8.6
At a Glance
Filament dryerCategory
Single-spool diagnostic dryerRole
70 CMax Temp
1 spoolCapacity
YesPrint Through
NoVentilation
Best For
Stringing PETGNylon & TPUBambu A1/A1 Mini
Pros & Cons
Pros
- Single-spool format is the right size for diagnosing whether wet filament is actually the cause of stringing, popping, and dull surfaces.
- Active heat and a compact footprint make it easier to leave on the bench than a food-dehydrator workaround.
- Print-through path supports long PETG or TPU prints without moving the spool back into room air.
- Good middle ground for users who need real drying but do not yet need a four-spool station.
Cons
- One spool at a time becomes frustrating once you rotate several colors or materials every week.
- You still need dry storage boxes for partial rolls after the drying cycle.
- No single dryer can fix under-extrusion, retraction, or temperature mistakes that only look like moisture.
Our Verdict
The SUNLU S2 is the most practical first filament dryer for a small Print Climate bench. It gives you a repeatable moisture-control step without forcing a huge workstation change, and it pairs naturally with sealed dry boxes once you have more than two active rolls.
| Full Specifications | |
|---|---|
| Category | Filament dryer |
| Role | Single-spool diagnostic dryer |
| Max Temp | 70C |
| Capacity | 1 spool |
| Active Heat | Yes |
| Active Airflow | Yes |
| Humidity Readout | Yes |
| Print Through | Yes |
| Ventilation | No |
| Resin Workflow | No |
| Abrasive Ready | No |
| Best Materials | PETG, TPU, PLA+ |
| Footprint | Compact bench box |
Related Buying Guides
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Head-to-Head Comparisons
S2 Filament Dryer vs SUNLU S4 Four-Spool Filament DryerS2 Filament Dryer vs Creality Space Pi SE Filament DryerS2 Filament Dryer vs Polymaker PolyDryer BoxS2 Filament Dryer vs Filament Storage Box 4-Pack with HygrometersS2 Filament Dryer vs Bambu A1/A1 Mini Hardened Hotend KitS2 Filament Dryer vs Anycubic Wash and Cure 3S2 Filament Dryer vs FDM 3D Printer Enclosure with Vent Kit and HygrometerS2 Filament Dryer vs Resin Printer Enclosure with Ventilation Kit
SUNLU S2 Single-Spool Filament Dryer
$79
Prices may change - check current Amazon listing.