryer Box 2026 New Upgrade S1 Plus
Max capacity 1 spool
LCD screen display
Fan assisted drying
Temperature 35-55C
The SUNLU S1 Plus is an affordable option for drying filament. It uses a fan to speed up moisture removal and has a clear LCD display. This model is great for casual users.
Pros
- Affordable price point
- Fan speeds up drying
- Easy LCD controls
- Compatible with most filaments
- Helps reduce stringing
Cons
- Single spool capacity
- Max temp limited to 55C
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Its fan design helps remove excess water quickly. The LCD screen shows temperature and humidity clearly. You can adjust settings easily for different materials like PLA or PETG.
The maximum temperature is capped at 55C which limits high temp filaments. Capacity is limited to one spool which may not suit large setups. These trade-offs fit its budget price.
Buy this if you need a simple cheap dryer for standard materials. It effectively reduces moisture issues for everyday printing. Ideal for those starting out or needing a quick fix.
Fast Fan Drying
The built-in fan helps expel moisture faster than passive models.
Simple Controls
LCD screen lets you view time and temp at a glance.
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2. Creality Space Pi X4 – Best Overall
Creality Filament Dryer Box 4 Spools Space Pi X4
Holds 4 spools
Dual 200W heaters
Max temp 85C
Touch UI interface
The Creality Space Pi X4 is a top tier dryer for serious users. It holds four spools and uses dual heating chambers for speed. The touch UI makes settings easy.
Pros
- Large 4 spool capacity
- Dual heating chambers
- High max temp 85C
- Precise touch UI
- Dual drying and storage
Cons
- Higher price point
- Large footprint
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Its dual chambers allow efficient moisture removal in less time. High temp capability handles engineering filaments well. The sealed design keeps filament dry even during pauses.
It is expensive and takes up space on your desk. The complexity may be overkill for simple PLA users. Still, it offers unmatched flexibility for multi-material printing.
Choose this for high volume or engineering printing. It protects your filament investment with advanced features. The capacity and speed justify the cost for pros.
Dual Chamber Speed
Dual 200W heaters remove moisture thirty percent faster.
High Temperature Support
Heating to 85C allows drying of engineering grades.
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3. Comgrow SH01 – Solid Mid Range Pick
Comgrow 3D Printer Filament Dryer Box SH01
Holds 2 spools
Silicone cable sheath
LCD screen display
Max temp 50C
The Comgrow SH01 offers a balanced design for two spools. It features a sealed outlet to keep moisture out while printing. The LCD screen makes settings clear.
Pros
- Holds two spools
- Sealed outlet design
- Easy LCD operation
- Good price value
Cons
- Lower max temp 50C
- Auto shutdown if no screen mode
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Its sealing helps prevent moisture re-absorption during use. The outlet design fits various printer setups well. It works well for PLA and PETG which do not need high heat.
The temp cap limits use with engineering filaments. Auto shutdown can be annoying if left idle too long. Still it provides good protection for standard filaments.
Buy this for dual spool setups with basic needs. It offers good value for money with reliable sealing. Perfect for hobbyists needing more than one spool.
Sealed Outlet
Silicone sheath seals the outlet when not printing.
LCD Display
Real-time monitoring of temp and humidity helps tracking.
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4. Polymaker Polydryer – Passive Storage Focus
Polymaker Polydryer Filament Storage Box
Holds 1 spool
Hygrometer included
Airtight seal
No active heating
The Polymaker Polydryer focuses on airtight storage rather than active drying. It includes a hygrometer so you can track humidity levels. It uses desiccants to absorb moisture.
Pros
- Airtight storage seal
- Built-in hygrometer
- Simpler design
- Compatible with many materials
Cons
- No active heating element
- Relies on desiccant
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Its seal is strong and prevents humidity from entering. The hygrometer helps you know when desiccant needs replacing. It works well if you have dry filament to store.
It does not actively dry damp filament so pre-drying is needed. Best for storage between prints rather than restoration. This limits utility if your filament is already wet.
Choose this for long term storage protection. It maintains dryness well once filament is dry. Ideal for organizing spools with clear humidity tracking.
Hygrometer Monitor
Built-in hygrometer helps track storage humidity levels.
Seal Design
Airtight design locks out moisture effectively.
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5. SUNLU S2 – Large Capacity Spindle
SUNLU Filament Dryer S2
Large capacity design
Built-in spindle
Touch screen control
Max temp 70C
The SUNLU S2 uses a spindle to keep filament moving for even heat. It has a large capacity and a clear touch screen. A translucent lid lets you check without opening.
Pros
- Spindle ensures even drying
- Large internal capacity
- Touch screen easy use
- Translucent lid check
Cons
- Complex setup for some
- Higher price
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The continuous spin prevents hot spots on the spool. It heats up quickly to preset temps. You can set custom times up to ninety nine hours.
The design is slightly more complex than static boxes. Price is higher than basic options. Still, even drying is a major benefit for consistent prints.
Buy this if you want even drying for all spools. It is great for users who print often. The capacity fits well in most setups.
Even Drying
Built-in spindle spins filament continuously for uniform heat.
Translucent Lid
Check spools without opening the box to keep dry.
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6. Comgrow SH02 – Fast PTC Heating
Comgrow Filament Dryer Box SH02
Holds 2 spools
360 PTC heater
One key presets
Max temp 70C
The Comgrow SH02 features a 360 PTC heater for fast air flow. It includes one key presets for common filament types. Safety features cut power if temps get too high.
Pros
- Fast 360 hot air
- One key filament presets
- Touch screen interface
- Safety protection features
Cons
- Fan alarm if stops
- Two spool limit
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The circulating air ensures uniform heat across the spool. Presets simplify setup for PLA PETG and others. Safety alarms alert if the fan stops working.
If the fan fails the alarm can be loud but useful. Two spool capacity may be tight for multi-printer setups. Otherwise it is a strong contender.
Choose this for fast heating with simple presets. It offers good safety for long drying sessions. Best for users wanting quick setup.
360 Circulation
Built-in fan circulates hot air for uniform heating.
Safety Features
Auto cut off prevents overheating of the PTC module.
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7. Creality Space PI 2026 – New Upgrade
Creality Space PI Filament Dryer 2026
360 hot air heating
Touch screen display
One key presets
Power-off memory
The Creality Space PI 2026 upgrades the heating to 360 air flow. It remembers settings after power loss. One key presets support twelve filament types for quick use.
Pros
- 360 hot air system
- Power-off memory
- One key for 12 types
- Long timer up to 48h
Cons
- Basic single chamber design
- Standard max temp
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The 48 hour timer allows long drying cycles. The touch screen tracks conditions easily. It handles composites like CF filaments well.
It is a single chamber design so it handles one spool. Basic temp limit fits most needs but not extreme engineering. The memory feature adds reliability.
Buy this for quick presets and memory reliability. It is good for general purpose drying. Ideal for users who value simplicity.
Power Memory
Remembers settings after power outage for fast restart.
Preset System
One key settings for twelve filament types simplify use.
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8. Creality Space PI Plus – Dual Spool
Creality Space PI Filament Dryer Plus
Dual spool design
360 hot air heating
Humidity monitor
Max temp 70C
The Plus version adds dual spool support to the PI design. It includes a humidity monitor to track conditions. The 360 heating ensures uniform drying.
Pros
- Handles two spools
- Real-time humidity monitor
- 360 hot air
- 12 filament presets
Cons
- No dual chamber control
- Max temp limit
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The monitor helps ensure filament is dry before printing. Presets make it easy to switch materials. It supports composites well.
Temps are capped at 70C so engineering needs are limited. It is not dual chamber so temps are shared. Still it is a solid dual spool option.
Choose this for dual spool drying with monitoring. It offers balanced features for hobbyists. Great for those needing more than one spool.
Humidity Monitor
Real-time humidity tracking ensures dry storage environment.
Dual Spool
Accommodates two standard spools for versatile use.
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9. Creality Space Pi X4L – Fast High Volume
Creality Space Pi X4L Filament Dryer
Holds 4 spools
Dual heating chambers
Max temp 75C
Illuminated window
The X4L is built for high volume with four spool capacity. It uses dual chambers for rapid moisture removal. The window lets you check without opening.
Pros
- Holds four spools
- Dual heating chambers
- High speed drying
- Illuminated window
Cons
- Price premium
- Large size
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Dual chambers help remove moisture thirty percent faster. High temp supports engineering filaments well. The sealed design maintains dryness effectively.
It is large and costly which limits budget users. But speed and capacity are unmatched in this range. Great for professional multi-printer setups.
Buy this for max capacity and speed. It is ideal for production environments. Protects your investment with top features.
Dual Chamber Speed
Dual chambers remove moisture thirty percent faster.
Window View
Illuminated window lets you monitor spools easily.
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10. Creality Space Pi X4 DB-05 – Premium Engineering
Official Creality Filament Dryer Space Pi X4 DB-05
Holds 4 spools
Dual 200W heaters
Max temp 85C
Energy saving modes
The Official DB-05 is a premium dryer for engineering. It has dual independent chambers to dry two types at once. High temp supports PA and PC filaments.
Pros
- Dual independent heating
- 85C max temp
- Four spool capacity
- Energy saving single mode
Cons
- Expensive
- Complex for simple needs
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You can save energy using single chamber mode. Dual heaters heat to 85C quickly. It is ideal for professional engineering prints.
The cost is high and complexity may be too much. Still it offers unmatched flexibility and speed. Best for advanced users with specific needs.
Choose this for engineering filament and efficiency. It saves energy with smart modes. A top pick for professionals.
Independent Control
Dual chambers allow different temps for two spools.
Energy Efficiency
Single chamber mode saves up to forty percent energy.
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Buying Guide – How to Choose the Best Filament Dryer Box
Choosing the right filament dryer box involves considering capacity, heating speed, and features. Here are key factors to evaluate for your setup.
Capacity and Spool Count
Consider how many spools you need to dry at once. Single spool boxes are compact and affordable while multi-spool models save time for high volume. Larger units take more desk space but reduce wait times.
Select capacity based on your print frequency and desk space.
Heating Technology and Speed
Look for PTC heaters or fans which distribute heat evenly. Models with 360 hot air systems dry faster than static heaters. Dual chambers allow simultaneous drying of different materials efficiently.
Higher wattage and air circulation reduce drying time.
Maximum Temperature Range
Check the max temperature. Basic dryers cap at 55C for PLA while others reach 85C for engineering filaments. Ensure the range covers your materials to avoid under-drying.
Match max temp to your filament needs.
Controls and User Interface
Touch screens and LCD displays make settings clear. Presets for common materials simplify setup. Memory functions help after power outages so you do not reset often.
Choose intuitive interfaces for daily ease.
Sealing and Storage
Airtight seals with silicone rings prevent moisture re-absorption. Some models include hygrometers to track humidity. Good sealing helps keep filament dry between prints without active heating.
Prioritize sealed designs for long storage.
Safety Features
Look for auto shut-off and alarm alerts if fans fail. Overheat protection prevents damage to the unit and filament. These features protect your investment during long runs.
Safety features ensure reliable operation.
Price and Value
Prices vary widely from budget to premium models. Consider your filament investment and how often you print. A higher cost model may save money by preventing failed prints due to moisture.
Balance cost against your print needs.
Compatibility
Ensure compatibility with your filament diameter like 1.75mm or 2.85mm. Check if it supports the width of your spools. Universal fits work with most brands and types.
Verify compatibility before buying.
How to Use and Care for Your Filament Dryer Box
Place the filament spool inside the dryer and feed the end through the outlet hole. Seal the outlet with the plug when not actively printing. Set the temperature and timer based on your material type.
Let the dryer run for the full cycle to remove moisture thoroughly. For very wet filament allow longer durations. Keep the box on a stable surface away from flammable materials.
Clean the interior regularly and check sealing rings for wear. Replace desiccants if using a passive storage box. Keep the exterior dry and store the unit properly between uses.
Frequently Asked Questions
Do I need a filament dryer if I store spools in a dry cabinet?
A dry cabinet keeps filament dry over time but does not actively dry already wet spools. A filament dryer is needed to restore moisture absorbed filament before printing. Both are useful for maintenance and restoration.
How long does it take to dry PLA filament?
PLA usually needs 4 to 8 hours at 45C to 55C. Humidity levels and spool age affect this. Check for reduced stringing to confirm it is dry.
Can I use a dryer for engineering filaments like ABS?
Yes but ensure the dryer reaches at least 70C to 85C. Engineering filaments need higher heat to remove moisture effectively. Check the max temp of the model.
Does the dryer work while printing?
Yes most models allow printing while the filament sits inside. Feed the filament from the dryer to the printer directly. Keep the outlet sealed to maintain dryness.
What is the best temperature for PETG?
PETG works well at 50C to 55C. Too high heat can deform the spool. Set the timer for about 4 to 6 hours for best results.
Are there passive dryers that do not need electricity?
Yes storage boxes with desiccants and seals keep filament dry without heating. They require periodic desiccant changes and are best for maintenance rather than active drying.
Final Thoughts on Choosing the Best Filament Dryer Box
Our top picks highlight value and capability for different needs. The SUNLU S1 Plus is great for budget users. The Creality Space Pi X4 offers high volume power.
Prioritize max temp and capacity based on your common prints. Safety and sealing features add long-term value. A good dryer protects your filament investment.
Prices change frequently so verify details before purchase. Check for current deals and availability on trusted sites. Invest wisely to improve print quality today.