Moisture control
The Best Filament Dryers for PETG, TPU and Nylon
We compared purpose-built dryers on temperature stability, spool capacity, and print-while-drying support, using manufacturer specs, independent test data, and long-term owner reports.
Updated September 2026 · 5 products scored
Lena OrtizWriter
Ranked by our score
Highest overall first. Each card shows the score, star rating, standout pros, who it is for, and an Amazon link to check the current price.
- Rank 1
Top Ranked Choice
Score 9.0 out of 10
Our score
$116.99regular $139.99
Sunlu
Filament Dryer S4
Four spools, stable heat, and print-through ports
- Genuine four-spool capacity
- Stable thermostat across long cycles
Sunlu Filament Dryer S4 ranks first of 5 in this guide at 9.0/10. Built for Multi-material desks that keep PETG, TPU, and nylon on deck at the same time. Ease of use is its strongest score at 9.3/10.
- Rank 2
Score 8.6 out of 10
Our score
$75often $60 to $90
Also greatCreality
Space Pi Plus
Two spools in one chamber, without jumping to a four-bay box
- Real two-spool capacity
- Same simple Creality presets as the single Space Pi
Creality Space Pi Plus ranks 2nd of 5 in this guide at 8.6/10. Built for Shops that dry two active spools at once and do not need four independent bays. Value is its strongest score at 8.7/10, and print quality and durability tie for its lowest score at 8.4/10.
- Rank 3
Score 8.4 out of 10
Our score
$56
Also greatCreality
Space Pi
A compact one-spool dryer with one-tap presets
- Fast heat-up and even airflow
- Clear touchscreen presets
Creality Space Pi ranks 3rd of 5 in this guide at 8.4/10. Built for Owners who dry one active spool at a time and want simple presets. Value is its strongest score at 9.0/10, and print quality and compatibility tie for its lowest score at 8.2/10.
- Rank 4
Score 8.3 out of 10
Our score
$79
Upgrade pickSovol
SH02 Dry Box
Sealed storage plus active drying in one chassis
- Sealed storage design
- PTC heater with touchscreen
Sovol SH02 Dry Box ranks 4th of 5 in this guide at 8.3/10. Built for Shops that want dry storage and active drying without a four-bay unit. Durability is its strongest score at 8.5/10, and value is its lowest score at 8.0/10.
- Rank 5
Score 8.0 out of 10
Our score
$44.99regular $79.99
Budget pickSunlu
Filament Dryer S2
The best starter dryer if you only run one spool
- Affordable
- Simple controls
Sunlu Filament Dryer S2 ranks 5th of 5 in this guide at 8.0/10. Built for First dryer buyers who print PETG or TPU occasionally. At $44.99, it is the cheapest option in this guide, and value is its strongest score at 9.1/10.
Sunlu Filament Dryer S4
$116.99 regular $139.99
Check price on AmazonFour spools, stable heat, and print-through ports
The S4 held target temperatures within a tight band and dried four mid-size spools without stacking gimmicks. Print-through PTFE ports mean you can dry while you print; something cheaper dehydrators make awkward.
Who it's for
Multi-material desks that keep PETG, TPU, and nylon on deck at the same time.
Pros
- Genuine four-spool capacity
- Stable thermostat across long cycles
- Print-while-drying ports
Cons
- Bulky on a crowded bench
- App features are optional fluff
Score comparison
All scores are out of 10. The overall score blends the five criteria below, weighted by what matters most in this category. See how we score.
| Product | Overall | Print quality | Durability | Value | Ease of use | Compatibility | Price | Buy |
|---|---|---|---|---|---|---|---|---|
| Sunlu Filament Dryer S4Our pick | 9.0 | 8.6 | 8.8 | 8.5 | 9.3 | 9.0 | $116.99 | Check price on Amazon |
| Creality Space Pi PlusAlso great | 8.6 | 8.4 | 8.4 | 8.7 | 8.6 | 8.5 | $75 | Check price on Amazon |
| Creality Space PiAlso great | 8.4 | 8.2 | 8.3 | 9.0 | 8.8 | 8.2 | $56 | Check price on Amazon |
| Sovol SH02 Dry BoxUpgrade pick | 8.3 | 8.1 | 8.5 | 8.0 | 8.4 | 8.1 | $79 | Check price on Amazon |
| Sunlu Filament Dryer S2Budget pick | 8.0 | 7.8 | 7.9 | 9.1 | 8.5 | 8.0 | $44.99 | Check price on Amazon |
How we compared them
We compared purpose-built dryers on temperature stability, spool capacity, and print-while-drying support, using manufacturer specs, independent test data, and long-term owner reports.
Frequently asked questions
- Can I print while drying filament?
- Yes on the Sunlu S4. Print-through PTFE ports mean you can dry while you print. That is on the S4 scorecard on this page.