Our pick
9.0
Filament dryers
Sunlu Filament Dryer S4
Four spools, stable heat, and print-through ports
$129
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.
See the full Filament dryers comparison guide for alternatives and score tables.
Scorecard
Overall9.0
Print quality8.6
8.6
Durability8.8
8.8
Value8.5
8.5
Ease of use9.3
9.3
Compatibility9.0
9.0
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
Specs
- Capacity
- 4 spools
- Temp range
- 35–70 °C
- Heater
- 350 W PTC
- Print-through
- Yes